/* pages.css — all page-specific styles */

/* ══════════════
   HOME — empty
   ══════════════ */
.home-empty {
  flex:1; display:flex; align-items:center; justify-content:center; padding:40px 24px;
}
.home-empty-inner { max-width:460px; text-align:center; }
.home-empty-mark { width:68px; height:68px; background:var(--bg3); border:1.5px solid var(--border); border-radius:var(--r-lg); display:flex; align-items:center; justify-content:center; font-size:30px; color:var(--ink3); margin:0 auto 22px; }
.home-empty-title { font-size:28px; font-weight:800; letter-spacing:-.4px; margin-bottom:12px; }
.home-empty-body  { font-size:15px; color:var(--ink3); line-height:1.7; margin-bottom:28px; }
.home-empty-actions { display:flex; gap:10px; justify-content:center; flex-wrap:wrap; }

/* HOME — workspace grid */
.ws-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:12px; }
.ws-card {
  background:var(--white); border:1.5px solid var(--border); border-radius:var(--r);
  padding:18px; cursor:pointer; transition:all var(--t); display:flex; flex-direction:column; gap:9px;
}
.ws-card:hover { border-color:var(--ink); box-shadow:var(--sh); transform:translateY(-1px); }
.ws-card-top  { display:flex; align-items:flex-start; justify-content:space-between; }
.ws-card-ico  { width:36px; height:36px; background:var(--bg3); border-radius:var(--r-sm); display:flex; align-items:center; justify-content:center; font-size:19px; color:var(--ink3); }
.ws-card-del  { opacity:0; transition:opacity var(--t); }
.ws-card:hover .ws-card-del { opacity:1; }
.ws-card-name { font-size:15px; font-weight:700; color:var(--ink); }
.ws-card-date { font-size:12px; color:var(--ink4); }
.ws-card-new  { border-style:dashed; flex-direction:row; align-items:center; justify-content:center; gap:9px; color:var(--ink4); min-height:90px; }
.ws-card-new:hover { border-color:var(--ink3); color:var(--ink); background:var(--bg2); }
.ws-card-new i { font-size:22px; }
.ws-card-new span { font-size:14px; font-weight:600; }

/* HOME — dashboard */
.dash { max-width:860px; margin:0 auto; padding:0 0 40px; }
.dash-hero { display:flex; align-items:center; gap:14px; margin-bottom:24px; padding:20px; background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); }
.dash-hero-icon { width:48px; height:48px; background:var(--bg3); border-radius:10px; border:1.5px solid var(--border); display:flex; align-items:center; justify-content:center; font-size:22px; color:var(--ink3); flex-shrink:0; }
.dash-hero-info { flex:1; min-width:0; }
.dash-hero-name { font-size:19px; font-weight:800; letter-spacing:-.3px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.dash-hero-meta { font-size:13px; color:var(--ink3); margin-top:3px; }

.dash-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(160px,1fr)); gap:10px; margin-bottom:28px; }
.dash-card {
  background:var(--white); border:1.5px solid var(--border); border-radius:var(--r);
  padding:18px 16px; display:flex; flex-direction:column; gap:10px; cursor:pointer;
  transition:all var(--t); text-align:left; align-items:flex-start;
}
.dash-card:hover { border-color:var(--ink); box-shadow:var(--sh); transform:translateY(-2px); }
.dash-card-ico { width:40px; height:40px; border-radius: 10px; border: 1.5px solid var(--border); display:flex; align-items:center; justify-content:center; font-size:20px; background:var(--ico-bg,var(--bg3)); color:var(--ico-c,var(--ink3)); flex-shrink:0; }
.dash-card-label { font-size:14px; font-weight:700; color:var(--ink); }
.dash-card-count { font-size:12px; color:var(--ink3); font-weight:500; }

.dash-section { }
.dash-section-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:12px; }
.dash-section-title { font-size:14px; font-weight:700; color:var(--ink2); }
.dash-viewall-btn { font-size:12px; color:var(--ink4); font-weight:600; cursor:pointer; display:flex; align-items:center; gap:3px; transition:color var(--t); }
.dash-viewall-btn:hover { color:var(--ink); }
.dash-viewall-btn i { font-size:15px; }
.dash-empty-hint { font-size:14px; color:var(--ink4); padding:10px 0; }
.dash-link { color:var(--ink2); font-weight:600; cursor:pointer; text-decoration:underline; }

/* Recent sources in dash */
.src-row { display:flex; align-items:center; gap:12px; padding:11px 14px; background:var(--white); border:1.5px solid var(--border); border-radius:var(--r-sm); margin-bottom:7px; }
.src-row-ico  { font-size:21px; color:var(--ink3); flex-shrink:0; }
.src-row-info { flex:1; min-width:0; }
.src-row-name { font-size:14px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.src-row-meta { font-size:12px; color:var(--ink4); margin-top:2px; }

/* ══════════════
   SOURCES
   ══════════════ */
.upload-zone { border:2px dashed var(--border2); border-radius:var(--r); padding:40px 24px; text-align:center; cursor:pointer; transition:all var(--t); margin-bottom:20px; }
.upload-zone:hover, .upload-zone.drag { border-color:var(--ink); background:var(--bg3); }
.upload-zone-ico   { font-size:42px; color:var(--ink4); margin-bottom:12px; }
.upload-zone-title { font-size:16px; font-weight:700; margin-bottom:6px; }
.upload-zone-sub   { font-size:13px; color:var(--ink3); margin-bottom:14px; }
.upload-zone-tags  { display:flex; justify-content:center; gap:6px; flex-wrap:wrap; }

.src-list { display:flex; flex-direction:column; gap:8px; }
.source-item { display:flex; align-items:center; gap:12px; padding:13px 15px; background:var(--white); border:1.5px solid var(--border); border-radius:var(--r-sm); margin-bottom:20px; }
.src-icon { font-size:24px; flex-shrink:0; }
.src-icon.pdf  { color:var(--error); }
.src-icon.docx,.src-icon.doc { color:var(--accent-blue); }
.src-icon.md   { color:var(--accent-violet); }
.src-icon.txt  { color:var(--ink3); }
.src-info { flex:1; min-width:0; }
.src-name { font-size:14px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.src-meta { font-size:12px; color:var(--ink4); margin-top:3px; display:flex; gap:10px; }
.src-actions { display:flex; gap:4px; flex-shrink:0; }
.src-processing { display:flex; align-items:center; gap:12px; padding:13px 15px; background:var(--bg2); border:1.5px solid var(--border); border-radius:var(--r-sm); }
.src-proc-info { flex:1; }
.src-proc-name { font-size:14px; font-weight:600; margin-bottom:7px; }
.src-proc-bar  { height:4px; background:var(--bg4); border-radius:99px; overflow:hidden; }
.src-proc-fill { height:100%; width:60%; background:var(--ink); border-radius:99px; animation:proc-pulse 1.2s ease-in-out infinite; }
@keyframes proc-pulse { 0%,100%{opacity:.5}50%{opacity:1} }

/* ══════════════
   NOTES
   ══════════════ */
.note-card { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); padding:18px; display:flex; flex-direction:column; gap:9px; cursor:pointer; transition:all var(--t); }
.note-card:hover { border-color:var(--ink); box-shadow:var(--sh); }
.note-card-icon { width:34px; height:34px; background:var(--bg3); border-radius:var(--r-sm); display:flex; align-items:center; justify-content:center; font-size:17px; color:var(--ink3); }
.note-card-title { font-size:15px; font-weight:700; color:var(--ink); line-height:1.3; }
.note-card-meta  { font-size:12px; color:var(--ink4); }
.note-card-preview { font-size:13px; color:var(--ink3); line-height:1.55; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.note-card-footer { display:flex; align-items:center; justify-content:space-between; margin-top:auto; padding-top:8px; border-top:1px solid var(--border); }
.note-del { font-size:16px; color:var(--ink4); padding:3px; border-radius:4px; transition:all var(--t); }
.note-del:hover { color:var(--error); background:var(--error-bg); }

/* Reader */
.reader-shell { flex:1; display:flex; flex-direction:column; overflow:hidden; }
.reader-bar { display:flex; align-items:center; gap:10px; padding:11px 16px; border-bottom:1.5px solid var(--border); flex-shrink:0; background:var(--bg); }
.reader-title { flex:1; font-size:15px; font-weight:700; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.reader-pages { font-size:12px; color:var(--ink4); font-weight:600; white-space:nowrap; }
.reader-body { flex:1; overflow-y:auto; padding:30px 36px; font-size:15px; line-height:1.8; color:var(--ink2); }
.reader-body h3 { font-size:20px; font-weight:800; margin:26px 0 10px; color:var(--ink); }
.reader-body h4 { font-size:16px; font-weight:700; margin:18px 0 8px; }
.reader-body p  { margin-bottom:13px; }
.reader-body ul { padding-left:20px; margin-bottom:13px; }
.reader-body li { margin-bottom:6px; list-style:disc; }
.reader-body strong { font-weight:700; }
.reader-body em     { font-style:italic; }
.reader-body pre    { background:var(--bg3); border-radius:var(--r-sm); padding:16px; overflow-x:auto; font-size:13px; margin-bottom:13px; }
.reader-body code   { background:var(--bg3); padding:2px 6px; border-radius:4px; font-size:13px; }
.reader-foot { display:flex; align-items:center; justify-content:space-between; padding:13px 16px; border-top:1.5px solid var(--border); flex-shrink:0; background:var(--bg); }
.reader-nav-ct { font-size:13px; color:var(--ink4); font-weight:600; }

/* Editor */
.editor-shell { flex:1; display:flex; flex-direction:column; overflow:hidden; }
.editor-bar { display:flex; align-items:center; gap:10px; padding:11px 16px; border-bottom:1.5px solid var(--border); flex-shrink:0; background:var(--bg); }
.editor-title-inp { flex:1; font-size:17px; font-weight:700; border:none; background:transparent; outline:none; color:var(--ink); font-family:var(--font); }
.editor-title-inp::placeholder { color:var(--ink4); }
.editor-saved-lbl { font-size:12px; color:var(--ink4); font-weight:600; white-space:nowrap; }
.editor-body-ta { flex:1; padding:26px 32px; font-size:15px; line-height:1.8; border:none; background:var(--bg); color:var(--ink2); font-family:monospace; resize:none; outline:none; }

/* ══════════════
   FLASHCARDS
   ══════════════ */
.fc-set-card { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); padding:18px; display:flex; flex-direction:column; gap:9px; cursor:pointer; transition:all var(--t); }
.fc-set-card:hover { border-color:var(--ink); box-shadow:var(--sh); }
.fc-set-icon  { width:34px; height:34px; background:var(--bg3); border-radius:var(--r-sm); display:flex; align-items:center; justify-content:center; font-size:17px; color:var(--ink3); }
.fc-set-title { font-size:15px; font-weight:700; }
.fc-set-count { font-size:12px; color:var(--ink3); }
.fc-set-footer { display:flex; align-items:center; justify-content:space-between; margin-top:auto; padding-top:8px; border-top:1px solid var(--border); }
.fc-set-date  { font-size:12px; color:var(--ink4); }
.fc-set-del   { font-size:16px; color:var(--ink4); padding:3px; border-radius:4px; transition:all var(--t); }
.fc-set-del:hover { color:var(--error); }

.fc-viewer-body { flex:1; overflow-y:auto; display:flex; flex-direction:column; align-items:center; gap:20px; padding:24px 20px; }
.fc-prog-row { display:flex; align-items:center; justify-content:space-between; width:min(540px,100%); }
.fc-prog-lbl, .fc-prog-ct { font-size:13px; font-weight:600; color:var(--ink3); }
.fc-prog-bar { width:min(540px,100%); height:5px; background:var(--bg4); border-radius:99px; overflow:hidden; }
.fc-prog-fill { height:100%; background:var(--ink); border-radius:99px; transition:width .3s var(--ease); }

.fc-bigcard { width:min(540px,100%); min-height:260px; cursor:pointer; perspective:1200px; }
.fc-inner  { width:100%; height:100%; min-height:260px; position:relative; transform-style:preserve-3d; transition:transform .45s var(--ease); border-radius:var(--r-lg); }
.fc-bigcard.flipped .fc-inner { transform:rotateY(180deg); }
.fc-face    { position:absolute; inset:0; backface-visibility:hidden; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:16px; padding:32px; border-radius:var(--r-lg); border:1.5px solid var(--border); background:var(--white); }
.fc-back    { transform:rotateY(180deg); background:var(--ink); border-color:var(--ink); }
.fc-q       { font-size:20px; font-weight:700; color:var(--ink); text-align:center; line-height:1.5; }
.fc-a       { font-size:17px; font-weight:600; color:var(--on-ink); text-align:center; line-height:1.6; }
.fc-hint    { font-size:12px; color:var(--ink4); display:flex; align-items:center; gap:5px; }
.fc-back .fc-hint { color:rgba(255,255,255,.35); }
.fc-hint i  { font-size:13px; }

.fc-nav-row { display:flex; align-items:center; justify-content:space-between; width:min(540px,100%); }
.fc-nav-ct  { font-size:14px; color:var(--ink3); font-weight:600; }
.fc-all-lbl { font-size:12px; font-weight:700; color:var(--ink3); letter-spacing:.06em; text-transform:uppercase; width:min(760px,100%); }
.fc-mini-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(180px,1fr)); gap:8px; width:min(760px,100%); }
.fc-mini-card { min-height:80px; cursor:pointer; perspective:600px; }
.fc-mini-inner { width:100%; height:100%; min-height:80px; position:relative; transform-style:preserve-3d; transition:transform .35s var(--ease); }
.fc-mini-card.flipped .fc-mini-inner { transform:rotateY(180deg); }
.fc-mini-face { position:absolute; inset:0; backface-visibility:hidden; padding:10px 12px; border-radius:var(--r-sm); border:1.5px solid var(--border); background:var(--white); display:flex; align-items:center; }
.fc-mini-back { transform:rotateY(180deg); background:var(--bg3); }
.fc-mini-q,.fc-mini-a { font-size:13px; color:var(--ink2); line-height:1.45; display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }

/* ══════════════
   QUIZ
   ══════════════ */
.setup-card { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); padding:24px; }
.setup-2col { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
@media(max-width:500px){ .setup-2col { grid-template-columns:1fr; } }

.quiz-set-card { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); padding:18px; display:flex; flex-direction:column; gap:10px; cursor:pointer; transition:all var(--t); }
.quiz-set-card:hover { border-color:var(--ink); box-shadow:var(--sh); }
.quiz-set-icon  { width:34px; height:34px; background:var(--bg3); border-radius:var(--r-sm); display:flex; align-items:center; justify-content:center; font-size:17px; color:var(--ink3); }
.quiz-set-title { font-size:15px; font-weight:700; }
.quiz-set-meta  { font-size:12px; color:var(--ink3); display:flex; gap:10px; }
.quiz-set-del   { font-size:16px; color:var(--ink4); padding:3px; border-radius:4px; transition:all var(--t); }
.quiz-set-del:hover { color:var(--error); }
.quiz-set-status { font-size:11px; font-weight:700; padding:3px 9px; border-radius:5px; }
.status-new         { background:var(--bg3);        color:var(--ink3); }
.status-in-progress { background:var(--accent-warn-bg); color:var(--accent-warn-ink); }
.status-done        { background:var(--success-bg); color:var(--success); }

/* Quiz active */
.quiz-topbar { display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; }
.quiz-counter { font-size:13px; font-weight:700; color:var(--ink3); }
.quiz-score-row { margin-bottom:14px; }
.quiz-score-lbl { font-size:13px; color:var(--ink3); }
.quiz-score-lbl strong { color:var(--ink); font-size:14px; }

.quiz-active-wrap { max-width:600px; margin:0 auto; width:100%; }
.quiz-prog-bar { height:6px; background:var(--bg4); border-radius:99px; overflow:hidden; margin-bottom:18px; }
.quiz-prog-fill { height:100%; background:var(--ink); border-radius:99px; transition:width .3s var(--ease); }
.quiz-meta-row { display:flex; justify-content:space-between; font-size:13px; color:var(--ink3); margin-bottom:20px; }
.quiz-meta-row strong { color:var(--ink); font-size:14px; }
.quiz-q-text { font-size:19px; font-weight:700; line-height:1.55; margin-bottom:22px; color:var(--ink); }

.quiz-opts   { display:flex; flex-direction:column; gap:10px; }
.quiz-opt {
  display:flex; align-items:center; gap:14px; padding:14px 16px;
  background:var(--white); border:1.5px solid var(--border); border-radius:var(--r-sm);
  font-size:15px; font-weight:500; color:var(--ink); cursor:pointer; text-align:left;
  transition:all var(--t);
}
.quiz-opt:hover:not(:disabled) { border-color:var(--ink); background:var(--bg2); transform:translateX(3px); }
.quiz-opt:disabled { cursor:default; }
.quiz-opt.correct { border-color:var(--success); background:var(--success-bg); color:var(--success); }
.quiz-opt.wrong   { border-color:var(--error);   background:var(--error-bg);   color:var(--error); }
.quiz-opt.disabled-soft { opacity:.55; }
.opt-letter { min-width:28px; height:28px; border-radius:6px; background:var(--bg3); display:flex; align-items:center; justify-content:center; font-size:12px; font-weight:800; flex-shrink:0; color:var(--ink3); transition:all var(--t); }
.quiz-opt.correct .opt-letter { background:var(--success); color:#fff; }
.quiz-opt.wrong   .opt-letter { background:var(--error);   color:#fff; }

.quiz-feedback { margin-top:16px; padding:13px 16px; border-radius:var(--r-sm); font-size:14px; font-weight:600; display:none; align-items:center; gap:9px; }
.quiz-feedback.show { display:flex; animation:slide-up .18s var(--ease); }
.quiz-feedback i { font-size:19px; }
.quiz-feedback.correct { background:var(--success-bg); color:var(--success); }
.quiz-feedback.wrong   { background:var(--error-bg);   color:var(--error); }

.quiz-explanation {
  margin-top:12px; padding:13px 16px; border-radius:var(--r-sm);
  background:var(--warn-bg); color:var(--warn); font-size:13px; line-height:1.65;
  display:flex; align-items:flex-start; gap:9px; border-left:3px solid var(--accent-amber);
  animation:slide-up .18s var(--ease);
}
.quiz-explanation i { font-size:16px; flex-shrink:0; margin-top:1px; }
.quiz-explanation.show { display:flex; }

.quiz-selected-hint {
  margin-top:12px; padding:11px 14px; border-radius:var(--r-sm); font-size:13px; font-weight:600;
  background:var(--bg3); color:var(--ink3); display:flex; align-items:center; gap:8px;
  animation:slide-up .18s var(--ease);
}
.quiz-selected-hint i { font-size:16px; color:var(--ink3); }

.quiz-nav-row { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-top:20px; }
.quiz-nav-row .btn { min-width:100px; }

/* Result */
.quiz-result-topbar { margin-bottom:24px; }
.quiz-result { text-align:center; padding:8px 0 24px; }
.quiz-result-ring { position:relative; display:inline-flex; flex-direction:column; align-items:center; justify-content:center; width:130px; height:130px; border-radius:50%; background:var(--bg3); border:4px solid var(--border); margin-bottom:18px; }
.quiz-result-score { font-size:40px; font-weight:800; letter-spacing:-2px; line-height:1; }
.quiz-result-emoji { font-size:22px; margin-top:2px; }
.quiz-result-label { font-size:22px; font-weight:800; margin-bottom:6px; }
.quiz-result-sub   { font-size:15px; color:var(--ink3); margin-bottom:24px; }
.quiz-result-actions { display:flex; justify-content:center; gap:10px; margin-bottom:32px; flex-wrap:wrap; }
.quiz-breakdown { text-align:left; }
.quiz-breakdown-title { font-size:12px; font-weight:700; color:var(--ink3); letter-spacing:.06em; text-transform:uppercase; margin-bottom:14px; }
.quiz-ans-item { display:flex; gap:13px; align-items:flex-start; padding:12px 0; border-bottom:1px solid var(--border); }
.quiz-ans-dot  { width:11px; height:11px; border-radius:50%; flex-shrink:0; margin-top:5px; }
.quiz-ans-dot.correct { background:var(--success); }
.quiz-ans-dot.wrong   { background:var(--error); }
.quiz-ans-q    { font-size:14px; font-weight:600; margin-bottom:4px; }
.quiz-ans-yours { font-size:13px; color:var(--error); margin-bottom:2px; }
.quiz-ans-right { font-size:13px; color:var(--success); margin-bottom:2px; }
.quiz-ans-explain { font-size:12px; color:var(--ink3); margin-top:5px; line-height:1.6; padding:6px 10px; background:var(--bg2); border-radius:var(--r-sm); }

/* ══════════════
   CHAT
   ══════════════ */
.chat-shell { flex:1; display:flex; flex-direction:column; overflow:hidden; }
.chat-msgs  { flex:1; overflow-y:auto; padding:20px 20px 8px; display:flex; flex-direction:column; gap:16px; }
.chat-empty { flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px; color:var(--ink4); }
.chat-empty i { font-size:42px; opacity:.3; }
.chat-empty p { font-size:15px; font-weight:500; }

.chat-msg-user { display:flex; align-items:flex-start; gap:10px; justify-content:flex-end; }
.chat-msg-user .msg-bubble { background:var(--ink); color:var(--bg); border-radius:var(--r) var(--r-xs) var(--r) var(--r); padding:12px 15px; font-size:15px; line-height:1.6; max-width:72%; }
.chat-msg-ai   { display:flex; align-items:flex-start; gap:10px; }
.ai-label { font-size:11px; font-weight:700; color:var(--ink4); letter-spacing:.06em; text-transform:uppercase; margin-bottom:5px; }
.chat-msg-ai .msg-bubble { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r-xs) var(--r) var(--r) var(--r); padding:12px 15px; font-size:15px; line-height:1.7; max-width:100%; }
.chat-avatar { width:30px; height:30px; border-radius:var(--r-sm); background:var(--ink); display:flex; align-items:center; justify-content:center; font-size:14px; color:var(--bg); flex-shrink:0; }
.chat-msg-ai .msg-bubble h3 { font-size:16px; font-weight:700; margin:10px 0 5px; }
.chat-msg-ai .msg-bubble h4 { font-size:15px; font-weight:700; margin:8px 0 4px; }
.chat-msg-ai .msg-bubble ul { padding-left:18px; margin:6px 0; }
.chat-msg-ai .msg-bubble li { margin-bottom:4px; list-style:disc; }
.chat-msg-ai .msg-bubble code { background:var(--bg3); padding:2px 6px; border-radius:4px; font-size:13px; }
.chat-msg-ai .msg-bubble pre  { background:var(--bg3); padding:14px; border-radius:var(--r-sm); overflow-x:auto; font-size:13px; margin:8px 0; }
.typing-bubble { display:flex; gap:5px; align-items:center; padding:14px 16px; }
.typing-dot    { width:7px; height:7px; border-radius:50%; background:var(--ink4); animation:typing .9s ease-in-out infinite; }
.typing-dot:nth-child(2) { animation-delay:.18s; }
.typing-dot:nth-child(3) { animation-delay:.36s; }
@keyframes typing { 0%,60%,100%{transform:translateY(0);opacity:.4} 30%{transform:translateY(-5px);opacity:1} }

.chat-chips { display:flex; gap:7px; flex-wrap:wrap; padding:0 20px 10px; }
.chip { padding:8px 14px; border-radius:8px; border:1.5px solid var(--border); font-size:13px; font-weight:600; color:var(--ink3); cursor:pointer; background:var(--white); transition:all var(--t); white-space:nowrap; }
.chip:hover { border-color:var(--ink); color:var(--ink); }

.chat-bar { display:flex; align-items:flex-end; gap:8px; padding:10px 14px; border-top:1.5px solid var(--border); background:var(--bg); flex-shrink:0; }
.chat-mic-btn { width:44px; height:44px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:18px; color:var(--ink3); border:1.5px solid var(--border); background:var(--white); flex-shrink:0; transition:all var(--t); }
.chat-mic-btn:hover { border-color:var(--ink); color:var(--ink); }
.chat-mic-btn.listening { background:var(--error); color:#fff; border-color:var(--error); animation:pulse-ring 1.2s ease-in-out infinite; }
.chat-input-ta { flex:1; border:1.5px solid var(--border); border-radius:22px; padding:10px 14px; font-size:15px; font-family:var(--font); background:var(--white); resize:none; outline:none; max-height:130px; line-height:1.55; transition:border-color var(--t); }
.chat-input-ta:focus { border-color:var(--ink); }
.chat-send-btn { width:44px; height:44px; border-radius:50%; background:var(--ink); color:var(--bg); display:flex; align-items:center; justify-content:center; font-size:17px; flex-shrink:0; transition:all var(--t); }
.chat-send-btn:hover { background:var(--ink2); }
.chat-send-btn:disabled { opacity:.4; }

/* ══════════════
   VOICE
   ══════════════ */
.voice-session-card { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); padding:16px 18px; display:flex; flex-direction:column; gap:9px; cursor:pointer; transition:all var(--t); }
.voice-session-card:hover { border-color:var(--ink); box-shadow:var(--sh); }
.vs-icon  { width:34px; height:34px; background:var(--bg3); border-radius:var(--r-sm); display:flex; align-items:center; justify-content:center; font-size:17px; color:var(--ink3); }
.vs-title { font-size:15px; font-weight:700; }
.vs-meta  { font-size:12px; color:var(--ink3); }
.vs-footer { display:flex; align-items:center; justify-content:space-between; }
.vs-del   { font-size:16px; color:var(--ink4); padding:3px; border-radius:4px; transition:all var(--t); }
.vs-del:hover { color:var(--error); }

/* Voice player */
.voice-player-body { flex:1; overflow-y:auto; padding:24px; display:flex; flex-direction:column; }
.audio-single-wrap { max-width:700px; margin:0 auto; width:100%; display:flex; flex-direction:column; gap:16px; animation:fade-in .2s var(--ease); }

.audio-hero { display:flex; align-items:center; gap:16px; padding:20px; background:var(--ink); border-radius:var(--r-lg); color:#fff; }
.audio-hero-icon { width:52px; height:52px; border-radius:var(--r); background:rgba(255,255,255,.12); display:flex; align-items:center; justify-content:center; font-size:26px; flex-shrink:0; }
.audio-hero-info { flex:1; min-width:0; }
.audio-hero-title { font-size:18px; font-weight:800; letter-spacing:-.3px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.audio-hero-meta { display:flex; gap:14px; margin-top:5px; }
.audio-hero-meta span { font-size:12px; color:rgba(255,255,255,.6); display:flex; align-items:center; gap:5px; }
.audio-hero-meta i { font-size:13px; }

.audio-player-card { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); padding:20px; }
.audio-player-el { width:100%; border-radius:var(--r-sm); }

/* Animated waveform */
.audio-waveform { display:flex; align-items:center; justify-content:center; gap:3px; height:48px; margin-bottom:16px; }
.waveform-bar { width:4px; border-radius:99px; background:var(--border2); transition:background .3s; animation:none; }
.audio-waveform.playing .waveform-bar { background:var(--ink); animation:wave var(--wh,0.8s) ease-in-out infinite; }
.waveform-bar:nth-child(odd)  { --wh: 0.7s; }
.waveform-bar:nth-child(even) { --wh: 1.0s; }
.waveform-bar:nth-child(3n)   { --wh: 0.6s; }
@keyframes wave {
  0%,100% { height:6px;  }
  50%     { height:36px; }
}

.audio-unavail { font-size:13px; color:var(--ink4); display:flex; align-items:center; gap:7px; padding:6px 0; }
.audio-unavail i { font-size:16px; }

.audio-transcript-toggle { align-self:flex-start; gap:7px; font-size:13px; }
.audio-transcript { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); overflow:hidden; animation:slide-up .16s var(--ease); }
.audio-transcript-body { padding:20px; font-size:14px; line-height:1.85; color:var(--ink2); white-space:pre-wrap; max-height:420px; overflow-y:auto; }

/* Voice live */
.voice-live-wrap { max-width:500px; margin:0 auto; display:flex; flex-direction:column; align-items:center; gap:22px; padding-top:24px; width:100%; }
.voice-orb { width:96px; height:96px; border-radius:50%; background:var(--ink); display:flex; align-items:center; justify-content:center; font-size:34px; color:#fff; cursor:pointer; transition:all var(--t); box-shadow:var(--sh); }
.voice-orb.listening { background:var(--error); animation:pulse-ring 1.2s ease-in-out infinite; }
.voice-orb.thinking  { background:var(--accent-violet); }
.voice-orb.speaking  { background:var(--success); }
.voice-orb:hover     { transform:scale(1.05); }
.voice-status-txt { font-size:15px; font-weight:600; color:var(--ink3); }
.voice-transcript-box { width:100%; background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); padding:18px; min-height:140px; max-height:300px; overflow-y:auto; }
.voice-empty-txt  { font-size:14px; color:var(--ink4); font-style:italic; }
.voice-turn       { margin-bottom:14px; }
.voice-turn-label { font-size:11px; font-weight:700; color:var(--ink4); text-transform:uppercase; letter-spacing:.06em; margin-bottom:5px; }
.voice-turn.user .voice-turn-label { color:var(--ink2); }
.voice-turn-text  { font-size:14px; line-height:1.65; }

/* ══════════════
   SUMMARY
   ══════════════ */
.summary-card { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); overflow:hidden; margin-bottom:14px; }
.summary-card-head { display:flex; align-items:center; justify-content:space-between; padding:15px 18px; border-bottom:1px solid var(--border); gap:10px; }
.summary-card-head h4 { font-size:16px; font-weight:700; }
.summary-card-body { padding:20px; font-size:15px; line-height:1.8; color:var(--ink2); }
.summary-card-body h3 { font-size:17px; font-weight:800; margin:18px 0 9px; color:var(--ink); }
.summary-card-body strong { font-weight:700; }
.summary-card-body ul { padding-left:20px; margin:9px 0; }
.summary-card-body li { margin-bottom:6px; list-style:disc; }

/* ══════════════
   STUDY PLAN
   ══════════════ */
.mindmap-config { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); padding:24px; margin-bottom:24px; }
.mindmap-config h3 { font-size:19px; font-weight:800; margin-bottom:6px; }
.mindmap-config .sub { font-size:14px; color:var(--ink3); margin-bottom:18px; }
.mindmap-config-grid { display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-bottom:18px; }
@media(max-width:500px){ .mindmap-config-grid { grid-template-columns:1fr; } }
.mindmap-session-card { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r-sm); padding:14px 16px; display:flex; align-items:center; justify-content:space-between; cursor:pointer; transition:all var(--t); gap:10px; margin-bottom:8px; }
.mindmap-session-card:hover { border-color:var(--ink); }
.card-icon  { width:34px; height:34px; background:var(--bg3); border-radius:var(--r-sm); display:flex; align-items:center; justify-content:center; font-size:17px; color:var(--ink3); flex-shrink:0; }
.card-title { font-size:14px; font-weight:700; }
.card-meta  { font-size:12px; color:var(--ink3); }
.card-del   { font-size:16px; color:var(--ink4); padding:4px; border-radius:4px; transition:all var(--t); flex-shrink:0; }
.card-del:hover { color:var(--error); }

.roadmap-wrap { max-width:700px; }
.roadmap-day  { display:flex; gap:0; animation:slide-up .2s var(--ease) both; }
.rd-marker-col { display:flex; flex-direction:column; align-items:center; margin-right:18px; flex-shrink:0; }
.rd-dot { width:30px; height:30px; border-radius:50%; background:var(--ink); color:#fff; font-size:11px; font-weight:700; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.rd-dot.milestone { background:var(--accent-violet); width:34px; height:34px; box-shadow:0 0 0 4px var(--accent-violet-bg); }
.rd-line { flex:1; width:2px; background:var(--border2); margin:4px 0; min-height:24px; }
.rd-content { flex:1; padding-bottom:22px; padding-top:3px; }
.rd-day-label { font-size:11px; font-weight:700; color:var(--ink4); text-transform:uppercase; letter-spacing:.08em; margin-bottom:4px; }
.rd-day-title { font-size:16px; font-weight:700; margin-bottom:6px; }
.rd-focus     { font-size:14px; color:var(--ink3); margin-bottom:9px; }
.rd-tasks     { display:flex; flex-direction:column; gap:6px; margin-bottom:9px; }
.rd-task      { font-size:13px; color:var(--ink2); padding:6px 11px; background:var(--bg2); border-radius:var(--r-sm); line-height:1.45; }
.rd-duration  { font-size:12px; color:var(--ink4); display:flex; align-items:center; gap:5px; margin-top:5px; }
.rd-duration i { font-size:13px; }
.rd-milestone-badge { display:inline-flex; align-items:center; gap:5px; font-size:12px; font-weight:700; color:var(--accent-violet); background:var(--accent-violet-bg); padding:4px 10px; border-radius:99px; margin-top:7px; }

/* ══════════════
   SETTINGS
   ══════════════ */
.sblock { background:var(--white); border:1.5px solid var(--border); border-radius:var(--r); margin-bottom:12px; overflow:visible; }
/* Use clip path on head only for border-radius, not overflow on parent */
.sblock-head { display:flex; align-items:flex-start; gap:13px; padding:16px 18px; border-bottom:1px solid var(--border); background:var(--bg2); border-radius:var(--r) var(--r) 0 0; }
.sblock-head > i { font-size:22px; color:var(--ink3); margin-top:1px; flex-shrink:0; }
.sblock-title { font-size:15px; font-weight:700; }
.sblock-sub   { font-size:13px; color:var(--ink3); margin-top:2px; }
.sblock-body  { padding:18px; display:flex; flex-direction:column; gap:14px; overflow:visible; border-radius:0 0 var(--r) var(--r); }
.srow { display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; }
.srow-label { font-size:14px; font-weight:600; }
.srow-sub   { font-size:13px; color:var(--ink3); margin-top:2px; }

/* ══════════════
   SHARED helpers
   ══════════════ */
.section-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:12px; }
.section-header h4 { font-size:15px; font-weight:700; }
.tag { display:inline-flex; align-items:center; gap:4px; padding:3px 9px; border-radius:99px; font-size:12px; font-weight:600; background:var(--bg3); color:var(--ink3); }
.anim-up { animation:slide-up .2s var(--ease) both; }
.link { cursor:pointer; text-decoration:underline; }

/* ══════════════════════════════
   HOME — Overview dashboard
   ══════════════════════════════ */
.overview-wrap { max-width:900px; margin:0 auto; padding:0 0 40px; }

/* Header row: "Overview" title + workspace switch */
.overview-header {
  display:flex; align-items:flex-start; justify-content:space-between;
  margin-bottom:22px; gap:12px;
}
.overview-title {
  font-size:26px; font-weight:800; letter-spacing:-.5px; color:var(--ink); line-height:1;
}
.overview-ws-name {
  font-size:13px; color:var(--ink3); margin-top:5px; font-weight:500;
}
.overview-switch-btn {
  display:flex; align-items:center; gap:5px; padding:7px 12px;
  border:1.5px solid var(--border); border-radius:9px;
  font-size:12px; font-weight:600; color:var(--ink3); background:var(--white);
  cursor:pointer; transition:all var(--t); flex-shrink:0; white-space:nowrap;
}
.overview-switch-btn:hover { border-color:var(--ink); color:var(--ink); background:var(--bg2); }
.overview-switch-btn i { font-size:14px; }

/* 2×2 stat grid */
.dash-stat-grid {
  display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:20px;
}
.dash-stat-card {
  background:var(--white); border:1.5px solid var(--border); border-radius:var(--r-lg);
  padding:18px; display:flex; flex-direction:column; gap:6px; text-align:left;
  cursor:pointer; transition:all var(--t); align-items:flex-start;
  box-shadow:var(--sh-xs);
}
.dash-stat-card:hover { border-color:var(--ink); box-shadow:var(--sh); transform:translateY(-2px); }
.dash-stat-icon {
  width:42px; height:42px; border-radius:20%; border:1.5px solid var(--border); display:flex;
  align-items:center; justify-content:center; font-size:20px;
  margin-bottom:6px; flex-shrink:0;
}
.dash-stat-label { font-size:12px; color:var(--ink3); font-weight:600; text-transform:uppercase; letter-spacing:.06em; }
.dash-stat-value { font-size:32px; font-weight:800; letter-spacing:-1.5px; color:var(--ink); line-height:1; }
.dash-stat-sub   { font-size:12px; color:var(--ink4); font-weight:500; }

/* Tools section */
.dash-tools-section { margin-bottom:20px; }
.dash-recent-section { }

.dash-tools-header {
  display:flex; align-items:center; justify-content:space-between; margin-bottom:12px;
}
.dash-tools-title { font-size:16px; font-weight:800; color:var(--ink); }
.dash-tools-sub   { font-size:12px; color:var(--ink4); font-weight:500; }

/* Tool rows — like the "Project summary" table in the image */
.dash-tools-list {
  background:var(--white); border:1.5px solid var(--border);
  border-radius:var(--r-lg); overflow:hidden; box-shadow:var(--sh-xs);
}
.dash-tool-row {
  display:flex; align-items:center; gap:13px; padding:14px 16px;
  border-bottom:1px solid var(--border); cursor:pointer;
  text-align:left; width:100%; transition:background var(--t);
}
.dash-tool-row:last-child { border-bottom:none; }
.dash-tool-row:hover { background:var(--bg2); }
.dash-tool-ico {
  width:40px; height:40px; border-radius:var(--r-sm); display:flex;
  align-items:center; justify-content:center; font-size:19px; flex-shrink:0;
}
.dash-tool-info { flex:1; min-width:0; }
.dash-tool-name { font-size:14px; font-weight:700; color:var(--ink); }
.dash-tool-desc { font-size:12px; color:var(--ink3); margin-top:2px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.dash-tool-arrow { font-size:18px; color:var(--ink4); flex-shrink:0; }

/* ══════════════════════════════
   PROFILE PAGE
   ══════════════════════════════ */
.profile-hero {
  display:flex; align-items:center; gap:16px;
  padding:24px; background:var(--white); border:1.5px solid var(--border);
  border-radius:var(--r-lg); margin-bottom:14px; box-shadow:var(--sh-xs);
}
.profile-hero-info { flex:1; min-width:0; }
.profile-name { font-size:20px; font-weight:800; letter-spacing:-.3px; }
.profile-sub  { font-size:13px; color:var(--ink3); margin-top:3px; }

/* Avatar picker */
.avatar-picker {
  display:flex; flex-wrap:wrap; gap:8px; padding:4px 0;
}
.avatar-picker span {
  width:36px; height:36px; border-radius:50%;
  background:var(--bg3); color:var(--ink3); font-size:14px; font-weight:700;
  display:flex; align-items:center; justify-content:center; cursor:pointer;
  border:2px solid transparent; transition:all var(--t);
}
.avatar-picker span:hover { border-color:var(--ink3); color:var(--ink); background:var(--bg4); }
.avatar-picker span.active { background:var(--ink); color:var(--bg); border-color:var(--ink); }

/* Profile stats grid */
.profile-stats-grid {
  display:grid; grid-template-columns:repeat(3,1fr); gap:10px;
}
@media(max-width:480px) { .profile-stats-grid { grid-template-columns:repeat(2,1fr); } }
.profile-stat-card {
  background:var(--bg2); border:1.5px solid var(--border);
  border-radius:var(--r); padding:14px 10px; text-align:center;
}
.profile-stat-value { font-size:28px; font-weight:800; letter-spacing:-1px; color:var(--ink); }
.profile-stat-label { font-size:11px; color:var(--ink3); font-weight:600; margin-top:4px; text-transform:uppercase; letter-spacing:.05em; }

/* ══════════════
   DARK MODE tweaks for specific elements
   ══════════════ */
[data-theme="dark"] .dash-stat-card,
[data-theme="dark"] .dash-tools-list,
[data-theme="dark"] .profile-hero { box-shadow:none; }
[data-theme="dark"] .overview-switch-btn { background:var(--bg2); }

/* ══════════════════════════════
   SOURCE VIEWER
   ══════════════════════════════ */
.sv-reader-body {
  background: var(--white);
}
/* Plain text files — monospace, readable */
.sv-plain-text {
  font-family: 'Courier New', Courier, monospace;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink2);
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
  padding: 0;
  background: transparent;
}
/* Extension tag in reader bar */
.sv-ext-tag {
  margin-left: auto;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: 10px;
  background: var(--bg3);
  color: var(--ink3);
  border-radius: var(--r-xs);
  padding: 2px 7px;
}

/* ══════════════════════════════
   MATH / KATEX STYLING
   ══════════════════════════════ */
.math-block {
  overflow-x: auto;
  padding: 12px 16px;
  margin: 16px 0;
  background: var(--bg2);
  border-radius: var(--r-sm);
  border-left: 3px solid var(--border2);
  text-align: center;
}
.math-block .katex-display { margin: 0; }
.katex { font-size: 1.05em; }

/* ══════════════════════════════
   CHAT — LaTeX in bubbles
   ══════════════════════════════ */
.msg-bubble .math-block {
  background: var(--bg3);
  border-left-color: var(--accent-blue);
  margin: 10px 0;
  padding: 10px 14px;
}
.msg-bubble .katex { font-size: 1em; }

/* ══════════════════════════════
   READER — enhanced prose styles
   ══════════════════════════════ */
.reader-body h3 { font-size: 19px; font-weight: 800; margin: 22px 0 10px; color: var(--ink); }
.reader-body h4 { font-size: 16px; font-weight: 700; margin: 18px 0 8px; color: var(--ink2); }
.reader-body h5 { font-size: 14px; font-weight: 700; margin: 14px 0 6px; color: var(--ink3); text-transform: uppercase; letter-spacing: .04em; }
.reader-body p  { margin: 0 0 10px; line-height: 1.75; }
.reader-body ul, .reader-body ol { padding-left: 20px; margin: 8px 0 14px; }
.reader-body li { margin: 5px 0; line-height: 1.65; }
.reader-body blockquote {
  border-left: 3px solid var(--ink3);
  margin: 14px 0; padding: 10px 16px;
  background: var(--bg2); border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--ink2); font-style: italic;
}
.reader-body table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 13px; }
.reader-body th { background: var(--bg3); font-weight: 700; padding: 9px 12px; text-align: left; border: 1px solid var(--border); }
.reader-body td { padding: 8px 12px; border: 1px solid var(--border); }
.reader-body tr:nth-child(even) td { background: var(--bg2); }
.reader-body code { background: var(--bg3); padding: 2px 6px; border-radius: var(--r-xs); font-size: 12px; font-family: 'Courier New', monospace; }
.reader-body pre { background: var(--bg3); padding: 14px 16px; border-radius: var(--r-sm); overflow-x: auto; margin: 12px 0; }
.reader-body pre code { background: none; padding: 0; }
.reader-body strong { font-weight: 700; color: var(--ink); }
.reader-body hr.page-break { border: none; border-top: 2px dashed var(--border2); margin: 28px 0; opacity: .5; }
.content-loading { display: flex; align-items: center; justify-content: center; padding: 60px 24px; }

/* ══════════════════════════════
   LaTeX + Markdown rendered content
   ══════════════════════════════ */
/* Loading placeholder */
.content-loading {
  display:flex; align-items:center; justify-content:center;
  padding:60px 20px; color:var(--ink4);
}

/* Page breaks from --- */
.reader-body hr.page-break,
.reader-body hr {
  border:none; border-top:2px dashed var(--border2);
  margin:28px 0; opacity:.6;
}

/* Display math blocks */
.reader-body .math-block {
  display:block; overflow-x:auto; padding:16px 0;
  text-align:center; margin:16px 0;
}
.reader-body .katex-display {
  overflow-x:auto; overflow-y:hidden;
  margin:14px 0;
}

/* Markdown tables */
.reader-body .md-table {
  width:100%; border-collapse:collapse;
  margin:16px 0; font-size:14px;
}
.reader-body .md-table th,
.reader-body .md-table td {
  padding:9px 13px; border:1.5px solid var(--border);
  text-align:left; line-height:1.5;
}
.reader-body .md-table th {
  background:var(--bg2); font-weight:700;
  font-size:12px; letter-spacing:.04em; text-transform:uppercase;
}
.reader-body .md-table tr:nth-child(even) td { background:var(--bg); }

/* Blockquotes — callouts */
.reader-body blockquote {
  border-left:3px solid var(--ink3);
  background:var(--bg2); padding:12px 16px;
  margin:14px 0; border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:14px; color:var(--ink2);
}
/* Key formula callout */
.reader-body blockquote strong:first-child { color:var(--ink); }

/* Ordered lists */
.reader-body ol {
  padding-left:20px; margin:8px 0 14px; counter-reset:none;
}
.reader-body ol li { list-style:decimal; margin-bottom:6px; }

/* del strikethrough */
.reader-body del { text-decoration:line-through; color:var(--ink4); }

/* Links */
.reader-body a { color:var(--accent-blue); text-decoration:underline; }

/* KaTeX overrides for theme */
[data-theme="dark"] .katex { color:var(--ink); }

/* ══════════════════════════════
   SOURCE VIEWER
   ══════════════════════════════ */
.src-viewer-body {
  background:var(--bg);
}
.src-viewer-pre {
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size:13px; line-height:1.7; color:var(--ink2);
  white-space:pre-wrap; word-break:break-word;
  background:var(--bg); padding:0; margin:0;
}

/* View button on source items */
.src-view-btn { margin-right:2px; }

/* ══════════════════════════════
   SUMMARY READER — same as notes, no extra needed
   reader-shell/bar/body/foot shared
   ══════════════════════════════ */