:root {
  --bg: #fbfbfd;
  --surface: #ffffff;
  --side: #f7f7f9;
  --hover: #e9ebf3;
  --text: #0f172a;
  --text-2: #334155;
  --muted: #6b7489;
  --border: #e4e7ef;
  --border-strong: #d2d7e3;
  --accent: #1e3fae;
  --accent-hi: #2a52d6;
  --ink: #0f172a;
  --accent-soft: #e8edff;
  --gold: #ffcc00;
  --user: #f1f2f6;
  --danger: #dc2626;
  --code-bg: #0e1424;
  --code-head: #161e33;
  --shadow-sm: 0 1px 2px rgb(15 23 42 / .06);
  --shadow: 0 1px 2px rgb(15 23 42 / .04);
  --ring: none;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f1a;
    --surface: #121829;
    --side: #0e1320;
    --hover: #182035;
    --text: #e7eaf3;
    --text-2: #c4cad9;
    --muted: #8a93ab;
    --border: #1d2539;
    --border-strong: #2a3451;
    --accent: #8ea8ff;
    --accent-hi: #a9bcff;
    --ink: #e7eaf3;
    --accent-soft: #19244a;
    --user: #19213a;
    --code-bg: #070a12;
    --code-head: #10172a;
    --shadow: 0 12px 40px -12px rgb(0 0 0 / .6), 0 2px 6px rgb(0 0 0 / .3);
    --ring: none;
    color-scheme: dark;
  }
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  display: flex; background: var(--bg); color: var(--text);
  font: 15.5px/1.65 var(--font); -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
.i { width: 18px; height: 18px; flex-shrink: 0; }
::selection { background: var(--accent-soft); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 10px; border: 3px solid transparent; background-clip: padding-box; }

.icon-btn {
  display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  color: var(--muted); transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--hover); color: var(--text); }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); font-weight: 500; font-size: 14px;
  transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--hover); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hi); }
.btn-link { font-size: 13px; color: var(--muted); padding: 4px 0; }
.btn-link:hover { text-decoration: underline; }
.danger { color: var(--danger) !important; }

.logo { display: block; width: 30px; height: 30px; }

/* ---------- sidebar ---------- */
#sidebar {
  width: 272px; flex-shrink: 0; background: var(--side); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 14px 12px 12px; gap: 10px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 2px 6px 6px; }
.brand-name { font-size: 19px; font-weight: 700; letter-spacing: -.02em; }
.brand-name b { font-weight: 500; color: var(--muted); }

.btn-new {
  display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px 12px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  font-weight: 600; font-size: 14px; transition: border-color .15s, box-shadow .15s;
}
.btn-new:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }
.btn-new .i { color: var(--accent); }

.search {
  display: flex; align-items: center; gap: 8px; padding: 0 10px; border-radius: 10px; color: var(--muted);
  background: transparent; border: 1px solid transparent; transition: border-color .15s, background .15s;
}
.search:focus-within { background: var(--surface); border-color: var(--border); }
.search .i { width: 16px; height: 16px; }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; padding: 8px 0; font-size: 14px; }

#chatList { flex: 1; overflow-y: auto; margin: 0 -4px; padding: 0 4px; }
.group-label { font-size: 11.5px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; padding: 14px 10px 6px; }
.chat-item {
  position: relative; display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 10px;
  cursor: pointer; font-size: 14px; color: var(--text-2); transition: background .12s;
}
.chat-item span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-item:hover { background: var(--hover); }
.chat-item.active { background: var(--surface); color: var(--text); font-weight: 500; box-shadow: var(--shadow-sm); }
.chat-item.active::before { content: ""; position: absolute; left: 0; top: 9px; bottom: 9px; width: 3px; border-radius: 3px; background: var(--accent); }
.list-empty { padding: 20px 10px; color: var(--muted); font-size: 13px; text-align: center; }

.user-row {
  display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: 12px; text-align: left;
  border-top: 1px solid var(--border); border-radius: 0 0 12px 12px; padding-top: 12px; transition: background .15s;
}
.user-row:hover { background: var(--hover); border-radius: 12px; }
.user-row > .i { color: var(--muted); }
.user-avatar {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), #4d6ff0); color: #fff; font-weight: 600; font-size: 14px;
}
.user-text { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.3; }
.user-text > span { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-text small { color: var(--muted); font-size: 12px; }

#scrim { display: none; }

/* ---------- main ---------- */
main { flex: 1; display: flex; flex-direction: column; min-width: 0; position: relative; }
.topbar {
  display: flex; align-items: center; gap: 10px; padding: 10px 18px; height: 56px;
  border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px); z-index: 2;
}
.topbar h2 { flex: 1; margin: 0; font-size: 15px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#menu { display: none; }
.model-pill {
  display: inline-flex; align-items: center; gap: 7px; padding: 5px 11px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); font-size: 12.5px; font-weight: 500; color: var(--text-2);
  white-space: nowrap;
}
.eu-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 3px rgb(255 204 0 / .2); }

#messages { flex: 1; overflow-y: auto; scroll-behavior: smooth; }
#thread { max-width: 780px; margin: 0 auto; padding: 28px 22px 12px; }

/* ---------- empty state ---------- */
.hero { display: flex; flex-direction: column; align-items: center; text-align: center; padding-top: 9vh; animation: rise .5s ease both; }
.hero .logo { width: 64px; height: 64px; margin-bottom: 22px; filter: drop-shadow(0 10px 24px rgb(30 63 174 / .35)); }
.hero h1 { margin: 0; font-size: 30px; font-weight: 700; letter-spacing: -.025em; }
.hero p { margin: 8px 0 30px; color: var(--muted); font-size: 15px; }
.suggestions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; max-width: 620px; }
.suggestion {
  display: flex; align-items: flex-start; gap: 12px; padding: 14px; border-radius: 14px; text-align: left;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.suggestion:hover { transform: translateY(-2px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.suggestion .ico { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); flex-shrink: 0; }
.suggestion strong { display: block; font-size: 14px; font-weight: 600; }
.suggestion small { display: block; color: var(--muted); font-size: 13px; line-height: 1.4; margin-top: 2px; }

/* ---------- messages ---------- */
.msg { display: flex; gap: 14px; margin-bottom: 26px; animation: rise .25s ease both; }
.msg .content { flex: 1; min-width: 0; }
.msg.user { justify-content: flex-end; }
.msg.user .content { display: flex; flex-direction: column; align-items: flex-end; }
.msg.user .bubble {
  background: var(--user); border-radius: 20px 20px 6px 20px; padding: 10px 16px; max-width: 85%;
  white-space: pre-wrap; word-wrap: break-word;
}
.avatar { width: 30px; height: 30px; flex-shrink: 0; margin-top: 1px; }
.avatar .logo { width: 30px; height: 30px; }

.md { word-wrap: break-word; }
.md > :first-child { margin-top: 0; }
.md > :last-child { margin-bottom: 0; }
.md p, .md ul, .md ol, .md blockquote, .md .table-wrap, .md .codeblock { margin: 0 0 14px; }
.md h1, .md h2, .md h3, .md h4 { margin: 22px 0 10px; line-height: 1.3; letter-spacing: -.015em; }
.md h1 { font-size: 1.45em; } .md h2 { font-size: 1.25em; } .md h3 { font-size: 1.1em; }
.md ul, .md ol { padding-left: 1.4em; }
.md li { margin: 4px 0; }
.md li::marker { color: var(--muted); }
.md strong { font-weight: 600; }
.md a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.md a:hover { border-bottom-color: var(--accent); }
.md blockquote { border-left: 3px solid var(--accent); padding: 2px 0 2px 14px; color: var(--text-2); }
.md hr { border: 0; border-top: 1px solid var(--border); margin: 20px 0; }
.md :not(pre) > code { font-family: var(--mono); font-size: .86em; background: var(--hover); padding: 2px 6px; border-radius: 6px; }
.md img { max-width: 100%; border-radius: 10px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
.md table { border-collapse: collapse; width: 100%; font-size: 14px; }
.md th { background: var(--side); font-weight: 600; text-align: left; }
.md th, .md td { padding: 8px 12px; border-bottom: 1px solid var(--border); }
.md tr:last-child td { border-bottom: 0; }

.codeblock { border-radius: 12px; overflow: hidden; background: var(--code-bg); border: 1px solid #1d2741; }
.code-head { display: flex; align-items: center; justify-content: space-between; padding: 6px 8px 6px 14px; background: var(--code-head); color: #9aa6c3; font: 500 12px var(--mono); }
.code-head .copy-btn { color: #9aa6c3; }
.code-head .copy-btn:hover { color: #fff; background: rgb(255 255 255 / .08); }
.codeblock pre { margin: 0; padding: 14px 16px; overflow-x: auto; }
.codeblock code, .codeblock .hljs { font: 13.5px/1.6 var(--mono); background: transparent !important; color: #e6edf3; padding: 0; }

.copy-btn { display: inline-flex; align-items: center; gap: 6px; padding: 4px 8px; border-radius: 7px; font-size: 12.5px; color: var(--muted); transition: background .12s, color .12s; }
.copy-btn .i { width: 15px; height: 15px; }
.copy-btn:hover { background: var(--hover); color: var(--text); }

.actions { display: flex; gap: 2px; margin-top: 6px; margin-left: -8px; opacity: 0; transition: opacity .15s; }
.msg:hover .actions, .msg.last .actions { opacity: 1; }
.error-box { display: flex; gap: 10px; align-items: flex-start; margin-top: 8px; padding: 10px 14px; border-radius: 12px; font-size: 14px; color: var(--danger); background: color-mix(in srgb, var(--danger) 8%, transparent); border: 1px solid color-mix(in srgb, var(--danger) 25%, transparent); word-break: break-word; }

/* streaming indicators */
.md.streaming:empty::after { content: ""; display: inline-block; width: 44px; height: 10px; margin-top: 8px;
  background: radial-gradient(circle closest-side, var(--muted) 90%, transparent) 0 50% / 10px 10px no-repeat,
              radial-gradient(circle closest-side, var(--muted) 90%, transparent) 17px 50% / 10px 10px no-repeat,
              radial-gradient(circle closest-side, var(--muted) 90%, transparent) 34px 50% / 10px 10px no-repeat;
  animation: dots 1.2s infinite linear; }
.md.streaming > :last-child::after { content: ""; display: inline-block; width: 8px; height: 1.05em; margin-left: 3px; vertical-align: -2px; border-radius: 2px; background: var(--accent); animation: blink 1s steps(2) infinite; }
.md.streaming > .codeblock:last-child::after, .md.streaming > .table-wrap:last-child::after { display: none; }
@keyframes blink { 50% { opacity: 0; } }
@keyframes dots { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---------- attachments ---------- */
.att-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 8px; }
.msg.user .att-grid { justify-content: flex-end; }
.att-card { position: relative; width: 148px; border-radius: 12px; overflow: hidden; background: var(--surface); border: 1px solid var(--border); }
.att-thumb { position: relative; height: 104px; background: var(--hover); overflow: hidden; }
.att-thumb img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.att-thumb .ph { display: grid; place-items: center; height: 100%; min-height: 104px; color: var(--muted); }
.att-thumb .ph .i { width: 24px; height: 24px; }
.att-card.busy .att-thumb { filter: brightness(.94); }
.att-cap { display: flex; align-items: center; gap: 7px; padding: 7px 9px; border-top: 1px solid var(--border); }
.att-ico { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 6px; flex-shrink: 0; background: var(--hover); color: var(--muted); }
.att-ico .i { width: 13px; height: 13px; }
.att-card.pdf .att-ico { background: #e5484d; color: #fff; }
.att-card.docx .att-ico { background: #2b6be6; color: #fff; }
.att-meta { min-width: 0; line-height: 1.3; }
.att-name { display: block; font-size: 12.5px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.att-meta small { display: block; color: var(--muted); font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
/* In a sent message the preview may use its full height instead of the composer's fixed crop. */
.msg .att-grid { margin-bottom: 10px; }
.msg .att-thumb { height: auto; }
.msg .att-thumb img { height: auto; max-height: 240px; object-fit: contain; }
.att-x {
  position: absolute; top: 6px; right: 6px; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%;
  background: var(--text); color: var(--bg); box-shadow: var(--shadow-sm); opacity: 0; transition: opacity .12s;
}
.att-x .i { width: 12px; height: 12px; stroke-width: 3; }
.att-card:hover .att-x { opacity: 1; }
.spinner { width: 18px; height: 18px; border-radius: 50%; border: 2px solid rgb(255 255 255 / .35); border-top-color: #fff; animation: spin .8s linear infinite; }
.att-thumb .spinner { border-color: var(--border-strong); border-top-color: var(--text); }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- composer ---------- */
#composer { width: 100%; max-width: 780px; margin: 0 auto; padding: 0 22px 10px; }
.composer-card {
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: 22px; padding: 10px 10px 8px 14px;
  box-shadow: var(--shadow); transition: border-color .15s, box-shadow .15s;
}
.composer-card:focus-within { border-color: var(--accent); box-shadow: var(--shadow), var(--ring); }
#attachments:not(:empty) { padding: 6px 0 4px; }
/* A folder-sized selection (e.g. from the Podcast Studio) must not push the text box off screen. */
#attachments { max-height: 316px; overflow-y: auto; scrollbar-width: thin; }
#attachments .att-grid { margin: 0; }
#input { display: block; width: 100%; resize: none; border: 0; outline: 0; background: transparent; max-height: 220px; padding: 6px 4px; line-height: 1.55; }
#input::placeholder { color: var(--muted); }
.composer-bar { display: flex; align-items: center; gap: 6px; margin-left: -6px; }
.bar-hint { flex: 1; font-size: 12px; color: var(--muted); opacity: .8; }
.send-btn {
  margin-left: auto; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent); color: #fff; transition: background .15s, transform .1s, opacity .15s;
}
.send-btn:hover:not(:disabled) { background: var(--accent-hi); }
.send-btn:active:not(:disabled) { transform: scale(.94); }
.send-btn:disabled { background: var(--border-strong); color: var(--muted); cursor: default; }
.send-btn.stop { background: var(--text); color: var(--bg); }
.send-btn.stop .i { fill: currentColor; width: 14px; height: 14px; }
.hint { text-align: center; color: var(--muted); font-size: 12px; margin: 8px 0 0; }

#dropzone {
  position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; pointer-events: none; opacity: 0;
  background: color-mix(in srgb, var(--accent) 12%, transparent); backdrop-filter: blur(4px); transition: opacity .15s;
}
#dropzone.show { opacity: 1; }
#dropzone > div {
  display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 34px 48px; border-radius: 22px;
  background: var(--surface); border: 2px dashed var(--accent); box-shadow: var(--shadow);
}
#dropzone .i { width: 34px; height: 34px; color: var(--accent); }
#dropzone small { color: var(--muted); }

/* ---------- settings dialog ---------- */
dialog {
  padding: 0; border: 1px solid var(--border); border-radius: 20px; background: var(--surface); color: var(--text);
  width: min(560px, calc(100vw - 32px)); box-shadow: 0 30px 80px -20px rgb(0 0 0 / .45);
}
dialog[open] { animation: pop .18s ease; }
dialog::backdrop { background: rgb(8 12 22 / .45); backdrop-filter: blur(3px); }
@keyframes pop { from { opacity: 0; transform: scale(.97) translateY(6px); } }
dialog [hidden] { display: none !important; }
.dlg-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 16px 0 22px; }
/* The title block must shrink, or a long title/subtitle pushes the close button out of the dialog. */
.dlg-head > div { min-width: 0; }
.dlg-head h2, .dlg-head h3 { margin: 0; font-size: 18px; font-weight: 700; letter-spacing: -.015em; }
.dlg-head p { margin: 4px 0 0; font-size: 13.5px; font-weight: 400; color: var(--muted); line-height: 1.45; overflow-wrap: anywhere; }
.tabs { display: flex; gap: 4px; padding: 12px 22px 0; border-bottom: 1px solid var(--border); }
.tabs button { padding: 8px 12px; font-size: 14px; font-weight: 500; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs button:hover { color: var(--text); }
.tabs button.on { color: var(--text); border-bottom-color: var(--accent); }
.dlg-body { padding: 18px 22px; max-height: min(62vh, 560px); overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
.dlg-body::-webkit-scrollbar { width: 8px; }
.dlg-body::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
.dlg-body::-webkit-scrollbar-track { background: transparent; }
.dlg-body label { display: block; margin-bottom: 14px; font-size: 13.5px; font-weight: 500; color: var(--text-2); }
.dlg-body input:not([type=checkbox]):not([type=radio]):not([type=range]), .dlg-body select, .dlg-body textarea {
  display: block; width: 100%; margin-top: 6px; padding: 9px 12px; border-radius: 10px;
  background: var(--bg); border: 1px solid var(--border); font-size: 14px; font-weight: 400; outline: 0;
  transition: border-color .15s, box-shadow .15s;
}
.dlg-body textarea { resize: vertical; }
.dlg-body :is(input, select, textarea):focus { border-color: var(--accent); box-shadow: var(--ring); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: start; }
.val { float: right; color: var(--muted); font-weight: 400; }
input[type=range] { width: 100%; margin-top: 10px; accent-color: var(--accent); }
.dlg-foot { display: flex; justify-content: flex-end; padding: 10px 22px 12px; border-top: 1px solid var(--border); background: var(--surface); border-radius: 0 0 16px 16px; }

/* Settings dialog: one fixed frame for every tab (no size jumping). The form
   fills the dialog; each pane scrolls inside the body when it must. */
#settings { width: min(700px, calc(100vw - 24px)); height: min(88vh, 680px); }
#settings form { display: flex; flex-direction: column; height: 100%; min-height: 0; overflow: hidden; }
#settings .dlg-body { flex: 1; min-height: 0; max-height: none; position: relative; padding: 14px 22px 16px; }
#settings .dlg-head { padding-top: 12px; }
#settings .dlg-body label { margin-bottom: 9px; }
#settings .dlg-body input:not([type=checkbox]):not([type=radio]):not([type=range]), #settings .dlg-body select, #settings .dlg-body textarea { padding: 8px 12px; margin-top: 4px; }
/* Soft fade at the bottom of the scroll area: a cut-off field reads as "scroll for more". */
#settings .dlg-body::after { content: ""; position: sticky; bottom: 0; display: block; height: 14px; margin: 0 -22px -14px; background: linear-gradient(transparent, var(--surface)); pointer-events: none; }
/* The dialog itself takes focus on open, so buttons get a quiet ring for keyboard users instead of the default autofocus outline on the close button. */
#settings button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.switch { display: flex !important; align-items: center; gap: 12px; cursor: pointer; color: var(--text) !important; }
.switch input { position: absolute; opacity: 0; }
.switch .track { position: relative; width: 40px; height: 23px; border-radius: 999px; background: var(--border-strong); flex-shrink: 0; transition: background .2s; }
.switch .track::after { content: ""; position: absolute; top: 3px; left: 3px; width: 17px; height: 17px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgb(0 0 0 / .3); transition: transform .2s; }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(17px); }
.switch input:focus-visible + .track { box-shadow: var(--ring); }
.note { color: var(--muted); font-size: 13px; margin: 0 0 12px; }
#memList { max-height: 240px; overflow-y: auto; border: 1px solid var(--border); border-radius: 12px; background: var(--bg); }
#memList .none { padding: 18px; color: var(--muted); font-size: 13.5px; text-align: center; }
.mem { display: flex; gap: 10px; align-items: flex-start; padding: 9px 8px 9px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
.mem:last-child { border-bottom: 0; }
.mem span { flex: 1; padding-top: 3px; }
.mem .icon-btn { width: 28px; height: 28px; }
.mem .icon-btn .i { width: 15px; height: 15px; }
.mem .icon-btn:hover { color: var(--danger); }
.memadd { display: flex; gap: 8px; margin: 10px 0 6px; }
.memadd input { margin-top: 0 !important; }

/* ---------- toast ---------- */
#toast {
  position: fixed; bottom: 110px; left: 50%; transform: translate(-50%, 8px); z-index: 60;
  display: flex; align-items: center; gap: 8px; padding: 8px 16px; border-radius: 999px;
  background: var(--text); color: var(--bg); font-size: 13px; font-weight: 500; box-shadow: var(--shadow);
  opacity: 0; transition: opacity .2s, transform .2s; pointer-events: none;
}
#toast .i { width: 15px; height: 15px; color: var(--gold); }
#toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- mobile ---------- */
@media (max-width: 800px) {
  #sidebar { position: fixed; inset: 0 auto 0 0; z-index: 30; transform: translateX(-100%); transition: transform .22s ease; box-shadow: var(--shadow); }
  #sidebar.open { transform: none; }
  #scrim { display: block; position: fixed; inset: 0; z-index: 25; background: rgb(8 12 22 / .4); opacity: 0; pointer-events: none; transition: opacity .2s; }
  #sidebar.open + #scrim { opacity: 1; pointer-events: auto; }
  #menu { display: inline-grid; margin-left: -8px; }
  .topbar { padding: 10px 14px; }
  #thread { padding: 20px 16px 8px; }
  #composer { padding: 0 12px calc(8px + env(safe-area-inset-bottom)); }
  .suggestions { grid-template-columns: 1fr; }
  .hero { padding-top: 5vh; }
  .hero h1 { font-size: 25px; }
  .bar-hint, .msg .avatar { display: none; }
  .grid2 { grid-template-columns: 1fr; gap: 0; }
  .actions { opacity: 1; }
}

/* ================= minimal overrides ================= */
#sidebar { border-right: 0; padding: 12px 10px; gap: 4px; }
.brand { padding: 4px 8px 10px; gap: 8px; }
.brand .logo { width: 22px; height: 22px; }
.brand-name { font-size: 16px; font-weight: 600; }
.brand-name b { font-weight: 600; color: inherit; }

.btn-new { background: none; border: 0; box-shadow: none; font-weight: 500; padding: 8px 10px; }
.btn-new:hover { background: var(--hover); border: 0; box-shadow: none; }
.btn-new .i { color: inherit; width: 16px; height: 16px; }
.search { padding: 0 10px; }
.search:focus-within { background: var(--hover); border-color: transparent; }

.group-label { text-transform: none; letter-spacing: 0; font-weight: 500; font-size: 12px; padding: 16px 10px 4px; }
.chat-item { padding: 7px 10px; }
.chat-item.active { background: var(--hover); box-shadow: none; font-weight: 400; }
.chat-item.active::before { display: none; }

.user-row { border-top: 0; border-radius: 10px; padding: 8px; }
.user-avatar { background: var(--hover); color: var(--text); width: 30px; height: 30px; font-size: 13px; }
.user-text small { display: none; }

.topbar { border-bottom: 0; background: transparent; backdrop-filter: none; height: 52px; }
.topbar h2 { font-weight: 500; color: var(--muted); font-size: 14px; }
.model-pill { border: 0; background: none; padding: 0; color: var(--muted); font-size: 13px; }
.eu-dot { display: none; }

.hero { padding-top: 22vh; }
.hero .logo { display: none; }
.hero h1 { font-size: 26px; font-weight: 600; letter-spacing: -.02em; }
.hero p { display: none; }
.suggestions { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 26px; max-width: 640px; }
.suggestion { align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px; box-shadow: none; background: none; font-size: 13.5px; color: var(--text-2); }
.suggestion:hover { transform: none; box-shadow: none; background: var(--hover); border-color: var(--border); }
.suggestion .ico { width: auto; height: auto; background: none; color: var(--muted); }
.suggestion .ico .i { width: 16px; height: 16px; }
.suggestion strong { font-weight: 400; font-size: 13.5px; }
.suggestion small { display: none; }

.msg { gap: 0; margin-bottom: 30px; }
.avatar { display: none; }
.msg.user .bubble { border-radius: 18px; }
.md a { border-bottom: 0; text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.md blockquote { border-left-color: var(--border-strong); }
.codeblock { border: 0; }
.code-head { background: transparent; border-bottom: 1px solid rgb(255 255 255 / .06); }

.composer-card { border: 1px solid var(--border); border-radius: 24px; box-shadow: none; padding: 8px 8px 8px 14px; }
.composer-card:focus-within { border-color: var(--border-strong); box-shadow: none; }
.bar-hint { display: none; }
.send-btn { width: 34px; height: 34px; background: var(--ink); color: var(--bg); }
.send-btn:hover:not(:disabled) { background: var(--ink); opacity: .85; }
.send-btn:disabled { background: var(--hover); color: var(--muted); }
.hint { font-size: 11.5px; opacity: .8; }

.att-grid { gap: 8px; }

#dropzone { background: color-mix(in srgb, var(--bg) 70%, transparent); }
#dropzone > div { box-shadow: none; border: 1.5px dashed var(--border-strong); }
#dropzone .i { color: var(--muted); }

dialog { box-shadow: 0 20px 60px -20px rgb(0 0 0 / .35); border-radius: 16px; }
.tabs button.on { border-bottom-color: var(--ink); }
.btn.primary { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.btn.primary:hover { background: var(--ink); opacity: .85; }
.switch input:checked + .track { background: var(--ink); }
.switch .track::after { background: var(--bg); }
.dlg-body input:not([type=checkbox]):not([type=radio]):not([type=range]), .dlg-body select, .dlg-body textarea { background: transparent; }
.dlg-body :is(input, select, textarea):focus { border-color: var(--border-strong); }
input[type=range] { accent-color: var(--ink); }
#toast .i { color: inherit; }
.att-name { font-weight: 500; }
#input { overflow: hidden; scrollbar-width: thin; }

/* ---------- web search ---------- */
.tool-btn {
  display: inline-flex; align-items: center; gap: 6px; height: 32px; padding: 0 12px 0 10px; border-radius: 999px;
  border: 1px solid transparent; color: var(--muted); font-size: 13px; transition: background .15s, color .15s, border-color .15s;
}
.tool-btn .i { width: 16px; height: 16px; }
.tool-btn:hover { background: var(--hover); color: var(--text); }
.tool-btn.on { color: var(--text); border-color: var(--border); background: var(--hover); }
.web-status { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-size: 13px; color: var(--muted); }
.web-status .i { width: 15px; height: 15px; }
.web-status span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.web-status.active span { background: linear-gradient(90deg, var(--muted) 0%, var(--text) 50%, var(--muted) 100%) 0 0 / 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: shimmer 1.6s linear infinite; }
@keyframes shimmer { to { background-position: -200% 0; } }
.md sup.cite { line-height: 0; }
.md sup.cite a { display: inline-block; min-width: 16px; padding: 0 4px; margin-left: 2px; border-radius: 6px; background: var(--hover); color: var(--muted); font-size: 10.5px; font-weight: 600; line-height: 16px; text-align: center; text-decoration: none; vertical-align: 2px; }
.md sup.cite a:hover { color: var(--text); }
.md.streaming > :last-child::after { vertical-align: -2px; }
.sources { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.src { display: inline-flex; align-items: center; gap: 6px; max-width: 220px; padding: 3px 10px 3px 4px; border: 1px solid var(--border); border-radius: 999px; font-size: 12.5px; color: var(--text-2); text-decoration: none; transition: background .12s; }
.src:hover { background: var(--hover); }
.src b { display: grid; place-items: center; min-width: 18px; height: 18px; border-radius: 50%; background: var(--hover); font-size: 10.5px; font-weight: 600; color: var(--muted); }
.src span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- reasoning ---------- */
.thinking { margin-bottom: 10px; font-size: 13px; color: var(--muted); }
.thinking summary { cursor: pointer; list-style: none; display: inline-flex; align-items: center; gap: 6px; user-select: none; }
.thinking summary::-webkit-details-marker { display: none; }
.thinking summary::after { content: ""; width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(-45deg); transition: transform .15s; margin-left: 2px; }
.thinking[open] summary::after { transform: rotate(45deg); }
.thinking summary:hover { color: var(--text); }
.thinking.active summary { background: linear-gradient(90deg, var(--muted) 0%, var(--text) 50%, var(--muted) 100%) 0 0 / 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: shimmer 1.6s linear infinite; }
.think-body { margin: 8px 0 4px; padding-left: 12px; border-left: 2px solid var(--border); white-space: pre-wrap; line-height: 1.55; max-height: 320px; overflow-y: auto; }

/* ================= v2: school edition ================= */
.brand { flex-wrap: wrap; row-gap: 0; }
.brand-org { flex-basis: 100%; padding-left: 30px; font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.assistant-item .i { width: 15px; height: 15px; color: var(--muted); flex-shrink: 0; }
#assistantList:not(:empty) { margin-bottom: 4px; }

.user-wrap { position: relative; }
.user-row { width: 100%; }
.user-text small { display: block !important; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.popover {
  position: absolute; bottom: calc(100% + 6px); left: 0; right: 0; z-index: 40; padding: 6px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 12px 32px -12px rgb(0 0 0 / .35);
}
.popover > * { display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 10px; border-radius: 8px; font-size: 14px; color: var(--text); text-decoration: none; }
.popover > *:hover { background: var(--hover); }
.popover .i { width: 16px; height: 16px; color: var(--muted); }

.mode-pick { position: relative; display: inline-flex; align-items: center; }
.mode-pick select {
  appearance: none; -webkit-appearance: none; border: 1px solid transparent; background: transparent; color: var(--muted);
  font-size: 13px; font-weight: 500; padding: 5px 26px 5px 10px; border-radius: 8px; cursor: pointer; outline: none;
}
.mode-pick select:hover, .mode-pick select:focus { background: var(--hover); color: var(--text); }
.mode-pick .i { position: absolute; right: 7px; width: 14px; height: 14px; color: var(--muted); pointer-events: none; }

.hero-badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 999px; background: var(--hover); color: var(--muted); font-size: 12.5px; font-weight: 500; margin-bottom: 14px; }
.hero-badge .i { width: 14px; height: 14px; }
.hero .hero-sub { display: block !important; max-width: 520px; margin: 10px auto 0; color: var(--muted); font-size: 15px; }
.assistant-banner { display: flex; align-items: center; justify-content: center; gap: 6px; margin: -8px 0 24px; font-size: 12.5px; color: var(--muted); }
.assistant-banner .i { width: 14px; height: 14px; }
.model-tag { margin-left: 6px; font-size: 11.5px; color: var(--muted); opacity: .8; cursor: default; }

.usage-meter { padding: 14px; border: 1px solid var(--border); border-radius: 12px; margin-bottom: 16px; }
.usage-head { display: flex; justify-content: space-between; font-size: 14px; margin-bottom: 8px; }
.usage-meter .bar { height: 6px; border-radius: 6px; background: var(--hover); overflow: hidden; }
.usage-meter .bar span { display: block; height: 100%; background: var(--ink); border-radius: 6px; }
.usage-meter small { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; }
.privacy-facts p { font-size: 13.5px; color: var(--text-2); margin: 0 0 10px; }
#exportBtn .i { width: 16px; height: 16px; }
#toast.error .i { color: var(--danger); }

/* ---------- onboarding ---------- */
#onboard { position: fixed; inset: 0; z-index: 80; display: grid; place-items: center; padding: 16px;
  background: color-mix(in srgb, var(--bg) 70%, transparent); backdrop-filter: blur(6px); animation: rise .25s ease both; }
.ob-sheet { width: min(720px, 100%); max-height: min(92vh, 900px); display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: 20px; box-shadow: 0 30px 80px -20px rgb(0 0 0 / .45); }
.ob-head { display: flex; justify-content: space-between; align-items: center; padding: 22px 26px 0; }
.ob-head .logo { width: 30px; height: 30px; }
.ob-sheet h1 { margin: 14px 26px 4px; font-size: 24px; font-weight: 600; letter-spacing: -.02em; }
.ob-sub { margin: 0 26px 6px; color: var(--muted); font-size: 14.5px; }
.ob-body { overflow-y: auto; padding: 4px 26px 8px; }
.ob-section { padding: 16px 0 6px; }
.ob-section h2 { font-size: 14.5px; font-weight: 600; margin: 0 0 4px; }
.ob-section > p { margin: 0 0 10px; }
.ob-area { font-size: 12px; color: var(--muted); margin: 12px 0 6px; }
.ob-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.ob-card { text-align: left; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; transition: border-color .12s, background .12s; }
.ob-card:hover { background: var(--hover); }
.ob-card small { display: block; color: var(--muted); font-size: 11.5px; margin-bottom: 3px; }
.ob-card b { font-weight: 500; font-size: 13.5px; line-height: 1.45; }
.ob-card.on, .ob-chip.on { border-color: var(--ink); background: var(--hover); box-shadow: inset 0 0 0 1px var(--ink); }
.ob-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.ob-chip { padding: 6px 13px; border: 1px solid var(--border); border-radius: 999px; font-size: 13.5px; transition: background .12s, border-color .12s; }
.ob-chip:hover { background: var(--hover); }
.ob-chips.small .ob-chip { font-size: 12.5px; padding: 5px 11px; }
.ob-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 26px 20px; border-top: 1px solid var(--border); }
.ob-hint { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.school-profile { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 12px 14px; margin-bottom: 12px; border: 1px solid var(--border); border-radius: 12px; }
.school-profile b { display: block; font-size: 14px; }
.school-profile small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 4px; line-height: 1.5; }
.school-profile .btn { flex-shrink: 0; margin-top: 2px; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; border-radius: 8px; }
@media (max-width: 600px) { .ob-sheet h1 { font-size: 21px; } .ob-head, .ob-body, .ob-foot { padding-left: 18px; padding-right: 18px; } .ob-sheet h1, .ob-sub { margin-left: 18px; margin-right: 18px; } }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* ---------- onboarding wizard ---------- */
.ob-sheet { height: min(660px, 92vh); }
.ob-head { gap: 14px; padding-bottom: 4px; }
.ob-progress { flex: 1; height: 4px; border-radius: 4px; background: var(--hover); overflow: hidden; }
.ob-progress span { display: block; height: 100%; background: var(--ink); border-radius: 4px; transition: width .35s cubic-bezier(.4, 0, .2, 1); }
.ob-step { min-width: 34px; text-align: right; font-variant-numeric: tabular-nums; }
.ob-stage { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.ob-stage.in-fwd { animation: obIn .32s cubic-bezier(.2, .8, .2, 1) both; }
.ob-stage.in-back { animation: obBack .32s cubic-bezier(.2, .8, .2, 1) both; }
@keyframes obIn { from { opacity: 0; transform: translateX(24px); } }
@keyframes obBack { from { opacity: 0; transform: translateX(-24px); } }
.ob-sheet h1 { margin-top: 18px; }
.ob-body { flex: 1; padding-top: 14px; }
#onboard.out { animation: obOut .2s ease both; }
@keyframes obOut { to { opacity: 0; } }

.ob-options { display: flex; flex-direction: column; gap: 8px; max-width: 460px; }
.ob-options.big { flex-direction: row; max-width: none; }
.ob-options.big .ob-option { flex: 1; flex-direction: column; align-items: flex-start; padding: 18px; }
.ob-options.big .ob-option b { font-size: 22px; }
.ob-option { position: relative; display: flex; align-items: center; gap: 12px; padding: 13px 16px; text-align: left;
  border: 1px solid var(--border); border-radius: 14px; transition: border-color .15s, background .15s, transform .1s; }
.ob-option:hover { background: var(--hover); }
.ob-option:active { transform: scale(.99); }
.ob-option > .i { width: 20px; height: 20px; color: var(--muted); }
.ob-option b { display: block; font-weight: 500; font-size: 15px; }
.ob-option small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.ob-option.on { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); background: var(--hover); }
.ob-check { position: absolute; top: 10px; right: 10px; display: grid; place-items: center; width: 20px; height: 20px; border-radius: 50%;
  background: var(--ink); color: var(--bg); opacity: 0; transform: scale(.6); transition: opacity .15s, transform .15s; }
.ob-check .i { width: 12px; height: 12px; stroke-width: 3; }
.ob-option.on .ob-check, .ob-card.on .ob-check { opacity: 1; transform: none; }
.ob-option .ob-check { position: static; margin-left: auto; }
.ob-options.big .ob-check { position: absolute; }

.ob-tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 14px; }
.ob-tabs button { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: 999px; font-size: 13.5px; color: var(--muted); border: 1px solid transparent; }
.ob-tabs button:hover { color: var(--text); background: var(--hover); }
.ob-tabs button.on { color: var(--text); border-color: var(--border-strong); background: var(--hover); font-weight: 500; }
.ob-tabs .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ink); }
.ob-card { position: relative; padding: 14px 14px 16px; transition: border-color .15s, background .15s, transform .1s; }
.ob-card:active { transform: scale(.98); }
.ob-card b { font-size: 15px; line-height: 1.6; }

.ob-counter { display: inline-block; font-size: 12.5px; color: var(--muted); padding: 3px 10px; border-radius: 999px; background: var(--hover); }
.ob-group { font-size: 12px; color: var(--muted); margin: 14px 0 0; }
.ob-chip { transition: background .12s, border-color .12s, transform .1s; }
.ob-chip:active { transform: scale(.96); }

.ob-summary { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
.ob-summary > div { display: grid; grid-template-columns: 150px 1fr auto; gap: 12px; align-items: baseline; padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 14px; }
.ob-summary > div:last-child { border-bottom: 0; }
.ob-summary .k { color: var(--muted); }
.ob-summary .btn-link { font-size: 13px; }

.btn.ghost { border-color: transparent; background: none; color: var(--muted); }
.btn.ghost:hover { color: var(--text); background: var(--hover); }
.btn:disabled, .btn.primary:disabled { opacity: .35; cursor: not-allowed; }
@media (max-width: 600px) {
  .ob-options.big { flex-direction: column; }
  .ob-summary > div { grid-template-columns: 1fr auto; }
  .ob-summary .k { grid-column: 1 / -1; font-size: 12.5px; }
}
.ob-chips.big .ob-chip { padding: 12px 26px; font-size: 16px; border-radius: 14px; }

/* ---------- projects ---------- */
.group-label.with-action { display: flex; align-items: center; justify-content: space-between; padding-right: 4px; }
.icon-btn.tiny { width: 24px; height: 24px; border-radius: 7px; }
.icon-btn.tiny .i { width: 14px; height: 14px; }
.chat-item.folder { gap: 6px; color: var(--text); }
.chat-item.folder > .i { width: 15px; height: 15px; color: var(--muted); flex-shrink: 0; }
.chat-item.folder .fname { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-item.folder small { color: var(--muted); font-size: 11.5px; }
.chev { display: grid; place-items: center; width: 14px; color: var(--muted); }
.chev .i { width: 13px; height: 13px; transform: rotate(-90deg); transition: transform .15s; }
.chev.open .i { transform: none; }
.chat-item.nested { padding-left: 34px; font-size: 13.5px; }
.chat-item.new-in { color: var(--muted); gap: 6px; }
.chat-item.new-in .i { width: 13px; height: 13px; }
.popover.floating { position: fixed; bottom: auto; right: auto; width: 220px; max-height: 320px; overflow-y: auto; z-index: 90; }
.popover.floating > button > .i:last-child:not(:first-child) { margin-left: auto; color: var(--text); }
.popover.floating span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: left; }

/* ---------- document citations ---------- */
.md a.dcite { display: inline-flex; align-items: center; gap: 4px; margin: 0 2px; padding: 1px 8px 1px 6px; border-radius: 999px; border: 0;
  background: color-mix(in srgb, #facc15 22%, transparent); color: var(--text); font-size: 12px; font-weight: 500; text-decoration: none; vertical-align: 1px; line-height: 1.6; cursor: pointer; }
.md a.dcite:hover { background: color-mix(in srgb, #facc15 40%, transparent); }
.md a.dcite .i { width: 12px; height: 12px; }
#docPanel { position: fixed; top: 0; right: 0; bottom: 0; width: min(560px, 100vw); z-index: 70; display: flex; flex-direction: column;
  background: var(--surface); border-left: 1px solid var(--border); box-shadow: -20px 0 50px -20px rgb(0 0 0 / .4); transform: translateX(100%); transition: transform .25s cubic-bezier(.2, .8, .2, 1); }
#docPanel.open { transform: none; }
.doc-head { display: flex; align-items: center; gap: 10px; padding: 14px 14px 12px 18px; border-bottom: 1px solid var(--border); }
.doc-ico { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: color-mix(in srgb, #facc15 22%, transparent); }
.doc-ico .i { width: 17px; height: 17px; }
.doc-title { flex: 1; min-width: 0; line-height: 1.3; }
.doc-title b { display: block; font-weight: 600; font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-title small { color: var(--muted); font-size: 12px; }
.doc-quotes { display: flex; flex-direction: column; gap: 4px; padding: 10px 14px; border-bottom: 1px solid var(--border); max-height: 34%; overflow-y: auto; }
.doc-quote { display: flex; align-items: flex-start; gap: 8px; text-align: left; padding: 6px 8px; border-radius: 9px; font-size: 13px; }
.doc-quote:hover, .doc-quote.active { background: var(--hover); }
.doc-quote .n { display: grid; place-items: center; min-width: 20px; height: 20px; border-radius: 50%; background: #facc15; color: #111; font-size: 11px; font-weight: 600; }
.doc-quote .q { flex: 1; color: var(--text-2); }
.doc-quote .p { color: var(--muted); font-size: 11.5px; white-space: nowrap; }
.doc-quote.missing { opacity: .55; }
.doc-text { flex: 1; overflow-y: auto; padding: 18px 22px 40px; white-space: pre-wrap; font: 14px/1.7 Georgia, "Times New Roman", serif; color: var(--text-2); }
.doc-text .page-sep { font: 600 11.5px var(--font); color: var(--muted); border-top: 1px solid var(--border); margin: 14px 0 4px; padding-top: 8px; white-space: normal; }
.doc-text strong { font-family: var(--font); color: var(--text); }
.doc-text strong.h1 { font-size: 1.2em; } .doc-text strong.h2 { font-size: 1.1em; }
mark.hl { background: #fde047; color: #111; border-radius: 3px; padding: 1px 2px; box-decoration-break: clone; -webkit-box-decoration-break: clone; transition: box-shadow .2s; }
mark.hl.active { box-shadow: 0 0 0 3px #f59e0b; }

/* ---------- onboarding: classes ---------- */
.ob-classes { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 14px; }
.ob-classes .ob-chip { display: inline-flex; align-items: center; gap: 6px; padding-right: 6px; }
.ob-classes .ob-chip button { display: grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; color: var(--muted); }
.ob-classes .ob-chip button:hover { background: var(--border); color: var(--text); }
.ob-classes .ob-chip .i { width: 11px; height: 11px; stroke-width: 3; }
.ob-addclass { display: flex; gap: 8px; max-width: 520px; }
.ob-addclass input, .ob-addclass select { padding: 9px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font: inherit; font-size: 14px; outline: 0; }
.ob-addclass input { flex: 1; min-width: 0; }
.ob-addclass input:focus, .ob-addclass select:focus { border-color: var(--border-strong); }

/* ---------- math ---------- */
.md .katex { font-size: 1.08em; }
.md .math-block { overflow-x: auto; overflow-y: hidden; margin: 10px 0 14px; padding: 4px 0; }
.md .math-block .katex-display { margin: 0; }
.math-status { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 10px; font-size: 13px; color: var(--muted); }
.math-status .i { width: 15px; height: 15px; }
.math-status code.calc { font: 12.5px var(--mono); background: var(--hover); color: var(--text-2); padding: 2px 8px; border-radius: 7px; }
.graph { margin: 4px 0 16px; border: 1px solid var(--border); border-radius: 14px; padding: 10px 10px 8px; background: var(--surface); }
.graph-svg { display: block; width: 100%; height: auto; }
.graph-svg .grid { stroke: var(--border); stroke-width: 1; }
.graph-svg .axis { stroke: var(--muted); stroke-width: 1.4; }
.graph-svg .tick { fill: var(--muted); font: 11px var(--font); }
.graph-svg .pt { fill: var(--text); }
.graph-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; padding: 6px 6px 2px; font-size: 13px; color: var(--text-2); }
.graph-legend span { display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: 12.5px; }
.graph-legend i { width: 14px; height: 3px; border-radius: 2px; }
.graph-loading, .graph-error { padding: 24px; text-align: center; color: var(--muted); font-size: 13px; }
.ob-addclass select.lvl { width: 64px; }
.mem-tag { display: inline-flex; align-items: center; gap: 4px; margin-right: 6px; padding: 1px 7px; border-radius: 999px; background: var(--hover); color: var(--muted); font-size: 11.5px; vertical-align: 1px; }
.mem-tag .i { width: 11px; height: 11px; }
.mem-kind.preference { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--text); }
.mem-kind.learning { background: color-mix(in srgb, #16a34a 16%, transparent); color: var(--text); }
.mem-edit { flex: 1; min-width: 0; }
.md.stale { opacity: .45; transition: opacity .2s; }
.rewrite-note { display: inline-flex; align-items: center; gap: 6px; margin: 0 0 8px; padding: 3px 10px; border-radius: 999px; font-size: 12.5px; color: var(--muted); background: var(--hover); }
.memadd select { flex: 0 0 auto; max-width: 42%; }

/* ---------- sidebar v3: fag, collapsible sections, resizable ---------- */
#sidebar { width: var(--side-w, 272px); }
/* position:relative anchors #sideResize. Desktop only: the max-width:800px
   block takes the sidebar out of flow (position:fixed). An unconditional
   position:relative here wins the cascade, so a snapped half-screen window
   keeps a blank sidebar-width gap and shoves the chat into the rest. */
@media (min-width: 801px) {
  #sidebar { position: relative; }
}
@media (max-width: 800px) {
  #sidebar { width: min(var(--side-w, 272px), 88vw); }
  #sideResize { display: none; }
}
#sideResize { position: absolute; top: 0; right: -3px; bottom: 0; width: 6px; cursor: col-resize; z-index: 5; }
#sideResize:hover, body.resizing #sideResize { background: color-mix(in srgb, var(--accent) 35%, transparent); }
body.resizing { cursor: col-resize; user-select: none; }
.group-label.section { display: flex; align-items: center; justify-content: space-between; padding: 12px 4px 2px 4px; }
.sec-toggle { display: inline-flex; align-items: center; gap: 4px; padding: 3px 6px; border-radius: 7px; color: var(--muted); font: 500 12px var(--font); }
.sec-toggle:hover { background: var(--hover); color: var(--text); }
.sec-toggle .i { width: 13px; height: 13px; transition: transform .15s; }
.group-label.closed .sec-toggle .i { transform: rotate(-90deg); }
/* rows: title takes all space; the action icons fade in over the counts, so
   hovering never reflows the row and every button is the same size */
.chat-item { gap: 6px; }
.chat-item > span.title, .chat-item .fname { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-item .chev { flex: none; }
.chat-item .count { flex: none; color: var(--muted); font-size: 11.5px; font-variant-numeric: tabular-nums; transition: opacity .12s; }
.chat-item .fcount { display: inline-flex; align-items: center; gap: 4px; padding: 1px 7px 1px 6px; border-radius: 999px; background: var(--border); font-size: 11px; }
.chat-item .fcount .i { width: 12px; height: 12px; }
.chat-item:hover .count { opacity: 0; }
.chat-item .row-actions {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  display: flex; flex: none; align-items: center; gap: 4px; padding-left: 20px;
  background: linear-gradient(90deg, transparent, var(--hover) 22px);
  opacity: 0; pointer-events: none; transition: opacity .12s;
}
.chat-item:hover .row-actions { opacity: 1; pointer-events: auto; }
.chat-item .row-actions button { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 7px; color: var(--muted); transition: background .12s, color .12s; }
.chat-item .row-actions .i { width: 15px; height: 15px; }
.chat-item .row-actions button:hover { background: color-mix(in srgb, var(--text) 12%, transparent); color: var(--text); }
.chat-item .row-actions .del:hover { color: var(--danger); }
/* Touch screens have no hover: keep the actions permanently visible there. */
@media (hover: none) {
  .chat-item .row-actions { position: static; transform: none; opacity: 1; pointer-events: auto; padding-left: 0; background: none; gap: 2px; }
  .chat-item .row-actions button { width: 22px; height: 22px; }
  .chat-item .count { display: none; }
}
.chat-item.folder { padding-left: 6px; }
.chat-item.nested { padding-left: 30px; }
.assistant-item > span { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- document panel v2: original PDF/Word ---------- */
#docPanel { width: min(720px, 60vw); }
#docPanel.resizing { transition: none; user-select: none; }
.doc-resize { position: absolute; top: 0; left: -3px; bottom: 0; width: 6px; cursor: col-resize; z-index: 2; }
.doc-resize:hover { background: color-mix(in srgb, var(--accent) 35%, transparent); }
.doc-modes { display: inline-flex; padding: 2px; border-radius: 9px; background: var(--hover); }
.doc-modes button { padding: 4px 10px; border-radius: 7px; font-size: 12.5px; color: var(--muted); }
.doc-modes button.on { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.doc-body { flex: 1; overflow-y: auto; min-height: 0; background: var(--bg); }
.doc-body .doc-text { overflow: visible; background: var(--surface); min-height: 100%; }
.doc-loading { padding: 40px; text-align: center; color: var(--muted); font-size: 13px; }
.pdf-pages { display: flex; flex-direction: column; gap: 12px; padding: 14px; }
.pdf-page { position: relative; width: 100%; background: #fff; border-radius: 4px; box-shadow: 0 1px 4px rgb(0 0 0 / .25); overflow: hidden; }
.pdf-page canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.pdf-hl { position: absolute; z-index: 1; background: rgb(253 224 71 / .45); mix-blend-mode: multiply; border-radius: 2px; pointer-events: none; transition: box-shadow .2s; }
.pdf-hl.active { background: rgb(250 204 21 / .6); box-shadow: 0 0 0 2px #f59e0b; }
/* Scanned page where the exact words couldn't be located: frame the page instead of covering it. */
.pdf-hl.approx { background: none; mix-blend-mode: normal; box-shadow: inset 0 0 0 3px rgb(250 204 21 / .9); }
.doc-paper { max-width: 780px; margin: 14px auto; padding: 40px 48px; background: #fff; color: #111; border-radius: 4px; box-shadow: 0 1px 4px rgb(0 0 0 / .25);
  font: 15px/1.6 Georgia, "Times New Roman", serif; }
.doc-paper img { max-width: 100%; height: auto; }
.doc-paper table { border-collapse: collapse; } .doc-paper td, .doc-paper th { border: 1px solid #ccc; padding: 4px 8px; }
.doc-paper mark.hl { background: #fde047; }
@media (max-width: 800px) { #docPanel { width: 100vw !important; } .doc-resize { display: none; } .doc-paper { padding: 22px; } }

/* ---------- composer: fag picker + tools ---------- */
.composer-top { display: flex; margin: -2px 0 2px -4px; }
.fag-pick { display: inline-flex; align-items: center; gap: 6px; max-width: 100%; padding: 3px 8px 3px 6px; border-radius: 8px; font-size: 12.5px; color: var(--muted); }
.fag-pick:hover { background: var(--hover); color: var(--text); }
.fag-pick.set { color: var(--text); }
.fag-pick .i { width: 14px; height: 14px; flex: none; }
.fag-pick span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tool-chip { display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 4px 0 10px; border-radius: 999px; background: var(--hover); border: 1px solid var(--border); font-size: 12.5px; color: var(--text); }
.tool-chip[hidden] { display: none; }
.tool-chip > .i { width: 14px; height: 14px; }
.tool-chip button { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; color: var(--muted); }
.tool-chip button:hover { background: var(--border); color: var(--text); }
.tool-chip button .i { width: 12px; height: 12px; }
.popover.floating { width: 260px; }
.popover.floating small { display: block; font-size: 11.5px; color: var(--muted); margin-top: 1px; }
.popover.floating > button { align-items: flex-start; }
.popover.floating > button > .i:first-child { margin-top: 2px; }
.pop-sep { height: 1px; background: var(--border); margin: 4px 6px; }
.chat-item.empty-folder { color: var(--muted); font-size: 12.5px; cursor: default; }
.chat-item.empty-folder:hover { background: none; }

/* ---------- quiz ---------- */
.qz-badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; background: var(--hover); font-size: 12.5px; font-weight: 600; }
.qz-badge .i { width: 14px; height: 14px; }
.ob-foot .ob-hint { flex: 1; text-align: center; }
.qz-bar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.qz-topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 8px; margin-bottom: 14px; }
.qz-topic { position: relative; text-align: left; padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px; transition: border-color .15s, background .15s, transform .1s; }
.qz-topic:hover { background: var(--hover); }
.qz-topic:active { transform: scale(.98); }
.qz-topic b { display: block; font-weight: 500; font-size: 14px; padding-right: 22px; }
.qz-topic small { display: block; color: var(--muted); font-size: 12px; margin-top: 2px; }
.qz-topic.on { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); background: var(--hover); }
.qz-topic.on .ob-check { opacity: 1; transform: none; }
.qz-refresh { display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; }
.qz-refresh .i { width: 13px; height: 13px; }
.qz-skeleton { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 8px; }
.qz-skeleton span { height: 58px; border-radius: 12px; background: linear-gradient(90deg, var(--hover) 0%, var(--border) 50%, var(--hover) 100%) 0 0 / 200% 100%; animation: shimmer 1.4s linear infinite; }
.qz-label { font-size: 13px; font-weight: 600; margin: 16px 0 8px; }
.qz-label:first-child { margin-top: 2px; }
.qz-seg { display: flex; gap: 6px; flex-wrap: wrap; }
.qz-seg button { flex: 1; min-width: 70px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; text-align: center; transition: background .12s, border-color .12s; }
.qz-seg button:hover { background: var(--hover); }
.qz-seg button b { display: block; font-weight: 500; font-size: 14px; }
.qz-seg button small { display: block; color: var(--muted); font-size: 11.5px; margin-top: 2px; }
.qz-seg button.on { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); background: var(--hover); }
.qz-adaptive { margin-top: 18px; align-items: flex-start !important; }
.qz-adaptive b { display: block; font-weight: 500; font-size: 14px; }
.qz-adaptive small { display: block; color: var(--muted); font-size: 12.5px; }

.quiz-card { margin: 6px 0 16px; padding: 16px 18px 14px; border: 1px solid var(--border); border-radius: 16px; background: var(--surface); }
.qc-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); }
.qc-n { font-weight: 600; color: var(--text); }
.qc-topic { padding: 2px 9px; border-radius: 999px; background: var(--hover); }
.qc-diff { padding: 2px 9px; border-radius: 999px; font-weight: 500; }
.qc-diff.easy { background: color-mix(in srgb, #16a34a 16%, transparent); color: #16a34a; }
.qc-diff.medium { background: color-mix(in srgb, #d97706 16%, transparent); color: #d97706; }
.qc-diff.hard { background: color-mix(in srgb, #dc2626 16%, transparent); color: #dc2626; }
.qc-score { margin-left: auto; display: inline-flex; align-items: center; gap: 4px; font-variant-numeric: tabular-nums; }
.qc-score .i { width: 13px; height: 13px; color: #16a34a; }
.qc-progress { height: 4px; border-radius: 4px; background: var(--hover); margin: 10px 0 14px; overflow: hidden; }
.qc-progress span { display: block; height: 100%; background: var(--ink); border-radius: 4px; transition: width .4s; }
.qc-q { font-size: 16px; font-weight: 500; line-height: 1.5; margin-bottom: 12px; }
.qc-answers { display: flex; flex-direction: column; gap: 8px; }
.qc-opt { display: flex; align-items: center; gap: 12px; text-align: left; padding: 11px 14px; border: 1px solid var(--border); border-radius: 12px; transition: background .12s, border-color .12s, transform .1s; }
.qc-opt:hover:not(:disabled) { background: var(--hover); border-color: var(--border-strong); }
.qc-opt:active:not(:disabled) { transform: scale(.99); }
.qc-opt:disabled { cursor: default; }
.qc-opt.picked { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.qc-letter { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 8px; background: var(--hover); font-weight: 600; font-size: 13px; flex: none; }
.qc-text { flex: 1; }
.quiz-card.done .qc-opt:not(.picked) { opacity: .6; }
.qc-open { display: flex; gap: 8px; align-items: flex-end; }
.qc-open textarea { flex: 1; resize: vertical; min-height: 44px; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font: inherit; outline: 0; }
.qc-open textarea:focus { border-color: var(--border-strong); }
.chat-item > .i { width: 14px; height: 14px; color: var(--muted); flex: none; }
.graph-svg .area-label { fill: var(--text); font: 600 14px var(--font); }
.math-verify { display: flex; align-items: flex-start; gap: 8px; margin-top: 10px; font-size: 12.5px; color: var(--muted); }
.math-verify .i { width: 15px; height: 15px; flex: none; margin-top: 1px; color: #16a34a; }
.math-verify.bad { padding: 10px 12px; border-radius: 12px; color: var(--text); background: color-mix(in srgb, var(--danger) 9%, transparent); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); font-size: 13.5px; }
.math-verify.bad .i { color: var(--danger); }
.math-verify.bad b { display: block; margin-bottom: 4px; }
.math-verify code { font: 12.5px var(--mono); background: var(--hover); padding: 1px 6px; border-radius: 6px; }
.math-verify code.ok { color: #16a34a; }

.pw-change { display: flex; flex-direction: column; gap: 8px; margin-top: 18px; padding-top: 4px; border-top: 1px solid var(--border); }
.pw-change input { padding: 9px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font: inherit; font-size: 14px; outline: 0; }
.pw-change .btn { align-self: flex-start; }

/* Composer: keyboard hint for a new line (hidden on touch screens and narrow widths) */
.kbd-hint { margin-left: auto; display: inline-flex; align-items: center; gap: 5px; font-size: 12px; color: var(--muted); white-space: nowrap; user-select: none; opacity: .85; }
.kbd-hint kbd { font: 500 11px/1 var(--font); padding: 3px 6px; border-radius: 6px; border: 1px solid var(--border); border-bottom-width: 2px; background: var(--surface); color: var(--text-2); }
.kbd-hint ~ .send-btn { margin-left: 8px; }
@media (hover: none), (max-width: 640px) { .kbd-hint { display: none; } .kbd-hint ~ .send-btn { margin-left: auto; } }

/* ---------- interactive quiz player ---------- */
.qp { position: fixed; inset: 0; z-index: 85; display: grid; place-items: center; padding: 16px; background: rgb(8 12 24 / .5); backdrop-filter: blur(4px); animation: qp-in .18s ease-out; }
@keyframes qp-in { from { opacity: 0; } }
.qp-sheet { width: min(760px, 100%); height: min(720px, 94vh); display: flex; flex-direction: column; background: var(--bg); border: 1px solid var(--border); border-radius: 22px; box-shadow: 0 40px 100px -30px rgb(0 0 0 / .5); overflow: hidden; }
.qp-head { display: flex; align-items: center; gap: 14px; padding: 18px 22px 12px; }
.qp-title { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qp-progress { flex: 1; height: 6px; border-radius: 6px; background: var(--hover); overflow: hidden; }
.qp-progress span { display: block; height: 100%; background: var(--accent); border-radius: 6px; transition: width .4s cubic-bezier(.4, 0, .2, 1); }
.qp-score { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.qp-score .i { width: 14px; height: 14px; color: #16a34a; }
.qp-score b { color: var(--text); }
.qp-body { flex: 1; overflow: auto; padding: 18px 34px 10px; }
.qp-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 22px 18px; border-top: 1px solid var(--border); min-height: 66px; }
.qp-foot .btn.primary { margin-left: auto; padding: 10px 20px; }
.qp-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 12.5px; color: var(--muted); margin-bottom: 14px; }
.qp-topic { padding: 3px 9px; border-radius: 999px; background: var(--hover); color: var(--text-2); }
.qp-topic:empty { display: none; }
.qp-level { padding: 3px 9px; border-radius: 999px; font-weight: 600; }
.qp-level.easy { background: color-mix(in srgb, #16a34a 14%, transparent); color: #16a34a; }
.qp-level.medium { background: color-mix(in srgb, #d97706 14%, transparent); color: #d97706; }
.qp-level.hard { background: color-mix(in srgb, #dc2626 14%, transparent); color: #dc2626; }
.qp-q { font-size: 20px; line-height: 1.45; font-weight: 500; letter-spacing: -.01em; margin-bottom: 22px; }
.qp-q p, .qp-text p, .qp-expl p, .qp-model p { margin: 0; }
.qp-answers { display: grid; gap: 10px; }
.qp-opt { display: flex; align-items: center; gap: 14px; width: 100%; text-align: left; padding: 14px 16px; border-radius: 14px; border: 1.5px solid var(--border); background: var(--surface); font-size: 15.5px; line-height: 1.4; transition: border-color .15s, background .15s, transform .08s, opacity .2s; }
.qp-opt:hover:not(:disabled) { border-color: var(--accent); }
.qp-opt:active:not(:disabled) { transform: scale(.99); }
.qp-opt:disabled { cursor: default; }
.qp-letter { flex: none; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: var(--hover); font-weight: 600; font-size: 13px; color: var(--text-2); }
.qp-text { flex: 1; }
.qp-mark { flex: none; width: 22px; }
.qp-mark .i { width: 20px; height: 20px; }
.qp-opt.picked { border-color: var(--accent); }
.qp-opt.right { border-color: #16a34a; background: color-mix(in srgb, #16a34a 9%, var(--surface)); }
.qp-opt.right .qp-letter { background: #16a34a; color: #fff; }
.qp-opt.right .qp-mark { color: #16a34a; }
.qp-opt.wrong { border-color: #dc2626; background: color-mix(in srgb, #dc2626 8%, var(--surface)); animation: qp-shake .3s; }
.qp-opt.wrong .qp-letter { background: #dc2626; color: #fff; }
.qp-opt.wrong .qp-mark { color: #dc2626; }
.qp-opt.dim { opacity: .5; }
@keyframes qp-shake { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }
.qp-input { width: 100%; padding: 14px 16px; border-radius: 14px; border: 1.5px solid var(--border); background: var(--surface); font: inherit; font-size: 15.5px; resize: vertical; outline: 0; color: var(--text); }
.qp-input:focus { border-color: var(--accent); }
.qp-feedback { margin-top: 18px; padding: 16px 18px; border-radius: 14px; animation: qp-up .25s ease-out; font-size: 15px; line-height: 1.55; }
@keyframes qp-up { from { opacity: 0; transform: translateY(6px); } }
.qp-feedback.ok { background: color-mix(in srgb, #16a34a 9%, transparent); }
.qp-feedback.bad { background: color-mix(in srgb, #dc2626 8%, transparent); }
.qp-feedback p { margin: 6px 0 0; }
.qp-verdict { display: flex; align-items: center; gap: 8px; font-size: 16px; }
.qp-feedback.ok .qp-verdict { color: #16a34a; }
.qp-feedback.bad .qp-verdict { color: #dc2626; }
.qp-model, .qp-expl, .qp-why { margin-top: 10px; }
.qp-expl p { margin: 4px 0 0; }
.qp-expl .katex-display, .qp-model .katex-display { margin: 6px 0; text-align: center; }
.qp-why { padding-left: 10px; border-left: 3px solid color-mix(in srgb, #dc2626 55%, transparent); }
/* A formula that is a whole option ("$3$") stays inline and left-aligned like text. */
.qp-text .math-block { display: inline; }
.qp-text .katex-display { display: inline; margin: 0; text-align: left; }
.qp-text .katex-display > .katex { display: inline; text-align: left; }
.qp-fig { margin: -8px 0 20px; display: flex; justify-content: center; }
.qp-fig .graph { width: 100%; max-width: 460px; }
.qp-fig-svg { width: 100%; max-width: 380px; height: auto; overflow: visible; }
.qp-fig-svg .tri { fill: color-mix(in srgb, var(--accent) 10%, transparent); stroke: var(--text); stroke-width: 2; stroke-linejoin: round; }
.qp-fig-svg .arc { fill: none; stroke: var(--accent); stroke-width: 1.6; }
.qp-fig-svg text { font: 500 14px var(--font, system-ui); fill: var(--text); }
.qp-fig-svg .vx { font-weight: 700; font-size: 15px; }
.qp-fig-svg .lbl { fill: var(--muted); }
.qp-fig-svg .lbl.ask { fill: var(--accent); font-weight: 700; }
.qp-model small, .qp-expl small, .qp-why small, .qp-rbody small { display: block; font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin-bottom: 2px; }
.qp-loading { height: 100%; min-height: 300px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; color: var(--muted); text-align: center; }
.qp-spinner { width: 34px; height: 34px; border-radius: 50%; border: 3px solid var(--hover); border-top-color: var(--accent); animation: qp-spin .8s linear infinite; }
@keyframes qp-spin { to { transform: rotate(360deg); } }
.qp-err { color: var(--danger); }
.qp-summary { text-align: center; padding-top: 8px; }
.qp-ring { --p: 0; width: 132px; height: 132px; margin: 6px auto 16px; border-radius: 50%; display: grid; place-content: center;
  background: radial-gradient(closest-side, var(--bg) 79%, transparent 80% 100%), conic-gradient(var(--accent) calc(var(--p) * 1%), var(--hover) 0); }
.qp-ring b { font-size: 26px; font-weight: 600; }
.qp-ring small { color: var(--muted); }
.qp-summary h2 { margin: 0 0 4px; font-size: 21px; letter-spacing: -.01em; }
.qp-review { text-align: left; margin-top: 22px; display: grid; gap: 8px; }
.qp-ritem { border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.qp-ritem summary { display: flex; align-items: center; gap: 10px; padding: 11px 14px; cursor: pointer; list-style: none; font-size: 14.5px; }
.qp-ritem summary::-webkit-details-marker { display: none; }
.qp-ritem summary > .i { flex: none; width: 18px; height: 18px; }
.qp-ritem.ok summary > .i { color: #16a34a; }
.qp-ritem.bad summary > .i { color: #dc2626; }
.qp-rn { color: var(--muted); font-size: 12.5px; }
.qp-rq { flex: 1; }
.qp-rq p { margin: 0; }
.qp-rbody { padding: 0 14px 12px 42px; display: grid; gap: 8px; font-size: 14.5px; }
.qp-rbody p { margin: 0; }
@media (max-width: 640px) {
  .qp { padding: 0; }
  .qp-sheet { height: 100%; border-radius: 0; border: 0; }
  .qp-body { padding: 14px 18px; }
  .qp-q { font-size: 18px; }
  .qp-title { display: none; }
}

/* Formulas copy as LaTeX on click */
.tex { cursor: copy; border-radius: 4px; transition: background .15s; }
.tex:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }

/* ---------- project files library ---------- */
#projectFiles .pf-head-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
#projectFiles #projectFilesName { margin: 0; font-size: 18px; font-weight: 700; letter-spacing: -.015em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#projectFiles .pf-head-text small { color: var(--muted); font-size: 12.5px; }
#projectFiles .pf-note { color: var(--muted); font-size: 13px; margin: 0 0 12px; }
#projectFiles .pf-toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
#projectFiles .pf-progress { color: var(--muted); font-size: 12.5px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#projectFiles .pf-list { border: 1px solid var(--border); border-radius: 12px; background: var(--bg); overflow: hidden; }
#projectFiles .pf-empty { padding: 18px; color: var(--muted); font-size: 13.5px; text-align: center; }
.project-file-row { display: flex; align-items: center; gap: 10px; padding: 9px 10px 9px 14px; border-bottom: 1px solid var(--border); }
.project-file-row:last-child { border-bottom: 0; }
.project-file-row .pf-ico { flex: none; display: grid; place-items: center; color: var(--muted); }
.project-file-row .pf-ico .i { width: 16px; height: 16px; }
.project-file-row .pf-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.project-file-row .pf-size { flex: none; color: var(--muted); font-size: 11.5px; }
.project-file-row .pf-actions { flex: none; display: flex; align-items: center; gap: 2px; }
.project-file-row .pf-actions .icon-btn { width: 28px; height: 28px; color: var(--muted); }
.project-file-row .pf-actions .icon-btn .i { width: 15px; height: 15px; }
.project-file-row .pf-actions .icon-btn:hover { color: var(--text); background: var(--hover); }
.project-file-row .pf-actions .pf-delete:hover { color: var(--danger); }

#projectFiles { max-height: calc(100vh - 24px); }
.pf-preview .dlg-head h3 { margin: 0; font-size: 16px; font-weight: 700; max-width: 60vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pf-preview-body { display: grid; place-items: center; padding: 0 22px 18px; }
.pf-preview-body img { max-width: min(80vw, 900px); max-height: 70vh; border-radius: 10px; background: var(--bg); object-fit: contain; }

@media (max-width: 640px) {
  #projectFiles .dlg-body { padding-left: 16px; padding-right: 16px; }
  .project-file-row .pf-size { display: none; }
}

/* Maple code blocks look like a Maple worksheet (white paper, red 1D input, ">" prompts). Other code stays dark. */
.codeblock.maple { background: #ffffff; border: 1px solid #d9dde6; color: #1a1a1a; }
.codeblock.maple .code-head { background: #f3f5f9; color: #4b5568; border-bottom: 1px solid #e3e6ee; }
.codeblock.maple .code-head span:first-child { font-family: var(--font); font-weight: 600; letter-spacing: .01em; }
.codeblock.maple .copy-btn { color: #4b5568; }
.codeblock.maple .copy-btn:hover { background: #e6e9f0; color: #1a1a1a; }
.codeblock.maple pre { background: #ffffff; margin: 0; padding: 12px 14px 12px 8px; border-left: 3px solid #b8bfcc; margin-left: 10px; }
.codeblock.maple code { background: none; color: inherit; font-family: "Courier New", Courier, var(--mono); font-size: 14px; }
.mp-line { display: flex; min-height: 1.5em; line-height: 1.5; }
.mp-prompt { flex: none; width: 1.4em; color: #1a1a1a; font-weight: 600; user-select: none; }
.mp-in { color: #d0021b; white-space: pre-wrap; }
.mp-comment { color: #6b7280; font-style: italic; white-space: pre-wrap; }

/* PDF page-range dialog. The shared ".dlg-body input" rule above makes every
   non-checkbox control full width, so radios and the compact number boxes opt out here. */
.dlg label.radio { display: flex; align-items: center; gap: 8px; margin: 6px 0; cursor: pointer; max-width: 100%; }
.dlg label.radio span { min-width: 0; overflow-wrap: anywhere; }
.dlg .page-range { display: flex; align-items: center; gap: 8px; margin: 4px 0 0 26px; }
.dlg .dlg-body .page-range input[type=number] { width: 92px; margin-top: 0; padding: 7px 10px; text-align: center; }

/* Quiz material: study plan pills and the "use my documents" switch */
.qz-material { margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.qz-material .qz-adaptive { margin: 0 0 10px; }
.qz-pills { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.qz-pill { display: inline-flex; align-items: center; gap: 6px; max-width: 260px; padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px; font-size: 13px; transition: border-color .15s, background .15s; }
.qz-pill span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qz-pill svg { width: 14px; height: 14px; flex: none; opacity: .7; }
.qz-pill:hover { background: var(--hover); }
.qz-pill.on { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); background: var(--hover); }

/* ---------- emner (units inside a fag folder) ---------- */
.chat-item.nested.emne { gap: 6px; padding-left: 26px; color: var(--text); }
.chat-item.nested.emne .fname { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.chat-item.nested.emne small { color: var(--muted); font-size: 11.5px; }
.chat-item.nested.deep { padding-left: 48px; }
#moveMenu .emne-opt .i:first-child { color: var(--accent); }
dialog.emner-dlg { width: min(680px, calc(100vw - 32px)); }
.emner-dlg .dlg-body { max-height: min(74vh, 720px); }
.em-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.em-empty { margin: 0 0 6px; font-size: 14px; }
.em-row { display: flex; align-items: flex-start; gap: 10px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; }
.em-ico { flex: none; display: inline-flex; padding-top: 2px; color: var(--muted); }
.em-ico .i, .em-ico svg { width: 15px; height: 15px; }
.em-main { flex: 1; min-width: 0; }
.em-title { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.em-title b { font-weight: 600; }
.em-period { color: var(--muted); font-size: 12.5px; }
.em-tag { font-size: 11px; padding: 1px 7px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); }
.em-desc { margin: 4px 0 0; color: var(--text-2); font-size: 13px; line-height: 1.45; white-space: pre-line; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.em-count { flex: none; color: var(--muted); font-size: 12px; padding-top: 2px; white-space: nowrap; }
.em-btns { flex: none; display: flex; gap: 2px; }
.em-add { align-self: flex-start; display: inline-flex; align-items: center; gap: 6px; }
.em-form { display: flex; flex-direction: column; gap: 8px; padding: 12px; border: 1px solid var(--accent); border-radius: 12px; }
.em-form input, .em-form textarea { margin-top: 0 !important; }
.em-dates { display: flex; gap: 10px; }
.em-dates label { flex: 1; margin: 0; font-size: 12.5px; color: var(--muted); }
.em-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 10px; }
.em-card { padding: 14px 16px; border: 1px solid var(--border); border-radius: 14px; background: color-mix(in srgb, var(--hover) 45%, transparent); margin-bottom: 14px; }
.em-card h3 { margin: 0 0 4px; font-size: 15px; }
.em-card > p { margin: 0 0 10px; }
.em-paste { margin-top: 10px !important; }
.em-proposals, .em-sort { display: flex; flex-direction: column; gap: 6px; margin-top: 6px; }
.emner-dlg .dlg-body label.em-prop { display: flex; align-items: flex-start; gap: 10px; margin: 0 !important; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); cursor: pointer; }
.em-prop > input[type=checkbox] { margin-top: 10px; accent-color: var(--accent); width: 16px; height: 16px; flex: none; }
.em-prop .em-pname { margin: 0 0 2px !important; padding: 6px 10px !important; font-weight: 600; }
.em-sitem { display: flex; align-items: center; gap: 10px; padding: 6px 10px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.em-sitem.moved { border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); }
.em-stitle { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13.5px; }
.em-sitem .em-pick { width: auto !important; max-width: 46%; margin: 0 !important; padding: 5px 10px !important; font-size: 13px !important; }
@media (max-width: 560px) { .em-dates { flex-direction: column; } .em-sitem { flex-wrap: wrap; } .em-sitem .em-pick { max-width: 100%; width: 100% !important; } .em-count { display: none; } }

/* Files in an emne: the list in the emner window and the tag in the folder's file list. */
.em-count { background: none; border: 0; padding: 2px 4px; border-radius: 6px; display: inline-flex; gap: 6px; color: var(--muted); font-size: 12px; white-space: nowrap; cursor: pointer; }
.em-count:not(:disabled):hover { background: var(--hover); color: var(--text); }
.em-count:disabled { cursor: default; }
.em-files { display: flex; flex-direction: column; gap: 2px; margin-top: 8px; }
.em-file { display: flex; align-items: center; gap: 8px; padding: 4px 6px; border-radius: 8px; font-size: 13px; }
.em-file:hover { background: var(--hover); }
.em-file > .i, .em-file > svg { width: 14px; height: 14px; color: var(--muted); flex: none; }
.em-file span { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#projectFiles .pf-emne { flex: none; max-width: 34%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; padding: 1px 7px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); }

/* ---------- emner: colours, icons, archive, drag & drop ---------- */
.ec-blue { --ec: #3b82f6; } .ec-green { --ec: #16a34a; } .ec-amber { --ec: #d97706; } .ec-red { --ec: #dc2626; }
.ec-purple { --ec: #8b5cf6; } .ec-pink { --ec: #db2777; } .ec-teal { --ec: #0d9488; } .ec-gray { --ec: #6b7280; } .ec-none { --ec: var(--muted); }
.em-ico[class*="ec-"] { color: var(--ec); }
.chat-item.emne > .em-ico { display: inline-flex; padding: 0; flex: none; }
.chat-item.emne > .em-ico .i, .chat-item.emne > .em-ico svg { width: 14px; height: 14px; }
.chat-item.emne.archived .fname, .em-row.archived { opacity: .6; }
.chat-item.emne-archive { color: var(--muted); font-size: 12.5px; gap: 6px; padding-left: 26px; }
.chat-item.emne-archive .fname { flex: 1; }
.chat-item.drop, .em-row.drop { outline: 2px dashed var(--accent); outline-offset: -2px; background: color-mix(in srgb, var(--accent) 10%, transparent); }
.chat-item[draggable="true"] { -webkit-user-drag: element; }
/* The "drop files into the chat" overlay leaves the sidebar free, so files can be dropped on a fag or an emne. */
@media (min-width: 801px) { #dropzone { left: var(--side-w, 272px); } }
.em-look { display: flex; align-items: center; gap: 10px; }
.em-look-label { width: 52px; flex: none; font-size: 12.5px; color: var(--muted); }
.em-swatches, .em-icons { display: flex; flex-wrap: wrap; gap: 6px; }
.em-swatch { width: 22px; height: 22px; border-radius: 50%; background: var(--ec); border: 2px solid transparent; box-shadow: inset 0 0 0 2px var(--surface); }
.em-swatch.on { border-color: var(--text); }
.em-iconpick { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 8px; color: var(--ec); border: 1px solid var(--border); }
.em-iconpick .i, .em-iconpick svg { width: 15px; height: 15px; }
.em-iconpick.on { border-color: var(--ec); background: color-mix(in srgb, var(--ec) 16%, transparent); }
.em-archtoggle { display: inline-flex; align-items: center; gap: 6px; align-self: flex-start; padding: 4px 6px; color: var(--muted); font-size: 13px; border-radius: 8px; }
.em-archtoggle .i { width: 14px; height: 14px; transition: transform .15s; transform: rotate(-90deg); }
.em-archtoggle.open .i { transform: none; }
.em-loose { margin-top: 6px; padding: 10px 12px; border: 1px dashed var(--border); border-radius: 12px; }
.em-loose h4 { margin: 0 0 6px; font-size: 12.5px; font-weight: 500; color: var(--muted); }
.em-file[draggable="true"] { cursor: grab; }

/* "What can I already do?" */
dialog.emne-progress, dialog.emne-search { width: min(620px, calc(100vw - 32px)); }
.ep-head { display: flex; align-items: center; gap: 18px; margin-bottom: 14px; }
.ep-head .qp-ring { width: 92px; height: 92px; margin: 0; flex: none; }
.ep-head .qp-ring b { font-size: 20px; }
.ep-sum p { margin: 0; }
.ep-line { color: var(--muted); font-size: 13.5px; margin-top: 4px !important; }
.ep-sec { margin-top: 14px; }
.ep-sec h3 { margin: 0; font-size: 15px; }
.ep-sec > p { margin: 2px 0 8px; }
.ep-weak h3 { color: #dc2626; } .ep-practising h3 { color: #d97706; } .ep-strong h3 { color: #16a34a; }
.ep-list { display: flex; flex-direction: column; gap: 6px; }
.ep-item { padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px; }
.ep-top { display: flex; align-items: center; gap: 10px; }
.ep-top b { flex: 1; min-width: 0; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ep-bar { width: 90px; height: 6px; border-radius: 3px; background: var(--hover); overflow: hidden; flex: none; }
.ep-bar span { display: block; height: 100%; background: currentColor; }
.ep-weak .ep-bar { color: #dc2626; } .ep-practising .ep-bar { color: #d97706; } .ep-strong .ep-bar { color: #16a34a; }
.ep-top small { color: var(--muted); width: 34px; text-align: right; }
.ep-wrong { margin-top: 6px; font-size: 13px; color: var(--text-2); }
.ep-wrong summary { cursor: pointer; color: var(--muted); }
.ep-q { margin: 6px 0 0 12px; }
.ep-advice h3 { margin: 16px 0 4px; font-size: 15px; }
.ep-advice ul { margin: 0; padding-left: 20px; }
.ep-advice li { margin: 4px 0; }

/* Search in one emne */
.emne-search .es-input { margin-top: 0 !important; }
.es-results { display: flex; flex-direction: column; gap: 4px; margin-top: 10px; }
.es-item { display: flex; align-items: flex-start; gap: 10px; text-align: left; padding: 8px 10px; border-radius: 10px; }
.es-item:hover { background: var(--hover); }
.es-item > .i, .es-item > svg { width: 15px; height: 15px; margin-top: 3px; color: var(--muted); flex: none; }
.es-main { display: flex; flex-direction: column; min-width: 0; }
.es-main small { color: var(--muted); font-size: 12.5px; }
.es-item mark { background: color-mix(in srgb, #facc15 45%, transparent); color: inherit; border-radius: 3px; }

/* Export: only the emne is printed ("Save as PDF"). */
#printEmne { display: none; }
@media print {
  html.print-emne body > *:not(#printEmne) { display: none !important; }
  html.print-emne body { background: #fff !important; color: #111 !important; overflow: visible !important; height: auto !important; }
  html.print-emne #printEmne { display: block; font: 11pt/1.5 var(--font); color: #111; padding: 0 4mm; }
  #printEmne h1 { font-size: 22pt; margin: 2mm 0 1mm; }
  #printEmne h2 { font-size: 14pt; margin: 8mm 0 2mm; border-bottom: 1px solid #ccc; padding-bottom: 1mm; }
  #printEmne h3 { font-size: 12pt; margin: 5mm 0 1mm; }
  #printEmne .pe-kicker, #printEmne .pe-meta { color: #666; font-size: 9.5pt; margin: 0; }
  #printEmne .pe-desc { white-space: pre-line; }
  #printEmne .pe-chat, #printEmne .pe-file { break-inside: auto; }
  #printEmne .pe-msg { margin: 2mm 0; }
  #printEmne .pe-who { font-weight: 700; font-size: 9.5pt; color: #444; }
  #printEmne .pe-user .pe-text { background: #f2f2f5; padding: 2mm 3mm; border-radius: 2mm; }
  #printEmne .pe-text { white-space: pre-wrap; }
  #printEmne .pe-weak { color: #b91c1c; } #printEmne .pe-strong { color: #15803d; }
  #printEmne .md { color: #111; }
}
/* Menu separators: ".popover > *" gives every child padding, which made the 1px line a thick bar. */
.popover > .pop-sep { padding: 0; height: 1px; width: auto; margin: 4px 6px; background: var(--border); border-radius: 0; }
.popover > .pop-sep:hover { background: var(--border); }

/* ---------- test countdown and emne summary ---------- */
.tc-badge { flex: none; font-size: 10.5px; font-weight: 600; padding: 1px 6px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }
.tc-badge.soon { background: color-mix(in srgb, #dc2626 16%, transparent); color: #dc2626; }
.chat-item:hover .tc-badge { opacity: 0; }
.em-tag.tc { background: color-mix(in srgb, #dc2626 14%, transparent); color: #dc2626; }
dialog.emne-test, dialog.emne-summary { width: min(640px, calc(100vw - 32px)); }
.emne-test .dlg-body, .emne-summary .dlg-body { max-height: min(74vh, 720px); }
.tc-top { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-bottom: 12px; }
.tc-big { display: flex; flex-direction: column; align-items: center; justify-content: center; min-width: 110px; padding: 10px 14px; border-radius: 16px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); }
.tc-big b { font-size: 34px; line-height: 1; }
.tc-big span { font-size: 12.5px; text-align: center; }
.tc-big .i { width: 24px; height: 24px; }
.tc-date { display: flex; align-items: flex-end; gap: 10px; flex: 1; min-width: 220px; }
.tc-date label { flex: 1; margin: 0 !important; }
.tc-progress { margin: 0 0 8px; color: var(--muted); font-size: 13px; }
.tc-days { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.tc-day { display: flex; gap: 10px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; }
.tc-day.today { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, transparent); }
.tc-day.past:not(.done) { opacity: .75; }
.tc-day.done .tc-main { opacity: .55; }
.tc-day.done b { text-decoration: line-through; }
.tc-check { margin: 2px 0 0 !important; }
.tc-check input { width: 17px; height: 17px; accent-color: var(--accent); }
.tc-main { flex: 1; min-width: 0; }
.tc-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.tc-when { color: var(--muted); font-size: 12px; min-width: 64px; }
.tc-day.today .tc-when { color: var(--accent); font-weight: 600; }
.tc-task { margin: 4px 0 6px; font-size: 13.5px; color: var(--text-2); line-height: 1.45; }
.tc-concepts { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.tc-pill { font-size: 12px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); }
.tc-quiz { margin-left: auto; padding: 4px 10px !important; font-size: 12.5px; display: inline-flex; align-items: center; gap: 5px; }
.tc-quiz .i { width: 13px; height: 13px; }
.es-summary { font-size: 14.5px; }
.es-summary h2 { font-size: 16px; margin: 16px 0 6px; }
.es-summary h2:first-child { margin-top: 0; }
/* Reordering fag folders: a line shows where the dragged folder lands. */
.chat-item.folder.drop-before { box-shadow: inset 0 2px 0 var(--accent); }
.chat-item.folder.drop-after { box-shadow: inset 0 -2px 0 var(--accent); }
.chat-item.folder.dragging { opacity: .45; }
.chat-item.folder[draggable="true"] { cursor: grab; }

/* ---------- feedback on answers ---------- */
.actions .fb-btn.done { color: #16a34a; }
.fb-cats { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.dlg-body label.fb-cat { display: inline-flex; align-items: center; gap: 6px; margin: 0; padding: 6px 11px; border: 1px solid var(--border); border-radius: 999px; font-size: 13px; cursor: pointer; }
.dlg-body label.fb-cat:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.fb-cat input { accent-color: var(--accent); margin: 0; }
.dlg-body label.fb-share { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; }
.fb-share input { margin-top: 3px; accent-color: var(--accent); width: 16px; height: 16px; flex: none; }
.fb-share small { display: block; color: var(--muted); font-weight: 400; margin-top: 2px; line-height: 1.45; }
.fb-mine { margin-top: 10px; color: var(--accent); font-size: 13px; padding: 0; background: none; border: 0; }
.fb-list { display: flex; flex-direction: column; gap: 8px; }
.fb-row { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; }
.fb-row .fb-main { flex: 1; min-width: 0; }
.fb-row small { display: block; color: var(--muted); }
.fb-row p { margin: 6px 0 0; }
.fb-tag { color: #16a34a; } .fb-tag.off { color: var(--muted); }
.fb-chip { display: inline-block; font-size: 12px; padding: 1px 8px; margin: 0 4px 4px 0; border-radius: 999px; background: var(--hover); }
.fb-comment { white-space: pre-wrap; }
/* operator page */
.fb-filter { display: flex; gap: 6px; flex-wrap: wrap; margin: 0 0 16px; }
.fb-cards { display: flex; flex-direction: column; gap: 14px; }
.fb-card { border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; background: var(--surface); }
.fb-card header { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.fb-card header small { display: block; color: var(--muted); }
.fb-status-btns { display: flex; gap: 4px; flex-wrap: wrap; }
.fb-status-btns .btn { padding: 4px 10px; font-size: 12.5px; }
.fb-cats-line { margin: 8px 0; display: flex; gap: 4px; flex-wrap: wrap; }
.fb-card blockquote { margin: 0 0 10px; padding: 8px 12px; border-left: 3px solid var(--accent); background: var(--hover); border-radius: 0 8px 8px 0; white-space: pre-wrap; }
.fb-chat { display: flex; flex-direction: column; gap: 8px; max-height: 520px; overflow-y: auto; }
.fb-msg { padding: 8px 12px; border-radius: 10px; background: var(--hover); }
.fb-msg.assistant { background: transparent; border: 1px solid var(--border); }
.fb-msg.reported { border: 2px solid #dc2626; }
.fb-who { font-size: 11.5px; font-weight: 600; color: var(--muted); margin-bottom: 4px; }
.fb-text { white-space: pre-wrap; font-size: 13.5px; line-height: 1.5; }
.fb-card footer { display: flex; gap: 8px; margin-top: 10px; }
.fb-note { flex: 1; padding: 7px 10px; border-radius: 9px; border: 1px solid var(--border); background: var(--bg); }

/* ---------- teacher tooling: Maple helpers, Euklid check, board view, worksheet, nudge ---------- */
.code-acts { display: inline-flex; align-items: center; gap: 2px; }
.code-head .maple-act { font: 500 12px var(--font); }
.maple-checks { margin: -8px 0 14px; padding: 8px 12px 9px; border: 1px solid var(--border); border-top: 0; border-radius: 0 0 12px 12px; background: var(--surface); font-size: 13px; }
.maple-checks .mc-title { display: flex; align-items: center; gap: 6px; font-weight: 600; font-size: 12.5px; color: var(--muted); margin-bottom: 4px; }
.maple-checks .mc-title .i { width: 14px; height: 14px; }
.maple-checks.compact { display: flex; align-items: center; gap: 6px; padding: 5px 12px; font-size: 12.5px; color: var(--muted); }
.maple-checks.compact .i { width: 14px; height: 14px; color: #15803d; }
.mc-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px; padding: 2px 0; }
.maple-checks .mc-row code { font: 12.5px/1.5 var(--mono); background: transparent; padding: 0; color: var(--text); overflow-wrap: anywhere; }
.mc-row .mc-arrow { color: var(--muted); }
.mc-row .mc-mark { display: inline-flex; align-items: center; gap: 5px; }
.mc-row .mc-mark .i { width: 14px; height: 14px; }
.mc-row.ok .mc-mark { color: #15803d; }
.mc-row.bad .mc-mark { color: #b45309; }
.mc-row.bad .mc-out { font-weight: 700; }
.mc-row .mc-mark small { font-size: 12px; font-weight: 600; }
@media (prefers-color-scheme: dark) { .mc-row.ok .mc-mark { color: #4ade80; } .mc-row.bad .mc-mark { color: #fbbf24; } }

.pilot-note { margin: 28px 0 0; font-size: 12.5px; color: var(--muted); }
.pilot-note a { color: var(--muted); text-decoration: underline; text-underline-offset: 3px; }
.pilot-note a:hover { color: var(--text); }

.fag-nudge { display: flex; align-items: center; justify-content: center; gap: 2px; margin: 6px 0 0; font-size: 13px; }
.fag-nudge .nudge-yes { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px; color: var(--accent); background: var(--accent-soft); font-weight: 500; }
.fag-nudge .nudge-yes:hover { filter: brightness(.96); }
.fag-nudge .i { width: 14px; height: 14px; }
.fag-nudge .nudge-x { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; color: var(--muted); }
.fag-nudge .nudge-x:hover { background: var(--hover); color: var(--text); }

/* Board view: high contrast, big type, built for a projector. */
.board { position: fixed; inset: 0; z-index: 400; display: flex; flex-direction: column; background: #fff; color: #000; outline: none; --text: #000; --text-2: #111; --muted: #444; --border: #bbb; --accent: #0b2a9a; --code-bg: #0b0f1a; --code-head: #1a2238; }
@media (prefers-color-scheme: dark) { .board { background: #000; color: #fff; --text: #fff; --text-2: #f1f1f1; --muted: #bbb; --border: #555; --accent: #9db4ff; } }
.board .bd-stage { flex: 1; overflow-y: auto; padding: 5vh 6vw 8vh; scroll-behavior: smooth; }
.board .bd-steps { max-width: 1500px; margin: 0 auto; }
.board .bd-step { font-size: clamp(26px, 3.4vw, 56px); line-height: 1.45; opacity: .7; transition: opacity .2s; margin-bottom: .5em; }
.board .bd-step.now { opacity: 1; }
.board .bd-step > * { margin-top: 0; margin-bottom: .35em; }
.board .bd-step h1, .board .bd-step h2, .board .bd-step h3, .board .bd-step h4 { font-size: 1.25em; line-height: 1.25; font-weight: 800; margin: 0 0 .3em; }
.board .bd-step ol, .board .bd-step ul { padding-left: 1.4em; }
.board .bd-step strong { font-weight: 800; }
.board .bd-step .katex { font-size: 1.1em; }
.board .bd-step .math-block { margin: .3em 0; overflow-x: auto; overflow-y: hidden; }
.board .bd-step .katex-display { margin: .2em 0; }
.board .bd-step .codeblock code, .board .bd-step .codeblock .hljs { font-size: .62em; }
.board .bd-step .code-head, .board .bd-step .maple-checks .mc-title { font-size: .45em; }
.board .bd-step .code-head .copy-btn { display: none; }
.board .bd-step .maple-checks { font-size: .55em; background: transparent; }
.board .bd-step .maple-checks .mc-row code { font-size: 1em; }
.board .bd-step .graph { max-width: 900px; }
.board .bd-close { position: absolute; top: 14px; right: 18px; width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; color: var(--muted); }
.board .bd-close:hover, .board .bd-bar button:hover:not(:disabled) { background: rgb(128 128 128 / .22); color: var(--text); }
.board .bd-close .i { width: 26px; height: 26px; }
.board .bd-bar { display: flex; align-items: center; justify-content: center; gap: 14px; padding: 10px 16px 14px; font-size: 18px; color: var(--muted); }
.board .bd-bar button { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 50%; border: 2px solid var(--border); }
.board .bd-bar button:disabled { opacity: .3; cursor: default; }
.board .bd-bar .i { width: 22px; height: 22px; }
.board .bd-count { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--text); min-width: 4.5em; text-align: center; }
.board .bd-hint { font-size: 14px; margin-left: 18px; }
@media (max-width: 700px) { .board .bd-hint { display: none; } }

.copy-btn.teacher-act span { font-size: 12.5px; }

/* Worksheet print (reuses the #printEmne export): the facit starts on a new page. */
@media print {
  #printEmne .ps-facit { break-before: page; page-break-before: always; }
  #printEmne .md, #printEmne .md * { color: #111; }
  #printEmne .md .codeblock { border-color: #bbb; }
}