/* =============================================================
   Compass — design system
   Palette : royal navy ink + parchment white + signal gold
   Type    : serif display (scholarly) / system sans (body) / mono (syllabus codes = data)
   Signature: "the learning spine" — the mastery rail that repeats at every level
   ============================================================= */

:root{
  /* Core palette */
  --ink:#0B1B3A;          /* royal navy, darkest */
  --navy:#12306E;         /* royal navy */
  --navy-600:#1B47A6;
  --navy-300:#5C82D6;
  --gold:#F2B138;         /* signal accent */
  --gold-soft:#FFF0CE;
  --paper:#F6F8FC;
  --white:#FFFFFF;

  /* Learning states (never colour-only — always paired with a label or icon) */
  --state-new:#6C7A96;
  --state-learning:#2C7DD6;
  --state-practise:#E08A1E;
  --state-gap:#D6503C;
  --state-strong:#128A6A;

  /* Semantic surfaces */
  --bg:var(--paper);
  --surface:var(--white);
  --surface-2:#EEF2FA;
  --glass:rgba(255,255,255,.72);
  --glass-brd:rgba(11,27,58,.10);
  --text:#0D1B33;
  --text-2:#4A5876;
  --text-3:#6E7C97;
  --line:#DFE6F3;
  --focus:#1B47A6;

  /* Type */
  --display:ui-serif,"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;

  /* Scale */
  --fs:16px;
  --r-sm:8px; --r:14px; --r-lg:22px; --r-xl:28px;
  --sp:8px;
  --shadow-1:0 1px 2px rgba(11,27,58,.06),0 2px 8px rgba(11,27,58,.06);
  --shadow-2:0 12px 36px rgba(11,27,58,.12);
  --dur:.28s;
}

[data-theme="dark"]{
  --bg:#070F22;
  --surface:#0E1B36;
  --surface-2:#152444;
  --glass:rgba(20,36,68,.66);
  --glass-brd:rgba(255,255,255,.10);
  --text:#EAF0FF;
  --text-2:#A9B7D6;
  --text-3:#8494B7;
  --line:#22345C;
  --navy:#284d9e;
  --navy-300:#8FADEE;
  --focus:#8FADEE;
  --state-strong:#2CC79C;
  --state-learning:#6BB0F5;
  --state-practise:#F2B138;
  --state-gap:#FF7B66;
  --shadow-1:0 1px 2px rgba(0,0,0,.4);
  --shadow-2:0 14px 40px rgba(0,0,0,.5);
}

[data-contrast="high"]{
  --text:#000; --text-2:#161616; --text-3:#262626;
  --line:#000; --surface:#fff; --bg:#fff; --surface-2:#fff; --glass:#fff;
  --glass-brd:#000;
}
[data-theme="dark"][data-contrast="high"]{
  --text:#fff; --text-2:#f0f0f0; --text-3:#e2e2e2;
  --line:#fff; --surface:#000; --bg:#000; --surface-2:#0a0a0a; --glass:#000;
}
[data-contrast="high"] .card,[data-contrast="high"] .panel{border-width:2px}

*,*::before,*::after{box-sizing:border-box}
html{font-size:var(--fs)}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);line-height:1.55;-webkit-font-smoothing:antialiased;
  padding-bottom:env(safe-area-inset-bottom);
}
h1,h2,h3,h4{font-family:var(--display);font-weight:600;line-height:1.18;margin:0 0 .4em;letter-spacing:-.01em}
h1{font-size:clamp(1.7rem,1.2rem + 2.2vw,2.6rem)}
h2{font-size:clamp(1.3rem,1.05rem + 1.1vw,1.75rem)}
h3{font-size:1.12rem}
h4{font-size:1rem;font-family:var(--sans);font-weight:700}
p{margin:0 0 .8em}
a{color:var(--navy-600);text-underline-offset:3px}
[data-theme="dark"] a{color:var(--navy-300)}
small{font-size:.82rem}
code,.mono{font-family:var(--mono)}
button{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:fixed;left:50%;translate:-50% -120%;top:8px;z-index:200;background:var(--ink);color:#fff;padding:10px 16px;border-radius:99px;transition:translate .2s}
.skip-link:focus{translate:-50% 0}

/* ---------- Top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:60;display:flex;align-items:center;gap:12px;
  padding:10px 16px;padding-top:calc(10px + env(safe-area-inset-top));
  background:var(--glass);border-bottom:1px solid var(--glass-brd);
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit;margin-right:auto}
.brand-mark{width:32px;height:32px;flex:none}
.brand-mark rect{fill:var(--ink)}
[data-theme="dark"] .brand-mark rect{fill:var(--navy-600)}
.brand-needle{fill:var(--gold)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-family:var(--display);font-size:1.12rem;letter-spacing:.01em}
.brand-text span{font-size:.68rem;color:var(--text-3);letter-spacing:.09em;text-transform:uppercase}
.topbar-right{display:flex;align-items:center;gap:8px}
.icon-btn{
  display:grid;place-items:center;width:40px;height:40px;border-radius:12px;border:1px solid transparent;
  background:transparent;cursor:pointer;transition:background var(--dur),border-color var(--dur);
}
.icon-btn:hover{background:var(--surface-2)}
.icon-btn svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.streak-chip{display:flex;align-items:center;gap:5px;padding:6px 11px;border-radius:99px;background:var(--gold-soft);color:#7A5406;font-weight:700;font-size:.88rem}
[data-theme="dark"] .streak-chip{background:rgba(242,177,56,.16);color:var(--gold)}
.streak-chip svg{width:16px;height:16px;fill:currentColor;stroke:none}

/* ---------- Layout ---------- */
.shell{display:flex;max-width:1400px;margin:0 auto;min-height:calc(100vh - 61px)}
.sidenav{
  position:fixed;inset:0 auto 0 0;width:250px;z-index:70;transform:translateX(-102%);
  background:var(--surface);border-right:1px solid var(--line);
  padding:16px 12px;display:flex;flex-direction:column;gap:6px;overflow:auto;transition:transform var(--dur);
}
.sidenav.open{transform:none}
.nav-scrim{position:fixed;inset:0;background:rgba(11,27,58,.45);z-index:65;border:0}
.nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.nav-item{
  display:flex;align-items:center;gap:11px;width:100%;padding:11px 12px;border-radius:12px;
  text-decoration:none;color:var(--text-2);font-weight:600;font-size:.94rem;border:0;background:none;cursor:pointer;text-align:left;
}
.nav-item svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
.nav-item:hover{background:var(--surface-2);color:var(--text)}
.nav-item[aria-current="page"]{background:var(--ink);color:#fff}
[data-theme="dark"] .nav-item[aria-current="page"]{background:var(--navy-600)}
.nav-item[aria-current="page"] svg{stroke:var(--gold)}
.nav-foot{margin-top:auto;padding:14px 10px 0;border-top:1px solid var(--line);display:flex;flex-direction:column;align-items:flex-start;gap:8px}
.nav-note{font-size:.76rem;color:var(--text-3);margin:0}
.link-btn{background:none;border:0;padding:2px 0;color:var(--navy-600);font-weight:600;font-size:.85rem;cursor:pointer;text-decoration:underline;text-underline-offset:3px}
[data-theme="dark"] .link-btn{color:var(--navy-300)}
.link-btn.danger{color:var(--state-gap)}
.view{flex:1;min-width:0;padding:22px 16px 96px;animation:fade var(--dur) ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

@media(min-width:900px){
  .nav-toggle{display:none}
  .sidenav{position:sticky;top:61px;height:calc(100vh - 61px);transform:none;border-radius:0}
  .nav-scrim{display:none}
  .view{padding:30px 34px 60px}
}

/* ---------- Mobile tab bar ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;justify-content:space-around;
  background:var(--glass);border-top:1px solid var(--glass-brd);padding:6px 4px calc(6px + env(safe-area-inset-bottom));
}
@media(min-width:900px){.tabbar{display:none}}
.tab{display:flex;flex-direction:column;align-items:center;gap:3px;flex:1;padding:6px 2px;border:0;background:none;color:var(--text-3);font-size:.66rem;font-weight:700;letter-spacing:.02em;cursor:pointer;border-radius:10px;text-decoration:none}
.tab svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tab[aria-current="page"]{color:var(--navy-600)}
[data-theme="dark"] .tab[aria-current="page"]{color:var(--gold)}

/* ---------- Building blocks ---------- */
.stack{display:flex;flex-direction:column;gap:18px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.spread{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow-1)}
.card.tight{padding:15px;border-radius:var(--r)}
.panel{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r);padding:15px}
.eyebrow{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text-3);font-weight:700;margin:0 0 6px;font-family:var(--sans)}
.muted{color:var(--text-2)}
.tiny{font-size:.8rem}
.center{text-align:center}
hr.rule{border:0;border-top:1px solid var(--line);margin:18px 0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:99px;
  border:1px solid transparent;background:var(--ink);color:#fff;font-weight:700;font-size:.92rem;cursor:pointer;
  transition:transform var(--dur),background var(--dur),box-shadow var(--dur);text-decoration:none;
}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn:active{transform:none}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
[data-theme="dark"] .btn{background:var(--navy-600)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn.ghost:hover{background:var(--surface-2)}
.btn.gold{background:var(--gold);color:#3B2A00}
.btn.sm{padding:8px 14px;font-size:.85rem}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:99px;background:var(--surface-2);border:1px solid var(--line);font-size:.78rem;font-weight:600;color:var(--text-2)}
.chip.mono{font-family:var(--mono);letter-spacing:-.02em}
.chip.gold{background:var(--gold-soft);border-color:transparent;color:#7A5406}
[data-theme="dark"] .chip.gold{background:rgba(242,177,56,.16);color:var(--gold)}
.chip .dot{width:8px;height:8px;border-radius:99px;background:currentColor;flex:none}

.badge-state{display:inline-flex;align-items:center;gap:6px;font-size:.76rem;font-weight:700;padding:3px 9px;border-radius:8px;border:1px solid currentColor}
.s-new{color:var(--state-new)} .s-learning{color:var(--state-learning)}
.s-practise{color:var(--state-practise)} .s-gap{color:var(--state-gap)} .s-strong{color:var(--state-strong)}

/* Progress bar / ring */
.bar{height:9px;border-radius:99px;background:var(--surface-2);overflow:hidden;border:1px solid var(--line)}
.bar > i{display:block;height:100%;background:linear-gradient(90deg,var(--navy),var(--navy-600));border-radius:99px;transition:width .6s cubic-bezier(.2,.8,.2,1)}
.bar.gold > i{background:linear-gradient(90deg,#E09A1B,var(--gold))}
.ring{display:block}
.ring circle{fill:none;stroke-linecap:round}
.ring .track{stroke:var(--surface-2)}
.ring .fill{stroke:var(--navy-600);transition:stroke-dashoffset .8s cubic-bezier(.2,.8,.2,1)}

/* ---------- Signature: the learning spine ---------- */
.spine{position:relative;display:flex;gap:0;margin:6px 0 2px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin}
.spine-step{position:relative;flex:1;min-width:104px;padding:12px 10px 10px;text-align:center}
.spine-step::before{content:"";position:absolute;top:20px;left:0;right:0;height:3px;background:var(--line)}
.spine-step:first-child::before{left:50%}
.spine-step:last-child::before{right:50%}
.spine-step .node{position:relative;width:19px;height:19px;margin:11px auto 9px;border-radius:99px;background:var(--surface);border:3px solid var(--line);z-index:1;transition:all var(--dur)}
.spine-step .lbl{font-size:.72rem;font-weight:700;color:var(--text-3);letter-spacing:.03em}
.spine-step .sub{font-size:.66rem;color:var(--text-3);display:block;margin-top:2px}
.spine-step.done::before{background:var(--navy-600)}
.spine-step.done .node{background:var(--navy-600);border-color:var(--navy-600)}
.spine-step.done .lbl{color:var(--text)}
.spine-step.current .node{border-color:var(--gold);background:var(--gold);box-shadow:0 0 0 6px rgba(242,177,56,.25)}
.spine-step.current .lbl{color:var(--text)}
.spine-step.current .node::after{content:"";position:absolute;inset:-6px;border-radius:99px;border:2px solid var(--gold);animation:pulse 2.4s ease-out infinite}
@keyframes pulse{0%{transform:scale(.8);opacity:.9}100%{transform:scale(1.9);opacity:0}}
.spine-step.locked .lbl::after{content:" ·  locked";font-weight:600;color:var(--text-3)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;border-radius:var(--r-xl);padding:26px 24px;
  background:linear-gradient(135deg,var(--ink) 0%,var(--navy) 62%,#1E3F8C 100%);color:#fff;
}
.hero h1{color:#fff;margin-bottom:6px}
.hero p{color:#C9D6F2;max-width:56ch}
.hero .glass{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);border-radius:var(--r);padding:14px;backdrop-filter:blur(8px)}
.hero-figure{position:absolute;right:-40px;top:-30px;width:280px;opacity:.5;pointer-events:none}

/* ---------- Subject cards ---------- */
.subject-card{display:block;text-decoration:none;color:inherit;position:relative;overflow:hidden}
.subject-card .accent{position:absolute;left:0;top:0;bottom:0;width:5px}
.subject-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.subject-card{transition:transform var(--dur),box-shadow var(--dur)}

/* ---------- Accordion (FAQ / teacher tips) ---------- */
.acc{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface)}
.acc + .acc{margin-top:8px}
.acc-head{width:100%;display:flex;gap:12px;align-items:flex-start;padding:14px 16px;background:none;border:0;cursor:pointer;text-align:left;font-weight:650;font-size:.95rem}
.acc-head:hover{background:var(--surface-2)}
.acc-head .caret{margin-left:auto;flex:none;transition:transform var(--dur);color:var(--text-3)}
.acc[open] .caret,.acc.open .caret{transform:rotate(90deg)}
.acc-body{padding:0 16px 16px;border-top:1px solid var(--line);padding-top:14px}
.acc-body p:last-child{margin-bottom:0}

/* Teacher tip */
.teacher-tip{border-left:4px solid var(--gold);background:var(--gold-soft);border-radius:0 var(--r) var(--r) 0;padding:14px 16px}
[data-theme="dark"] .teacher-tip{background:rgba(242,177,56,.10)}
.teacher-tip .eyebrow{color:#7A5406}
[data-theme="dark"] .teacher-tip .eyebrow{color:var(--gold)}

/* ---------- Quiz ---------- */
.option{
  display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;padding:14px 16px;border-radius:var(--r);
  border:1.5px solid var(--line);background:var(--surface);cursor:pointer;font-size:.94rem;transition:all var(--dur);margin-bottom:9px;
}
.option:hover:not(:disabled){border-color:var(--navy-300);background:var(--surface-2)}
.option .key{flex:none;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;background:var(--surface-2);font-weight:800;font-size:.8rem;border:1px solid var(--line)}
.option.correct{border-color:var(--state-strong);background:color-mix(in srgb,var(--state-strong) 10%,transparent)}
.option.correct .key{background:var(--state-strong);color:#fff;border-color:transparent}
.option.wrong{border-color:var(--state-gap);background:color-mix(in srgb,var(--state-gap) 10%,transparent)}
.option.wrong .key{background:var(--state-gap);color:#fff;border-color:transparent}
.option:disabled{cursor:default;opacity:1}
.feedback{border-radius:var(--r);padding:15px;margin-top:12px;border:1px solid var(--line);background:var(--surface-2);animation:fade .3s ease}
.feedback.good{border-left:4px solid var(--state-strong)}
.feedback.bad{border-left:4px solid var(--state-gap)}
textarea.answer{width:100%;min-height:120px;padding:13px;border-radius:var(--r);border:1.5px solid var(--line);background:var(--surface);color:var(--text);font:inherit;resize:vertical}
input.text-in{padding:11px 13px;border-radius:12px;border:1.5px solid var(--line);background:var(--surface);color:var(--text);font:inherit;max-width:220px}

/* Confidence scale */
.conf{display:flex;gap:8px;flex-wrap:wrap}
.conf button{flex:1;min-width:64px;padding:10px 6px;border-radius:12px;border:1.5px solid var(--line);background:var(--surface);cursor:pointer;font-size:.76rem;font-weight:600;color:var(--text-2)}
.conf button[aria-pressed="true"]{border-color:var(--navy-600);background:var(--navy-600);color:#fff}
.conf button strong{display:block;font-size:1rem}

/* ---------- Marking ladder ---------- */
.ladder{display:grid;gap:10px}
.ladder-item{border:1px solid var(--line);border-radius:var(--r);padding:14px;background:var(--surface)}
.ladder-item .tag{font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.l-dev .tag{color:var(--state-gap)} .l-sound .tag{color:var(--state-practise)}
.l-strong .tag{color:var(--state-learning)} .l-adv .tag{color:var(--state-strong)}
.l-dev{border-left:4px solid var(--state-gap)} .l-sound{border-left:4px solid var(--state-practise)}
.l-strong{border-left:4px solid var(--state-learning)} .l-adv{border-left:4px solid var(--state-strong)}

/* ---------- Concept map / visuals ---------- */
.mapwrap{position:relative;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--surface);touch-action:none}
.mapwrap svg{display:block;width:100%;height:min(62vh,520px);cursor:grab;background:
  radial-gradient(circle at 1px 1px,var(--line) 1px,transparent 0) 0 0/22px 22px}
.mapwrap svg.drag{cursor:grabbing}
.map-controls{position:absolute;right:10px;top:10px;display:flex;flex-direction:column;gap:6px;z-index:2}
.map-controls button{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(6px);cursor:pointer;font-weight:800;line-height:1;font-size:1rem}
.map-legend{position:absolute;left:10px;bottom:10px;display:flex;gap:8px;flex-wrap:wrap;max-width:78%;z-index:2}
.map-legend span{font-size:.68rem;background:var(--glass);border:1px solid var(--line);padding:3px 8px;border-radius:99px;backdrop-filter:blur(6px);display:inline-flex;gap:5px;align-items:center}
.map-legend i{width:9px;height:9px;border-radius:3px;display:inline-block}
.node-lbl{font-family:var(--sans);font-size:11px;font-weight:600;pointer-events:none}
.node-rect{cursor:pointer;transition:filter .2s}
.node-rect:hover{filter:brightness(1.12)}
.edge{stroke:var(--line);stroke-width:1.6;fill:none}
.edge.hot{stroke:var(--gold);stroke-width:2.6}

/* Memory map */
.mem-group{border-radius:var(--r);padding:14px;border:1px solid var(--line);background:var(--surface)}
.mem-item{border-radius:12px;border:1px dashed var(--line);padding:11px 13px;margin-top:8px;cursor:pointer;background:var(--surface-2)}
.mem-item[data-open="true"]{border-style:solid}
.mem-item .trigger{font-family:var(--display);font-size:1.02rem;color:var(--navy-600)}
[data-theme="dark"] .mem-item .trigger{color:var(--gold)}

/* Flashcard */
.flash{perspective:1200px;height:230px;margin:10px 0}
.flash-inner{position:relative;width:100%;height:100%;transition:transform .55s cubic-bezier(.2,.8,.2,1);transform-style:preserve-3d}
.flash.flipped .flash-inner{transform:rotateY(180deg)}
.flash-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--r-lg);border:1px solid var(--line);padding:22px;display:grid;place-content:center;text-align:center;background:var(--surface);box-shadow:var(--shadow-1)}
.flash-face.back{transform:rotateY(180deg);background:var(--ink);color:#fff;border-color:transparent}

/* Vocabulary */
.vocab-card{display:flex;gap:13px;align-items:flex-start;padding:14px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.vocab-ico{width:42px;height:42px;flex:none;border-radius:12px;display:grid;place-items:center;background:var(--surface-2)}
.vocab-ico svg{width:24px;height:24px;fill:none;stroke:var(--navy-600);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
[data-theme="dark"] .vocab-ico svg{stroke:var(--gold)}

/* Drag & drop / sorting */
.drag-item{padding:10px 14px;border-radius:12px;border:1.5px solid var(--line);background:var(--surface);cursor:grab;font-size:.88rem;font-weight:600;margin:0 6px 6px 0;display:inline-block}
.drag-item.picked{border-color:var(--gold);background:var(--gold-soft);color:#7A5406}
.drag-item.ok{border-color:var(--state-strong);background:color-mix(in srgb,var(--state-strong) 12%,transparent)}
.drag-item.bad{border-color:var(--state-gap);background:color-mix(in srgb,var(--state-gap) 12%,transparent)}
.dropzone{min-height:74px;border:2px dashed var(--line);border-radius:var(--r);padding:11px;background:var(--surface-2);transition:border-color var(--dur)}
.dropzone.over{border-color:var(--navy-600)}
.dropzone.ok{border-color:var(--state-strong);border-style:solid}
.dropzone.bad{border-color:var(--state-gap);border-style:solid}

/* Question breakdown highlighter */
.token{display:inline-block;padding:2px 4px;border-radius:6px;cursor:pointer;border:1px solid transparent}
.token:hover{background:var(--surface-2)}
.token.t-command{background:var(--gold-soft);border-color:#E0A62F;color:#6B4A05;font-weight:700}
.token.t-topic{background:color-mix(in srgb,var(--state-learning) 18%,transparent);border-color:var(--state-learning);font-weight:700}
.token.t-key{background:color-mix(in srgb,var(--state-strong) 18%,transparent);border-color:var(--state-strong);font-weight:700}

/* Timer */
.timer{font-family:var(--mono);font-size:1.6rem;font-weight:700;letter-spacing:-.02em}
.timer.warn{color:var(--state-gap)}

/* Toast */
.toast-stack{position:fixed;left:50%;translate:-50% 0;bottom:84px;z-index:120;display:flex;flex-direction:column;gap:8px;width:min(420px,92vw)}
@media(min-width:900px){.toast-stack{bottom:24px}}
.toast{background:var(--ink);color:#fff;border-radius:14px;padding:13px 16px;box-shadow:var(--shadow-2);animation:pop .3s cubic-bezier(.2,.9,.3,1.3);display:flex;gap:10px;align-items:flex-start;font-size:.9rem}
.toast .ico{flex:none;font-size:1.05rem}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.96)}to{opacity:1;transform:none}}

/* Modal */
.modal-root{position:fixed;inset:0;z-index:130;display:grid;place-items:center;padding:16px;background:rgba(11,27,58,.5);backdrop-filter:blur(3px)}
.modal-root[hidden]{display:none}
.modal{background:var(--surface);border-radius:var(--r-xl);padding:24px;width:min(560px,100%);max-height:88vh;overflow:auto;box-shadow:var(--shadow-2)}

/* Achievements */
.ach{display:flex;gap:12px;align-items:center;padding:13px;border-radius:var(--r);border:1px solid var(--line);background:var(--surface)}
.ach.locked{opacity:.55}
.ach-medal{width:44px;height:44px;flex:none;border-radius:12px;display:grid;place-items:center;background:var(--surface-2);font-family:var(--display);font-weight:700;color:var(--text-3)}
.ach:not(.locked) .ach-medal{background:linear-gradient(135deg,var(--gold),#E08A1E);color:#3B2A00}

/* Tables */
table.data{width:100%;border-collapse:collapse;font-size:.9rem}
table.data th,table.data td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
table.data th{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-3)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* Simulation */
.sim-stat{padding:12px;border-radius:var(--r);background:var(--surface-2);border:1px solid var(--line);text-align:center}
.sim-stat b{display:block;font-family:var(--mono);font-size:1.25rem}
.delta-up{color:var(--state-strong);font-weight:700}
.delta-down{color:var(--state-gap);font-weight:700}

/* Empty state */
.empty{text-align:center;padding:36px 18px;border:2px dashed var(--line);border-radius:var(--r-lg);color:var(--text-2)}

/* Print (parent summary) */
@media print{
  .topbar,.sidenav,.tabbar,.toast-stack{display:none!important}
  .view{padding:0}
  .card{break-inside:avoid;box-shadow:none}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}
[data-motion="reduced"] *{animation:none!important;transition:none!important}