/* ===== PATCH SET additions ===== */
.vision-badge{font:600 9px var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:2px 6px;border-radius:6px;border:1px solid var(--line2);color:var(--soft)}
.vision-badge.on{color:var(--ok);border-color:var(--ok)}
.vision-badge.off{color:var(--dim);opacity:.7}
.study-view[data-view="dashboard"] .dash-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(340px,100%),1fr));gap:14px;padding:18px 22px 40px}
.dash-card{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:14px 16px;display:flex;flex-direction:column;gap:8px;min-width:0}
.dash-card h4{font:italic 600 16px var(--serif);color:var(--ink);margin:0;display:flex;align-items:center;gap:8px}
.dash-card h4 .count{font:600 10px var(--mono);color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);border-radius:99px;padding:1px 8px}
.dash-row{display:flex;align-items:center;gap:10px;padding:7px 8px;border-radius:8px;cursor:pointer;border:1px solid transparent}
.dash-row:hover{background:var(--panel2);border-color:var(--line)}
.dash-row .nm{flex:1;min-width:0;font:500 13px var(--sans);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dash-row .mt{font:11px var(--mono);color:var(--soft);flex:none}
.dash-empty{padding:10px 4px;color:var(--soft);font:12.5px var(--sans)}
.dash-qa{display:flex;flex-wrap:wrap;gap:8px;padding:14px 22px 0}

.calc-fab{position:fixed;right:18px;bottom:18px;z-index:640;width:44px;height:44px;border-radius:50%;border:1px solid var(--border-s);background:var(--surface);color:var(--fg);display:none;place-items:center;cursor:pointer;box-shadow:var(--shadow)}
.calc-fab.show{display:grid}
.calc-fab:hover{border-color:var(--accent);color:var(--accent)}
.calc-panel{position:fixed;right:18px;bottom:74px;z-index:641;width:260px;background:var(--panel);border:1px solid var(--line2);border-radius:12px;box-shadow:var(--shadow);padding:12px;display:none;font-family:var(--sans)}
.calc-panel.show{display:block}
.calc-panel .cdisp{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:8px 10px;text-align:right;font:600 20px var(--mono);color:var(--fg);margin-bottom:8px;overflow-x:auto;white-space:nowrap}
.calc-panel .cg{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.calc-panel button{padding:9px 0;border-radius:8px;border:1px solid var(--line);background:var(--surface-2);color:var(--fg);font:600 13px var(--sans);cursor:pointer;transition:background .12s,border-color .12s}
.calc-panel button:hover{border-color:var(--accent);color:var(--accent)}
.calc-panel button.wide{grid-column:span 2}
.calc-panel button.eq{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.calc-panel .crow{display:flex;gap:6px;justify-content:flex-end;margin-top:6px;font:11px var(--mono);color:var(--soft)}

.exam-shell{flex:1;display:flex;min-height:0;overflow:hidden}
.exam-main{flex:1;min-width:0;display:flex;flex-direction:column;background:var(--paper)}
.exam-bar{display:flex;align-items:center;gap:10px;padding:8px 14px;border-bottom:1px solid var(--line);background:var(--surface);flex:none;flex-wrap:wrap}
.exam-timer{font:700 16px var(--mono);color:var(--fg);padding:4px 10px;border:1px solid var(--line);border-radius:8px}
.exam-timer.warn{color:var(--err);border-color:var(--err)}
.exam-body{flex:1;overflow:auto;padding:22px 26px}
.exam-q{max-width:820px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 22px}
.exam-q h3{margin:0 0 4px;font:italic 600 20px var(--serif)}
.exam-q .qmeta{font:11px var(--mono);color:var(--soft);margin-bottom:12px}
.exam-aside{width:220px;border-left:1px solid var(--line);padding:12px 10px;overflow:auto;background:var(--surface);flex:none}
.exam-aside h5{margin:0 0 8px;font:600 10px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--soft)}
.exam-pal{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.exam-pal button{aspect-ratio:1;border-radius:8px;border:1px solid var(--line);background:var(--surface-2);color:var(--fg);font:600 12px var(--mono);cursor:pointer}
.exam-pal button.answered{background:color-mix(in srgb,var(--ok) 24%,var(--surface-2));border-color:var(--ok)}
.exam-pal button.marked{background:color-mix(in srgb,var(--warn) 28%,var(--surface-2));border-color:var(--warn)}
.exam-pal button.cur{outline:2px solid var(--accent);outline-offset:-2px}
.exam-nav{display:flex;gap:10px;justify-content:space-between;margin-top:18px;max-width:820px;margin-left:auto;margin-right:auto}
.exam-cfg{max-width:760px;margin:20px auto;padding:22px 24px;background:var(--panel);border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;gap:12px}
.exam-cfg h2{margin:0;font:italic 600 24px var(--serif)}
.exam-cfg .row{display:flex;gap:12px;flex-wrap:wrap}
.exam-cfg .row>*{flex:1;min-width:160px}
@media(max-width:820px){
  .exam-aside{position:absolute;right:0;top:0;bottom:0;z-index:8;transform:translateX(102%);transition:transform .25s;box-shadow:var(--shadow);max-width:280px}
  .exam-aside.open{transform:none}
  .exam-body{padding:14px}
}

.mist-wrap{max-width:900px;margin:0 auto;padding:16px 0 40px}
.mist-row{border:1px solid var(--line);border-radius:10px;background:var(--panel);padding:12px 14px;margin-bottom:10px}
.mist-row .qhead{font:600 13.5px var(--sans);color:var(--fg);margin-bottom:6px}
.mist-row .verdict{font:600 10px var(--mono);letter-spacing:.08em;text-transform:uppercase;padding:2px 7px;border-radius:6px;margin-right:8px}
.mist-row .verdict.bad{background:color-mix(in srgb,var(--err) 18%,var(--surface-2));color:var(--err)}
.mist-row .verdict.part{background:color-mix(in srgb,var(--warn) 22%,var(--surface-2));color:var(--warn)}
.mist-row .verdict.good{background:color-mix(in srgb,var(--ok) 22%,var(--surface-2));color:var(--ok)}
.mist-row .kv{font:12.5px var(--sans);color:var(--soft);margin:3px 0}
.mist-row .kv b{color:var(--fg)}
.mist-row .tagnote{display:inline-flex;gap:6px;font:10.5px var(--mono);margin-top:6px}
.mist-row .tagnote span{padding:1px 7px;border-radius:6px;border:1px solid var(--line2);color:var(--soft)}

.htmlview-bar{display:flex;align-items:center;gap:10px;padding:8px 14px;border-bottom:1px solid var(--border);background:var(--surface);flex:none;flex-wrap:wrap}
.htmlview-bar input[type=text]{flex:1;min-width:180px}
.htmlview-frame{flex:1;border:0;background:#fff;width:100%}
.htmlview-wrap{flex:1;position:relative;display:flex;min-height:0}
.htmlview-wrap.zoomed .htmlview-frame{transform-origin:0 0}
/* ===== HTML viewer: folder tree layout ===== */
.htmlview-body{flex:1;display:flex;min-height:0;overflow:hidden}
.html-tree{width:240px;flex:none;border-right:1px solid var(--line);background:var(--surface);display:flex;flex-direction:column;min-height:0;overflow:hidden}
.html-tree[hidden]{display:none!important}
.html-tree-head{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--line);flex:none}
.html-tree-head .lbl{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin:0}
.html-tree-head .ibtn.sm{width:24px;height:24px;min-width:24px;min-height:24px;padding:0}
.html-tree-list{flex:1;overflow:auto;padding:6px;min-height:0}
.html-tree-item{display:flex;align-items:center;gap:6px;width:100%;text-align:left;border:none;background:none;padding:5px 9px;border-radius:6px;color:var(--fg);cursor:pointer;font:500 12.5px var(--sans);overflow:hidden;min-width:0}
.html-tree-item:hover{background:var(--surface-2)}
.html-tree-item.on{background:color-mix(in srgb,var(--accent) 14%,transparent);color:var(--accent)}
.html-tree-item.dir{color:var(--soft);font-weight:600}
.html-tree-item.disabled{opacity:.5;cursor:default}
.html-tree-item.disabled:hover{background:none}
.html-tree-icon{flex:none;width:13px;height:13px;display:inline-flex;align-items:center;justify-content:center;color:var(--soft)}
.html-tree-item.on .html-tree-icon{color:var(--accent)}
.html-tree-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media (max-width:820px){
  .htmlview-body{flex-direction:column}
  .html-tree{width:100%;border-right:none;border-bottom:1px solid var(--line);max-height:34vh}
}

.ocr-prog{font:12px var(--mono);color:var(--soft);padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface-2);margin-top:8px;display:none}
.ocr-prog.show{display:block}
.ocr-prog .b{height:6px;border-radius:99px;background:var(--surface-3);margin-top:6px;overflow:hidden}
.ocr-prog .b i{display:block;height:100%;background:var(--accent);width:0;transition:width .2s}

.nt-badge{font:600 9px var(--mono);letter-spacing:.06em;text-transform:uppercase;padding:1px 6px;border-radius:6px;border:1px solid var(--line2);color:var(--soft);margin-left:8px}
.dg-legend{position:absolute;left:14px;top:14px;z-index:5;max-width:280px;max-height:calc(100% - 28px);overflow:auto;background:color-mix(in srgb,var(--surface) 82%,transparent);backdrop-filter:blur(12px);border:1px solid var(--line2);border-radius:10px;padding:8px;box-shadow:var(--shadow);font:12px var(--sans)}
.dg-legend-title{font:600 10px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--dim);padding:2px 4px 6px}
.dg-legend-item{display:flex;flex-direction:column;gap:2px;width:100%;text-align:left;border:none;background:none;color:var(--fg);padding:6px 8px;border-radius:7px;cursor:pointer}
.dg-legend-item:hover{background:var(--panel2)}
.dg-legend-item b{font:600 12px var(--sans);color:var(--accent)}
.dg-legend-item span{font:11.5px var(--sans);color:var(--soft);line-height:1.4;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
@media(max-width:820px){
  .dg-legend{left:auto;right:8px;top:auto;bottom:8px;max-width:60vw;max-height:40vh}
}
.res-list{display:flex;flex-direction:column;gap:12px;margin-top:14px}
.res-list .cres{padding:16px 18px;margin-top:0}
.res-list .cres:first-child{border-color:color-mix(in srgb,var(--accent) 35%,var(--line))}
/* ===== Home page: collapsible Study Desk ===== */
#homeDesk{margin:22px auto 6px;max-width:62rem;border:1px solid var(--border);border-radius:14px;background:color-mix(in srgb,var(--surface) 62%,transparent);backdrop-filter:blur(12px);overflow:hidden;text-align:left}
.desk-toggle{display:flex;align-items:center;gap:12px;width:100%;padding:14px 18px;background:none;border:none;color:var(--fg);cursor:pointer;font-family:inherit;text-align:left;transition:background .15s}
.desk-toggle:hover{background:color-mix(in srgb,var(--accent) 6%,transparent)}
.desk-toggle .desk-ico{width:18px;height:18px;flex:none;color:var(--accent)}
.desk-toggle .desk-label{font:600 15px var(--sans);color:var(--fg);flex:none}
.desk-toggle .desk-hint{font:12px var(--sans);color:var(--muted);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.desk-toggle .desk-chev{width:16px;height:16px;flex:none;color:var(--muted);transition:transform .22s cubic-bezier(.2,.8,.2,1)}
#homeDesk.open .desk-chev{transform:rotate(180deg)}
#homeDesk .desk-body{padding:0 18px 14px;border-top:1px solid var(--border)}
#homeDesk .dash-qa{padding:14px 0 0;gap:8px;flex-wrap:wrap}
#homeDeskGrid.dash-grid{grid-template-columns:repeat(auto-fill,minmax(min(280px,100%),1fr));gap:12px;padding:14px 0 4px}
@media(max-width:720px){
  #homeDesk{margin:16px auto 4px}
  .desk-toggle .desk-hint{display:none}
  .desk-toggle{padding:12px 14px}
  #homeDesk .desk-body{padding:0 14px 12px}
}
/* ===== Hideable study rail ===== */
.shell.rail-hidden .rail{display:none !important}
#railToggle svg{transition:opacity .15s}
.shell.rail-hidden #railToggle svg{opacity:.45}
.shell.rail-hidden #railToggle:hover svg{opacity:1}
/* On phones: the rail starts hidden by default the first time; tap the toggle to reveal. */
@media (max-width:720px){
  .shell.rail-hidden .rail{display:none !important}
}
.nb-banner{display:flex;flex-wrap:wrap;gap:8px;align-items:center;width:min(1060px,calc(100% - 24px));margin:10px auto 2px;padding:8px 12px;border:1px solid var(--border,hsla(0,0%,55%,.35));border-radius:12px;background:linear-gradient(135deg,hsla(var(--acc-h,204),var(--acc-s,100%),var(--acc-l,55%),.12),hsla(var(--acc-h,204),var(--acc-s,100%),var(--acc-l,55%),.04));font-size:.82rem}
.nb-banner .nb-crumb{font-weight:600;color:var(--acc-ink,var(--ink,#111))}
.nb-banner .nb-info{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink,#111);opacity:.85}
.nb-banner .nb-info strong{font-weight:600;opacity:1}
/* ============ Connection badge (top bar, far right) ============ */
.net-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:99px;border:1px solid var(--border);background:var(--surface-2);color:var(--muted);font:600 11px var(--mono);letter-spacing:.04em;cursor:pointer;transition:all .18s;flex:none}
[data-skin="paper"] .net-badge,
[data-skin="comfy"] .net-badge,
[data-skin="contrast"] .net-badge{
  background:color-mix(in srgb,var(--surface) 92%,var(--surface-2));
  border-color:var(--border);
  color:var(--soft);
}
[data-skin="paper"] .net-badge .net-dot,
[data-skin="comfy"] .net-badge .net-dot,
[data-skin="contrast"] .net-badge .net-dot{
  box-shadow:0 0 0 2px color-mix(in srgb,var(--ok) 24%,transparent);
}
.net-badge:hover{border-color:var(--border-s);color:var(--fg)}
.net-badge .net-dot{width:8px;height:8px;border-radius:50%;background:var(--ok);flex:none;box-shadow:0 0 0 2px color-mix(in srgb,var(--ok) 22%,transparent);transition:background .18s,box-shadow .18s}
.net-badge .net-text{white-space:nowrap}
.net-badge.offline{border-color:color-mix(in srgb,var(--err) 55%,var(--border));background:color-mix(in srgb,var(--err) 10%,var(--surface-2));color:var(--err)}
.net-badge.offline .net-dot{background:var(--err);box-shadow:0 0 0 2px color-mix(in srgb,var(--err) 28%,transparent);animation:netPulse 1.8s ease-in-out infinite}
.net-badge.recheck{border-color:var(--accent);color:var(--accent)}
.net-badge.recheck .net-dot{background:var(--accent);animation:netSpin .8s linear infinite}
@keyframes netPulse{0%,100%{opacity:1}50%{opacity:.4}}
@keyframes netSpin{to{transform:rotate(360deg)}}
@media (max-width:720px){
  /* ===== Top navigation: one tight row on phones ===== */
  .top-nav{
    gap:6px;
    padding-left:calc(10px + env(safe-area-inset-left,0px));
    padding-right:calc(10px + env(safe-area-inset-right,0px));
  }
  .brand{font-size:22px;height:52px}
  .brand .brand-back{width:20px;height:20px;margin-right:4px}
  .top-nav .ibtn{width:40px;height:40px;min-width:40px;min-height:40px}
  .top-nav .ibtn svg{width:17px;height:17px}
  .top-nav .net-badge{padding:5px 7px}
  .net-badge .net-text{display:none} /* dot alone on phones */
  .net-badge .net-dot{width:9px;height:9px}
  /* The AI model select flexes so it never squeezes the icons. */
  .ai-model-select{
    flex:1 1 60px;
    min-width:0;
    max-width:140px;
    font-size:11px;
    padding:6px 8px;
  }
  /* ===== Home page: breathe less on a small screen ===== */
  #view-home > div{padding-left:14px !important;padding-right:14px !important}
  .hero-title{font-size:clamp(42px,14vw,60px)}
  .hero-sub{font-size:14px;margin-top:10px}
  .hero-note{font-size:9.5px;letter-spacing:.12em;margin-top:14px}
  .cat-label{margin-top:18px;margin-bottom:8px;font-size:11px}
  /* ===== Tool cards: more room for the title ===== */
  .tool-card{padding:12px;gap:10px;backdrop-filter:none;background:var(--surface)}
  .tool-card .tc-icon{width:34px;height:34px;border-radius:8px}
  .tool-card .tc-icon svg{width:17px;height:17px}
  .tool-card h3{font-size:13px}
  .tool-card p{font-size:10.5px}
  /* No hover-lift on touch — use a press state instead. */
  .tool-card:hover{transform:none;border-color:var(--border);background:var(--surface)}
  .tool-card:active{transform:scale(.985);border-color:var(--accent)}
  /* ===== Study view: slim top bar ===== */
  #view-study .topbar{gap:6px;padding:0 8px;min-height:48px}
  #view-study .brand{font-size:16px;padding-bottom:2px}
  #view-study .brand .scrawl{display:none}
  .top-actions .btn{padding:6px 10px;font-size:12px}
  .top-actions .ibtn{width:36px;height:36px;min-width:36px;min-height:36px}
  .top-actions .ibtn svg{width:15px;height:15px}
  .vbar{padding:8px 8px;gap:6px;min-height:46px}
  /* Reader: tighter content padding so pages use the full width */
  #pages{padding:12px 8px 60px}
  .pg{margin-bottom:16px}
  .pg.dx{padding:20px 16px;font-size:14.5px}
  /* ===== Slightly smaller secondary buttons overall ===== */
  .btn.sm{padding:6px 10px;font-size:11.5px}
  /* ===== Dialog: use the full phone width ===== */
  dialog{width:min(560px,96vw);max-height:92vh}
  .dlg-body{max-height:58vh}
}
/* ===== Very narrow phones (Galaxy Fold, small Androids) ===== */
@media (max-width:400px){
  .brand{font-size:20px}
  .brand .brand-back{margin-right:2px}
  .top-nav{gap:4px}
  .top-nav .ibtn{width:38px;height:38px;min-width:38px;min-height:38px}
  .ai-model-select{max-width:110px;font-size:10.5px;padding:5px 6px}
  .hero-title{font-size:clamp(38px,15vw,54px)}
  .tool-card{padding:10px;gap:8px}
  .tool-card .tc-icon{width:30px;height:30px}
  .tool-card h3{font-size:12.5px}
  .tool-card p{display:none} /* hide the descriptions entirely on the narrowest screens */
}
.chat-nav{position:fixed;top:0;right:0;bottom:0;width:288px;z-index:8000;display:flex;flex-direction:column;background:var(--surface);border-left:1px solid var(--line);box-shadow:var(--shadow);max-width:85vw}
body.chat-overlay .chat-nav{position:absolute;top:50%;transform:translateY(-50%);margin-right:10px;right:10px;width:260px}
.chat-nav-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:14px 15px;border-bottom:1px solid var(--line)}
.chat-nav-title{font:700 12px var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.chat-nav-count{font:600 11px var(--mono);color:var(--dim)}
.chat-nav-list{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:9px;min-height:0}
.chat-nav-item{display:grid;grid-template-columns:10px 1fr auto;align-items:center;gap:9px;width:100%;text-align:left;border:1px solid var(--line);border-radius:10px;background:var(--panel2);padding:9px 11px;cursor:pointer;transition:border-color .14s,box-shadow .14s,transform .14s}
.chat-nav-item:hover{border-color:var(--line2);box-shadow:0 3px 14px -8px rgba(0,0,0,.4)}
.chat-nav-item:active{transform:scale(.98)}
.chat-nav-led{width:10px;height:10px;border-radius:50%;background:var(--line2);flex:none;box-shadow:0 0 0 1px var(--line)}
.chat-nav-item.user .chat-nav-led{background:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.chat-nav-snippet{font:13px/1.4 var(--sans);color:var(--ink);overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;word-break:break-word}
.chat-nav-role{font:600 10px var(--mono);color:var(--dim);flex:none}
.chat-nav-item.active{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.chat-nav-item .msg-flash{animation:railFlash .5s ease}
@keyframes railFlash{0%{background:var(--accent)}}60%{background:color-mix(in srgb,var(--accent) 32%,var(--panel2))}100%{background:none}}
.chat-nav-empty{padding:26px 18px;text-align:center;color:var(--dim);font:13px/1.5 var(--sans)}
.chat-nav-toggle{flex:none;border:1px solid var(--line);background:var(--panel2);width:30px;height:30px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted);transition:color .14s,border-color .14s}
.chat-nav-toggle:hover{color:var(--ink);border-color:var(--line2)}
.chat-nav-open .chat-wrap{display:none}body.chat-overlay .chat-wrap{display:flex}
@media(max-width:720px){.chat-nav{display:none}}
/* ===== Notebook save status chip ===== */
#nbSaveChip{
  display:none;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface-2);
  color:var(--soft);
  font:600 10.5px var(--mono);
  letter-spacing:.05em;
  cursor:pointer;
  transition:border-color .18s,color .18s,background .18s;
}
#nbSaveChip.on{display:inline-flex}
#nbSaveChip .nb-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--ok);
  flex:none;
}
#nbSaveChip.dirty{border-color:color-mix(in srgb,var(--warn) 55%,var(--line));color:var(--warn)}
#nbSaveChip.dirty .nb-dot{background:var(--warn);animation:nbPulse 1.2s ease-in-out infinite}
#nbSaveChip.saving{border-color:color-mix(in srgb,var(--accent) 55%,var(--line));color:var(--accent)}
#nbSaveChip.saving .nb-dot{background:var(--accent);animation:nbPulse .8s ease-in-out infinite}
#nbSaveChip.error{border-color:color-mix(in srgb,var(--err) 60%,var(--line));color:var(--err)}
#nbSaveChip.error .nb-dot{background:var(--err);animation:nbPulse .9s ease-in-out infinite}
#nbSaveChip:hover{border-color:var(--accent);color:var(--accent)}
@keyframes nbPulse{0%,100%{opacity:.35}50%{opacity:1}}
@media(max-width:720px){
  #nbSaveChip{padding:4px 8px;font-size:9.5px}
  #nbSaveChip .nb-text{display:none}
}
/* ============================================================
   LUMEN UI/UX PATCH — Phase 1 + Phase 2 core
   ============================================================ */

/* ---------- Mobile: 16px inputs to prevent iOS focus-zoom ---------- */
@media (max-width: 768px) {
  input:not([type=range]):not([type=checkbox]):not([type=radio]):not([type=color]):not([type=file]),
  textarea,
  select {
    font-size: 16px !important;
  }
}

/* ---------- Custom tooltip ---------- */
#lumenTip {
  position: fixed;
  z-index: 1100;
  max-width: 240px;
  padding: 6px 10px;
  background: var(--surface, #1b1b20);
  color: var(--fg, #f3f1ea);
  border: 1px solid var(--border-s, rgba(255,255,255,.12));
  border-radius: 8px;
  font: 500 12px/1.4 'Space Grotesk', system-ui, sans-serif;
  box-shadow: 0 6px 24px -8px rgba(0,0,0,.5), 0 2px 6px -2px rgba(0,0,0,.3);
  opacity: 0;
  transform: translateY(2px);
  transition: opacity 120ms ease, transform 120ms ease;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
#lumenTip.show { opacity: 1; transform: translateY(0); }
#lumenTip span { flex: 1; min-width: 0; }
#lumenTip kbd {
  flex: none;
  font: 600 10px var(--mono, monospace);
  padding: 2px 6px;
  border: 1px solid var(--border-s, rgba(255,255,255,.16));
  border-radius: 4px;
  background: var(--surface-2, #1b1b20);
  color: var(--muted, #8b8794);
}
@media (pointer: coarse) { #lumenTip { display: none; } }

/* ---------- Toast with inline action (undo) ---------- */
.toast button.toast-action {
  margin-left: 4px;
  padding: 3px 10px;
  border: 1px solid var(--accent, #ff5e3a);
  border-radius: 6px;
  background: transparent;
  color: var(--accent, #ff5e3a);
  font: 600 11px 'Space Grotesk', sans-serif;
  letter-spacing: .02em;
  cursor: pointer;
  transition: background 100ms;
}
.toast button.toast-action:hover {
  background: var(--accent, #ff5e3a);
  color: var(--accent-ink, #fff);
}

/* ---------- Command palette ---------- */
#cpRoot {
  position: fixed; inset: 0; z-index: 1400;
  display: flex; align-items: flex-start; justify-content: center;
  padding: min(15vh, 140px) 16px 16px;
  background: color-mix(in srgb, var(--bg, #0d0d10) 55%, transparent);
  backdrop-filter: blur(4px) saturate(.9);
  -webkit-backdrop-filter: blur(4px) saturate(.9);
  opacity: 0;
  transition: opacity 180ms cubic-bezier(.2,0,0,1);
}
#cpRoot.cp-show { opacity: 1; }
.cp-card {
  width: min(640px, 100%);
  background: var(--surface, #15151a);
  border: 1px solid var(--border-s, rgba(255,255,255,.12));
  border-radius: 14px;
  box-shadow: 0 24px 60px -20px rgba(0,0,0,.6), 0 8px 20px -8px rgba(0,0,0,.4);
  overflow: hidden;
  display: flex; flex-direction: column;
  max-height: min(70vh, 620px);
  transform: translateY(4px);
  transition: transform 180ms cubic-bezier(.2,0,0,1);
}
#cpRoot.cp-show .cp-card { transform: translateY(0); }
.cp-search {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border, #26262c);
}
.cp-search-icon { font-size: 16px; color: var(--muted, #8b8794); flex: none; }
.cp-search input {
  flex: 1; border: 0; background: transparent; box-shadow: none;
  outline: none; padding: 0; font-size: 16px; color: var(--fg, #f5f3ef);
}
.cp-list { flex: 1; min-height: 0; overflow-y: auto; padding: 6px; }
.cp-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 8px; cursor: pointer;
  transition: background 80ms ease;
}
.cp-item.active { background: var(--surface-3, #222228); }
.cp-label {
  flex: 1; min-width: 0;
  color: var(--fg, #f5f3ef);
  font: 500 14px 'Space Grotesk', sans-serif;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.cp-sub {
  font: 400 11px var(--mono, monospace);
  color: var(--muted, #8b8794); flex: none;
}
.cp-empty {
  padding: 24px 16px; text-align: center;
  color: var(--muted, #8b8794); font-size: 13px;
}
.cp-hint {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px;
  border-top: 1px solid var(--border, #26262c);
  background: var(--surface-2, #1b1b20);
  font: 500 11px var(--mono, monospace);
  color: var(--muted, #8b8794);
}
.cp-hint kbd {
  padding: 1px 5px;
  border: 1px solid var(--border-s, rgba(255,255,255,.16));
  border-radius: 4px;
  background: var(--surface, #15151a);
  font: 600 10px var(--mono, monospace);
  color: var(--fg, #f5f3ef);
}
[data-skin="paper"] #cpRoot,
[data-skin="comfy"] #cpRoot,
[data-skin="contrast"] #cpRoot {
  backdrop-filter: none; -webkit-backdrop-filter: none;
  background: rgba(35,28,15,.4);
}
[data-skin="paper"] #lumenTip,
[data-skin="comfy"] #lumenTip,
[data-skin="contrast"] #lumenTip {
  box-shadow: 0 6px 24px -8px rgba(35,28,15,.32), 0 2px 6px -2px rgba(35,28,15,.2);
}

/* ---------- Shortcut help overlay ---------- */
#scHelp {
  position: fixed; inset: 0; z-index: 1400;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  background: color-mix(in srgb, var(--bg, #0d0d10) 60%, transparent);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 180ms cubic-bezier(.2,0,0,1);
}
#scHelp.sc-show { opacity: 1; }
.sc-card {
  position: relative;
  width: min(560px, 100%);
  max-height: 80vh; overflow-y: auto;
  background: var(--surface, #15151a);
  border: 1px solid var(--border-s, rgba(255,255,255,.12));
  border-radius: 14px;
  box-shadow: 0 24px 60px -20px rgba(0,0,0,.6);
  padding: 22px 24px;
  transform: translateY(6px);
  transition: transform 180ms cubic-bezier(.2,0,0,1);
}
#scHelp.sc-show .sc-card { transform: translateY(0); }
.sc-card h3 {
  font: italic 600 20px var(--serif, Georgia, serif);
  margin-bottom: 14px;
  color: var(--ink, var(--fg));
}
.sc-sec { margin-bottom: 16px; }
.sc-sec h4 {
  font: 600 10px var(--mono, monospace);
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted, #8b8794);
  margin-bottom: 8px;
}
.sc-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 0;
  font: 400 13px 'Space Grotesk', sans-serif;
  color: var(--fg, #f5f3ef);
  border-bottom: 1px solid var(--border, #26262c);
}
.sc-row:last-child { border-bottom: 0; }
.sc-row kbd {
  font: 600 10px var(--mono, monospace);
  padding: 2px 6px;
  border: 1px solid var(--border-s, rgba(255,255,255,.16));
  border-radius: 4px;
  background: var(--surface-2, #1b1b20);
  color: var(--fg, #f5f3ef);
  margin-left: 4px;
}
.sc-close {
  position: absolute; top: 16px; right: 16px;
  width: 32px; height: 32px;
  border: 1px solid var(--border, #26262c);
  border-radius: 8px;
  background: transparent;
  color: var(--muted, #8b8794);
  cursor: pointer; font-size: 16px; line-height: 1;
}
.sc-close:hover {
  color: var(--fg, #f5f3ef);
  border-color: var(--border-strong, #3a3a42);
}

/* ---------- Reduced motion clamp ---------- */
@media (prefers-reduced-motion: reduce) {
  #cpRoot, .cp-card, #scHelp, .sc-card, #lumenTip {
    transition-duration: 1ms !important;
    transform: none !important;
  }
}

/* ===== PDF Signer ===== */
.sg-toolbar{display:flex;align-items:center;gap:12px;padding:10px 16px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.sg-toolbar .pgnav{display:flex;align-items:center;gap:8px}
.sg-toolbar .pgnav .mono{font:600 12px var(--mono);color:var(--soft);min-width:52px;text-align:center}
.sg-stage{position:relative;display:flex;justify-content:center;padding:18px;background:color-mix(in srgb,var(--surface-2) 55%,transparent);border-top:1px solid var(--line);overflow:auto;max-height:70vh}
.sg-stage canvas{display:block;background:#fff;box-shadow:0 4px 24px -6px rgba(0,0,0,.35);max-width:100%;height:auto}
.sg-overlay{position:absolute;inset:18px;pointer-events:none}
.sg-sig{position:absolute;pointer-events:auto;cursor:move;outline:1.5px dashed transparent;transition:outline-color .12s;user-select:none}
.sg-sig:hover{outline-color:var(--accent)}
.sg-sig.on{outline-color:var(--accent);outline-style:solid}
.sg-sig img,.sg-sig canvas{display:block;width:100%;height:100%;pointer-events:none}
.sg-handle{position:absolute;width:12px;height:12px;background:var(--accent);border:2px solid #fff;border-radius:3px;box-shadow:0 1px 4px rgba(0,0,0,.35);pointer-events:auto;z-index:2}
.sg-handle[data-h="nw"]{left:-6px;top:-6px;cursor:nwse-resize}
.sg-handle[data-h="ne"]{right:-6px;top:-6px;cursor:nesw-resize}
.sg-handle[data-h="sw"]{left:-6px;bottom:-6px;cursor:nesw-resize}
.sg-handle[data-h="se"]{right:-6px;bottom:-6px;cursor:nwse-resize}
.sg-handle[data-h="del"]{right:-10px;top:-10px;background:var(--err);color:#fff;font:700 10px/1 var(--sans);cursor:pointer;width:18px;height:18px;border-radius:50%;display:grid;place-items:center}

/* ===== To-Do ===== */
.td-wrap{max-width:760px;margin:0 auto;padding:22px 20px 60px}
.td-add{display:flex;gap:8px;margin-bottom:18px}
.td-add input[type="text"]{flex:1;font-size:15px}
.td-add select{width:auto;flex:none}
.td-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}
.td-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:var(--panel);transition:border-color .12s,background .12s}
.td-item:hover{border-color:var(--line2)}
.td-item input[type="checkbox"]{width:17px;height:17px;flex:none;accent-color:var(--accent);cursor:pointer}
.td-item .td-txt{flex:1;min-width:0;word-break:break-word;font:400 14.5px var(--sans);line-height:1.45}
.td-item.done .td-txt{opacity:.5;text-decoration:line-through}
.td-item .td-pri{width:7px;height:7px;border-radius:50%;flex:none;background:var(--dim)}
.td-item .td-pri[data-v="1"]{background:var(--warn)}
.td-item .td-pri[data-v="2"]{background:var(--err)}
.td-item .td-del{margin-left:auto;background:none;border:none;color:var(--dim);cursor:pointer;font-size:18px;line-height:1;padding:2px 6px;border-radius:6px;opacity:0;transition:opacity .12s,color .12s}
.td-item:hover .td-del{opacity:1}
.td-item .td-del:hover{color:var(--err);background:color-mix(in srgb,var(--err) 12%,transparent)}
.td-empty{text-align:center;padding:34px 12px;color:var(--soft)}
.td-empty[hidden]{display:none!important}

/* ===== Document Generator ===== */
/* Standalone feature (was a Marginalia tab). Fills the view the way the study
   tabs do, so it keeps the full editor height instead of being boxed inside a
   scrolling page body. */
.docgen-body{flex:1;display:flex;min-height:0;padding:0;overflow:hidden}
.dg-gen-split{flex:1;display:grid;grid-template-columns:260px 1fr;min-height:0;overflow:hidden}
.dg-gen-side{width:260px;flex:none;border-right:1px solid var(--line);background:var(--surface);padding:16px 14px;overflow:auto;min-height:0}
.dg-gen-side .lbl{display:block;margin:0 0 8px}
.dg-gen-mode-sel{display:block;width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:9px;background:var(--surface-2);color:var(--fg);font:500 13px var(--sans);margin-bottom:10px;outline:none;cursor:pointer}
.dg-gen-mode-sel:focus{border-color:var(--accent)}
.dg-gen-main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg);min-height:0}
.dg-gen-hero{padding:16px 22px 12px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 5%,transparent),transparent);flex:none}
.dg-gen-hero-top{display:flex;align-items:center;gap:12px}
.dg-gen-title{flex:1;min-width:0;border:none;background:transparent;padding:0;font:italic 600 22px var(--serif);color:var(--ink);outline:none;box-shadow:none}
.dg-gen-title:focus{box-shadow:none}
.dg-gen-title::placeholder{color:var(--dim);font-style:italic;opacity:.7}
.dg-gen-mode-badge{font:600 10px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);border:1px solid color-mix(in srgb,var(--accent) 32%,transparent);border-radius:999px;padding:4px 11px;flex:none}
.dg-gen-msgs{flex:1;overflow:auto;padding:18px 22px;min-height:0}
.dg-gen-empty{text-align:center;max-width:440px;margin:6vh auto 0;padding:0 20px}
.dg-gen-empty h3{font:italic 600 22px var(--serif);margin:8px 0 6px;color:var(--ink)}
.dg-gen-empty p{color:var(--soft);font-size:14px;line-height:1.6;margin:0}
.dg-doc{max-width:780px;margin:0 auto;font-family:var(--read);font-size:15px;line-height:1.75;color:var(--fg);background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:26px 32px;box-shadow:var(--shadow-sm);white-space:pre-wrap;word-break:break-word}
.dg-doc h1,.dg-doc h2,.dg-doc h3{font-family:var(--serif);margin:.9em 0 .4em;line-height:1.2}
.dg-doc p{margin:0 0 .8em}
.dg-doc ul,.dg-doc ol{padding-left:1.4em;margin:.4em 0 .9em}
.dg-doc blockquote{border-left:3px solid var(--accent);padding-left:12px;color:var(--soft);font-style:italic;margin:.6em 0}
.dg-doc code{font:13px var(--mono);background:var(--surface-2);padding:1px 5px;border-radius:4px}
.dg-msg.user{max-width:70%;margin:0 0 18px auto;padding:11px 15px;background:color-mix(in srgb,var(--accent) 14%,var(--surface-2));border:1px solid color-mix(in srgb,var(--accent) 26%,var(--line));border-radius:12px;border-top-right-radius:5px;font:400 14px var(--sans);color:var(--fg);white-space:pre-wrap}
.dg-msg.ai{margin:0 0 22px;max-width:100%}
.dg-msg.ai .bubble{background:var(--panel);border:1px solid var(--line);border-radius:12px;border-top-left-radius:5px;padding:2px 6px 2px 16px;border-left:2px solid var(--accent)}
.dg-msg.ai .bubble .dg-doc{border:none;background:none;box-shadow:none;padding:16px 0 16px 6px;margin:0}
.dg-msg.typing .bubble::after{content:'';display:inline-block;width:13px;height:13px;border:2px solid color-mix(in srgb,var(--accent) 28%,transparent);border-top-color:var(--accent);border-radius:50%;animation:rspin .7s linear infinite;vertical-align:-2px;margin-left:6px}
.dg-gen-form{padding:14px 22px 16px;border-top:1px solid var(--line);background:color-mix(in srgb,var(--surface) 82%,transparent);flex:none;max-height:44vh;overflow:auto}
.dg-gen-form-actions{display:flex;align-items:center;gap:12px;margin-top:12px}
.dg-form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px}
.dg-form-grid label{display:flex;flex-direction:column;gap:5px;min-width:0}
.dg-form-grid label>span{font:600 10px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--soft)}
.dg-form-grid input,.dg-form-grid textarea,.dg-form-grid select{width:100%;font-size:13.5px}
.dg-form-grid .span-2{grid-column:span 2}
.dg-gen-composer{padding:12px 22px 14px;border-top:1px solid var(--line);background:color-mix(in srgb,var(--surface) 92%,transparent);flex:none}
.dg-gen-composer textarea{width:100%;font-size:14px;min-height:52px;max-height:180px;resize:vertical}
.dg-gen-composer-actions{display:flex;align-items:center;gap:8px;margin-top:8px}
.dg-gen-exports{display:flex;align-items:center;gap:8px;margin-top:10px;padding-top:10px;border-top:1px dashed var(--line)}
.dg-gen-exports .lbl{flex:none;margin:0}
@media (max-width:820px){
  .dg-gen-split{grid-template-columns:1fr;grid-template-rows:auto 1fr}
  .dg-gen-side{width:100%;border-right:none;border-bottom:1px solid var(--line);max-height:38vh;padding:12px}
  .dg-gen-mode-sel{width:100%}
  .dg-form-grid{grid-template-columns:1fr}
  .dg-form-grid .span-2{grid-column:auto}
}
/* ===== Font download / text-pdf quality additions ===== */
.md h5,.md h6{margin:1em 0 .35em;line-height:1.3}
.md h5{font-size:1em;font-weight:600;color:var(--fg)}
.md h6{font-size:.92em;font-weight:600;opacity:.85;color:var(--soft)}
.tp-math,.md .tp-math{font-family:"STIX Two Math","Cambria Math","Latin Modern Math","Noto Sans Math","Segoe UI Symbol",serif;font-variant-numeric:tabular-nums}
.tp-pane-foot{display:flex;align-items:center;gap:8px;margin-top:8px;padding-top:8px;border-top:1px dashed var(--border);font:600 11px var(--mono);letter-spacing:.04em;color:var(--soft)}
.tp-pane-foot .spacer{flex:1}
.tp-pane-foot .btn.sm{padding:4px 10px;font-size:11px}
.tp-pane-foot .tp-page-est{color:var(--accent)}