/* ============================================================
   Statute 2-15 — stylesheet
   Apple-style system look: SF type, neutral surfaces, graphite
   accent (no blue), system green / red / orange for state.
   Light and dark follow the device, with a manual override.
   ============================================================ */

:root{
  --bg:#F5F5F7;
  --surface:#FFFFFF;
  --surface-2:#F2F2F4;
  --fill:rgba(120,120,128,.12);
  --fill-2:rgba(120,120,128,.08);
  --text:#1D1D1F;
  --muted:#6E6E73;
  --faint:#AEAEB2;
  --rule:rgba(0,0,0,.08);
  --accent:#1D1D1F;
  --accent-hover:#3A3A3C;
  --on-accent:#FFFFFF;
  --green:#248A3D;
  --green-bg:rgba(52,199,89,.12);
  --red:#D70015;
  --red-bg:rgba(255,59,48,.10);
  --orange:#C93400;
  --orange-bg:rgba(255,149,0,.12);
  --shadow:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.05);
  --bar:rgba(245,245,247,.78);
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Helvetica Neue",Inter,"Segoe UI",Roboto,Arial,sans-serif;
  --display:-apple-system,BlinkMacSystemFont,"SF Pro Display","Helvetica Neue",Inter,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --r:14px;
  --r-lg:20px;
  --max:1040px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#000000;--surface:#1C1C1E;--surface-2:#2C2C2E;
    --fill:rgba(120,120,128,.24);--fill-2:rgba(120,120,128,.16);
    --text:#F5F5F7;--muted:#98989D;--faint:#636366;--rule:rgba(255,255,255,.10);
    --accent:#F5F5F7;--accent-hover:#D1D1D6;--on-accent:#000000;
    --green:#30D158;--green-bg:rgba(48,209,88,.16);
    --red:#FF453A;--red-bg:rgba(255,69,58,.16);
    --orange:#FF9F0A;--orange-bg:rgba(255,159,10,.16);
    --shadow:none;--bar:rgba(22,22,23,.78);color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#000000;--surface:#1C1C1E;--surface-2:#2C2C2E;
  --fill:rgba(120,120,128,.24);--fill-2:rgba(120,120,128,.16);
  --text:#F5F5F7;--muted:#98989D;--faint:#636366;--rule:rgba(255,255,255,.10);
  --accent:#F5F5F7;--accent-hover:#D1D1D6;--on-accent:#000000;
  --green:#30D158;--green-bg:rgba(48,209,88,.16);
  --red:#FF453A;--red-bg:rgba(255,69,58,.16);
  --orange:#FF9F0A;--orange-bg:rgba(255,159,10,.16);
  --shadow:none;--bar:rgba(22,22,23,.78);color-scheme:dark;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:17px;line-height:1.47;letter-spacing:-.011em;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  padding-bottom:env(safe-area-inset-bottom);
}
button{font-family:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}
a{color:var(--text);text-underline-offset:3px}
.hidden{display:none !important}
b{font-weight:600}

/* ---------- header ---------- */
.masthead{
  position:sticky;top:0;z-index:20;
  background:var(--bar);
  -webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--rule);
  padding-top:env(safe-area-inset-top);
}
.brand{max-width:var(--max);margin:0 auto;padding:14px 20px 10px;display:flex;align-items:center;gap:12px}
.seal{
  width:34px;height:34px;border-radius:9px;flex:0 0 auto;
  display:grid;place-items:center;
  background:var(--accent);color:var(--on-accent);
  font-family:var(--display);font-weight:700;font-size:.72rem;letter-spacing:-.02em;
}
.brand-text h1{font-family:var(--display);font-weight:700;font-size:1.18rem;margin:0;letter-spacing:-.02em;line-height:1.1}
.brand-text p{margin:1px 0 0;font-size:.76rem;color:var(--muted);letter-spacing:0}
.theme-btn{
  margin-left:auto;border:0;background:var(--fill);color:var(--text);
  border-radius:999px;padding:7px 13px;font-size:.78rem;font-weight:500;
}
.theme-btn:hover{background:var(--fill-2)}

.tabs-wrap{max-width:var(--max);margin:0 auto;padding:0 20px 12px}
.tabs{
  display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;
  background:var(--fill-2);border-radius:11px;padding:3px;
}
.tabs::-webkit-scrollbar{display:none}
.tab{
  flex:1 0 auto;background:none;border:0;border-radius:8px;
  color:var(--text);padding:7px 14px;font-size:.84rem;font-weight:500;white-space:nowrap;
  transition:background .2s,box-shadow .2s;
}
.tab:hover{background:var(--fill-2)}
.tab.is-active{background:var(--surface);box-shadow:0 1px 3px rgba(0,0,0,.12),0 0 0 .5px rgba(0,0,0,.04);font-weight:600}
:root[data-theme="dark"] .tab.is-active{background:#636366}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tab.is-active{background:#636366}}
button:focus-visible,.tab:focus-visible{outline:3px solid var(--faint);outline-offset:2px}

/* ---------- layout ---------- */
#app{max-width:var(--max);margin:0 auto;padding:28px 20px 64px}
.view{display:none;animation:rise .35s cubic-bezier(.2,.7,.3,1)}
.view.is-active{display:block}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

h2{font-family:var(--display);font-size:1.5rem;font-weight:700;margin:0;letter-spacing:-.022em;line-height:1.15}
h3{font-family:var(--display);font-size:1.1rem;font-weight:600;margin:0 0 6px;letter-spacing:-.015em}

.panel-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:40px 0 14px}
.panel-head h2{font-size:1.25rem}
.eyebrow{font-size:.74rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}

.card{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:24px}

/* ---------- readiness hero ---------- */
.readiness{
  display:flex;gap:28px;align-items:center;flex-wrap:wrap;
  background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:28px;
}
.readiness-figure{display:flex;align-items:baseline;gap:2px;position:relative;flex:0 0 auto;padding-bottom:18px}
.readiness-num{font-family:var(--display);font-size:4.2rem;font-weight:700;line-height:.9;letter-spacing:-.04em}
.readiness-pct{font-family:var(--display);font-size:1.6rem;font-weight:600;color:var(--muted)}
.readiness-label{position:absolute;bottom:0;left:2px;font-size:.74rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.readiness-copy{flex:1 1 320px;min-width:250px}
.readiness-verdict{margin:0 0 14px;font-size:1.02rem;font-weight:500}
.readiness-bar{position:relative;height:8px;background:var(--fill);border-radius:999px;overflow:visible}
.readiness-bar span{display:block;height:100%;border-radius:999px;background:var(--accent);transition:width .6s cubic-bezier(.2,.7,.3,1)}
.readiness-bar .threshold{position:absolute;top:-4px;bottom:-4px;left:70%;width:2px;border-radius:2px;background:var(--green)}
.readiness-foot{margin:12px 0 0;font-size:.8rem;color:var(--muted)}

/* ---------- stats ---------- */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:14px}
.stat{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:16px 18px;display:flex;flex-direction:column;gap:2px}
.stat-n{font-family:var(--display);font-size:1.9rem;font-weight:700;line-height:1.05;letter-spacing:-.03em}
.stat-l{font-size:.84rem;font-weight:500}
.stat-sub{font-size:.74rem;color:var(--muted)}

/* ---------- grouped list (ledger etc.) ---------- */
.ledger,.breakdown,.num-table{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.ledger-row{
  position:relative;display:grid;grid-template-columns:30px 1fr 64px;align-items:center;gap:12px;
  padding:13px 18px;isolation:isolate;
}
.ledger-row + .ledger-row{border-top:1px solid var(--rule)}
.ledger-row::after{
  content:"";position:absolute;left:60px;right:18px;bottom:0;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--accent) var(--fill,0%),transparent var(--fill,0%));opacity:.14;
}
.lr-n{font-size:.78rem;font-weight:600;color:var(--faint);font-variant-numeric:tabular-nums}
.lr-name{font-weight:600;font-size:.95rem;line-height:1.3}
.lr-blurb{display:block;font-weight:400;font-size:.78rem;color:var(--muted);margin-top:2px}
.lr-pct{font-size:.95rem;font-weight:600;text-align:right;font-variant-numeric:tabular-nums}
.lr-pct.weak{color:var(--red)}
.lr-pct.strong{color:var(--green)}

.danger-row{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:14px 18px}
.danger-row p{margin:0;font-size:.86rem;color:var(--muted)}

/* ---------- buttons ---------- */
.solid-btn{
  background:var(--accent);color:var(--on-accent);border:0;border-radius:999px;
  padding:12px 24px;font-weight:600;font-size:.94rem;letter-spacing:-.01em;
  transition:background .15s,transform .1s,opacity .15s;
}
.solid-btn:hover{background:var(--accent-hover)}
.solid-btn:active{transform:scale(.98)}
.solid-btn:disabled{opacity:.35;cursor:default}
.ghost-btn{
  background:var(--fill);border:0;color:var(--text);border-radius:999px;
  padding:9px 16px;font-size:.86rem;font-weight:500;transition:background .15s;
}
.ghost-btn:hover{background:var(--fill-2)}
.ghost-btn:disabled{opacity:.4;cursor:default}
.ghost-btn.small{padding:6px 12px;font-size:.78rem}
.ghost-btn.danger{color:var(--red)}

/* ---------- setup panels ---------- */
.setup{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:26px}
.setup-note{color:var(--muted);font-size:.94rem;margin:8px 0 20px;max-width:64ch}
.setup-fine{color:var(--muted);font-size:.82rem;margin:18px 0 0;max-width:64ch}
.setup-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:22px}
.toggle{display:flex;align-items:center;gap:10px;font-size:.88rem;color:var(--text);cursor:pointer}
.toggle input{appearance:none;-webkit-appearance:none;width:42px;height:26px;border-radius:999px;background:var(--fill);position:relative;transition:background .2s;margin:0;flex:0 0 auto;cursor:pointer}
.toggle input::after{content:"";position:absolute;top:2px;left:2px;width:22px;height:22px;border-radius:50%;background:#fff;box-shadow:0 2px 4px rgba(0,0,0,.2);transition:transform .2s}
.toggle input:checked{background:var(--green)}
.toggle input:checked::after{transform:translateX(16px)}

.chip-grid{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--fill-2);border:0;color:var(--text);border-radius:999px;padding:7px 13px;font-size:.82rem;font-weight:500;transition:background .15s,color .15s}
.chip:hover{background:var(--fill)}
.chip.is-on{background:var(--accent);color:var(--on-accent)}
.chip.all{font-weight:600}

.len-row{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.len{background:var(--fill-2);border:0;color:var(--text);border-radius:999px;padding:8px 15px;font-size:.84rem;font-weight:500;transition:background .15s}
.len.is-active{background:var(--accent);color:var(--on-accent)}

.exam-modes{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:6px}
.exam-mode{
  background:var(--surface-2);border:2px solid transparent;border-radius:var(--r);
  padding:18px 16px;display:flex;flex-direction:column;gap:3px;align-items:flex-start;
  color:var(--muted);transition:border-color .15s,background .15s;text-align:left;
}
.exam-mode.is-active{border-color:var(--accent);background:var(--surface)}
.em-n{font-family:var(--display);font-size:2rem;font-weight:700;color:var(--text);line-height:1;letter-spacing:-.03em}
.em-l{font-size:.9rem;font-weight:600;color:var(--text)}
.em-t{font-size:.78rem}

/* ---------- levels ---------- */
.levels{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.level{
  background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:18px;
  display:flex;flex-direction:column;gap:6px;border:0;text-align:left;color:var(--text);
}
.level .lv-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.level .lv-n{font-size:.74rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.level h3{margin:0}
.level p{margin:0;font-size:.84rem;color:var(--muted)}
.level .lv-meta{font-size:.8rem;color:var(--muted)}
.level .solid-btn{align-self:flex-start;margin-top:8px;padding:9px 18px;font-size:.86rem}
.level.locked{opacity:.55}
.badge{font-size:.72rem;font-weight:600;border-radius:999px;padding:3px 9px;background:var(--fill);color:var(--muted);white-space:nowrap}
.badge.ok{background:var(--green-bg);color:var(--green)}
.badge.warn{background:var(--orange-bg);color:var(--orange)}
.badge.bad{background:var(--red-bg);color:var(--red)}

/* ---------- daily ---------- */
.daily-hero{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.daily-hero .big{font-family:var(--display);font-size:3rem;font-weight:700;letter-spacing:-.04em;line-height:1}
.daily-hero .big small{font-size:1rem;color:var(--muted);font-weight:600;margin-left:4px;letter-spacing:0}
.week{display:flex;gap:8px;margin-top:18px}
.week .day{width:34px;display:flex;flex-direction:column;align-items:center;gap:4px;font-size:.7rem;color:var(--muted);font-weight:600}
.week .dot{width:26px;height:26px;border-radius:50%;background:var(--fill-2);display:grid;place-items:center;font-size:.7rem;color:var(--on-accent)}
.week .dot.done{background:var(--green)}
.week .dot.today{box-shadow:0 0 0 2px var(--accent)}

/* ---------- flashcards ---------- */
.stage-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.stage-domain{font-size:.78rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.stage-count{font-size:.82rem;color:var(--muted);margin-left:auto;font-variant-numeric:tabular-nums}

.flashcard{perspective:1600px;cursor:pointer;outline:none}
.flashcard:focus-visible .fc-inner{box-shadow:0 0 0 3px var(--faint);border-radius:var(--r-lg)}
.fc-inner{position:relative;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.2,.7,.3,1);min-height:300px}
.flashcard.flipped .fc-inner{transform:rotateY(180deg)}
.fc-face{
  position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;
  background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);
  padding:34px 30px 28px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;
}
.fc-back{transform:rotateY(180deg)}
.fc-tag{position:absolute;top:16px;left:18px;font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.fc-body{font-family:var(--display);font-size:1.5rem;font-weight:600;line-height:1.3;max-width:48ch;letter-spacing:-.02em}
.fc-back .fc-body{font-size:1.04rem;font-weight:400;font-family:var(--sans);line-height:1.6;text-align:left;letter-spacing:-.01em}
.fc-hint{position:absolute;bottom:16px;font-size:.76rem;color:var(--faint)}

.card-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
.judge{border:0;background:var(--surface);box-shadow:var(--shadow);color:var(--text);border-radius:var(--r);padding:14px 8px;font-size:.9rem;font-weight:600;display:flex;flex-direction:column;align-items:center;gap:4px;transition:background .15s,color .15s}
.judge kbd{font-family:var(--mono);font-size:.68rem;color:var(--muted);background:var(--fill-2);border-radius:5px;padding:1px 6px}
.judge.miss:hover{background:var(--red-bg);color:var(--red)}
.judge.shaky:hover{background:var(--orange-bg);color:var(--orange)}
.judge.got:hover{background:var(--green-bg);color:var(--green)}
.card-actions.locked{opacity:.35;pointer-events:none}

.session-done{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:30px;text-align:center;margin-top:16px}
.session-done p{color:var(--muted);font-size:.94rem;margin:6px 0 18px}

/* ---------- quiz ---------- */
.quiz{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:26px}
.quiz-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.q-progress{font-size:.82rem;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums}
.q-timer{font-family:var(--mono);font-size:.95rem;font-weight:500;margin-left:auto;background:var(--fill-2);border-radius:999px;padding:4px 12px;font-variant-numeric:tabular-nums}
.q-timer.low{color:var(--red);background:var(--red-bg)}
.q-domain{font-size:.74rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.q-progressbar{height:4px;background:var(--fill-2);border-radius:999px;margin:-8px 0 22px;overflow:hidden}
.q-progressbar span{display:block;height:100%;background:var(--accent);border-radius:999px;transition:width .3s}

.q-stem{font-family:var(--display);font-size:1.3rem;font-weight:600;line-height:1.38;margin:0 0 20px;letter-spacing:-.018em}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{
  display:flex;gap:14px;align-items:flex-start;text-align:left;
  background:var(--surface-2);border:2px solid transparent;border-radius:var(--r);
  padding:14px 16px;color:var(--text);font-size:.98rem;line-height:1.45;
  transition:border-color .15s,background .15s;width:100%;
}
.opt:hover:not(:disabled){background:var(--fill)}
.opt .letter{
  font-size:.8rem;font-weight:700;color:var(--muted);background:var(--surface);
  border-radius:50%;width:26px;height:26px;display:grid;place-items:center;flex:0 0 auto;
}
.opt.chosen{border-color:var(--accent)}
.opt.chosen .letter{background:var(--accent);color:var(--on-accent)}
.opt.right{border-color:var(--green);background:var(--green-bg)}
.opt.right .letter{background:var(--green);color:#fff}
.opt.wrong{border-color:var(--red);background:var(--red-bg)}
.opt.wrong .letter{background:var(--red);color:#fff}
.opt:disabled{cursor:default}

.confidence{margin-top:16px;padding:16px;border-radius:var(--r);background:var(--surface-2)}
.confidence p{margin:0 0 10px;font-size:.9rem;font-weight:600}
.conf-row{display:flex;gap:8px;flex-wrap:wrap}
.conf-btn{border:0;border-radius:999px;padding:9px 16px;font-size:.88rem;font-weight:600;background:var(--surface);color:var(--text);box-shadow:var(--shadow)}
.conf-btn[data-c="2"]:hover{background:var(--green-bg);color:var(--green)}
.conf-btn[data-c="1"]:hover{background:var(--orange-bg);color:var(--orange)}
.conf-btn[data-c="0"]:hover{background:var(--red-bg);color:var(--red)}
.conf-btn kbd{font-family:var(--mono);font-size:.68rem;color:var(--muted);margin-left:6px}

.explain{margin-top:18px;padding:16px 18px;background:var(--surface-2);border-radius:var(--r)}
.explain .ex-tag{font-size:.74rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);display:block;margin-bottom:6px}
.explain.good .ex-tag{color:var(--green)}
.explain.bad .ex-tag{color:var(--red)}
.explain p{margin:0;font-size:.95rem;line-height:1.6}
.explain .conf-note{margin-top:10px;font-size:.86rem;color:var(--orange);font-weight:500}

.quiz-nav{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap;align-items:center}

/* ---------- results ---------- */
.result-head{background:var(--surface-2);border-radius:var(--r-lg);padding:30px;text-align:center;margin-bottom:24px}
.result-score{font-family:var(--display);font-size:4.4rem;font-weight:700;line-height:1;margin:0;letter-spacing:-.045em}
.result-score.pass{color:var(--green)}
.result-score.fail{color:var(--red)}
.result-verdict{font-size:.82rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:10px 0 0}
.result-line{margin:12px 0 0;font-size:.98rem}

.bd-row{display:grid;grid-template-columns:1fr 96px;gap:10px;align-items:center;padding:12px 18px;font-size:.92rem}
.bd-row + .bd-row{border-top:1px solid var(--rule)}
.bd-score{font-size:.88rem;text-align:right;font-variant-numeric:tabular-nums}
.breakdown{margin-bottom:24px}

.review-item{background:var(--surface-2);border-radius:var(--r);padding:18px;margin-bottom:10px}
.review-item .q-domain{margin-bottom:6px;display:block}
.review-q{font-weight:600;font-size:1rem;margin:0 0 10px;line-height:1.45}
.review-a{font-size:.9rem;margin:0 0 4px}
.review-a .lbl{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-right:8px}
.review-a.yours{color:var(--red)}
.review-a.correct{color:var(--green)}
.review-why{font-size:.9rem;color:var(--muted);margin:10px 0 0;line-height:1.6;padding-top:10px;border-top:1px solid var(--rule)}

/* ---------- rapid fire ---------- */
.rf-stage{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:26px}
.rf-top{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.rf-score{font-size:.9rem;font-weight:600;font-variant-numeric:tabular-nums}
.rf-streak{font-size:.82rem;color:var(--muted)}
.rf-clock{margin-left:auto;font-family:var(--mono);font-size:1.05rem;font-weight:600;background:var(--fill-2);border-radius:999px;padding:4px 14px;font-variant-numeric:tabular-nums}
.rf-clock.low{color:var(--red);background:var(--red-bg)}
.rf-claim{background:var(--surface-2);border-radius:var(--r);padding:16px 18px;margin:14px 0 20px}
.rf-claim .eyebrow{display:block;margin-bottom:6px}
.rf-claim p{margin:0;font-size:1.08rem;font-weight:600;line-height:1.45}
.rf-buttons{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.rf-btn{border:0;border-radius:var(--r);padding:18px;font-size:1.05rem;font-weight:700;color:#fff}
.rf-btn.t{background:var(--green)}
.rf-btn.f{background:var(--red)}
.rf-btn kbd{display:block;font-family:var(--mono);font-size:.7rem;font-weight:500;opacity:.8;margin-top:2px}
.rf-flash{text-align:center;font-weight:700;font-size:.92rem;height:22px;margin-top:12px}
.rf-flash.ok{color:var(--green)}
.rf-flash.no{color:var(--red)}

/* ---------- ready checklist + calibration ---------- */
.checklist{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.check{display:grid;grid-template-columns:28px 1fr auto;gap:12px;align-items:center;padding:13px 18px}
.check + .check{border-top:1px solid var(--rule)}
.check .tick{width:22px;height:22px;border-radius:50%;border:2px solid var(--faint);display:grid;place-items:center;font-size:.72rem;font-weight:800;color:#fff}
.check.met .tick{background:var(--green);border-color:var(--green)}
.check .c-label{font-size:.93rem;font-weight:500}
.check .c-sub{display:block;font-size:.78rem;color:var(--muted);font-weight:400}
.check .c-val{font-size:.86rem;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums;text-align:right}
.check.met .c-val{color:var(--green)}
.ready-actions{display:flex;gap:10px;align-items:center;margin-top:14px;flex-wrap:wrap}

.calib{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.calib .stat-n.green{color:var(--green)}
.calib .stat-n.orange{color:var(--orange)}
.calib .stat-n.red{color:var(--red)}
.calib-note{font-size:.84rem;color:var(--muted);margin:12px 0 0}

/* ---------- certificate ---------- */
.cert-wrap{position:fixed;inset:0;z-index:60;background:rgba(0,0,0,.45);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:20px}
.cert{
  width:100%;max-width:640px;background:#FFFFFF;color:#1D1D1F;border-radius:24px;padding:48px 44px;text-align:center;
  box-shadow:0 30px 80px rgba(0,0,0,.35);position:relative;
}
.cert .seal{margin:0 auto 18px;width:56px;height:56px;border-radius:15px;font-size:1rem;background:#1D1D1F;color:#fff}
.cert .eyebrow{color:#6E6E73}
.cert h2{font-size:2.1rem;margin:8px 0 6px;color:#1D1D1F}
.cert .cert-name{font-family:var(--display);font-size:1.6rem;font-weight:600;margin:22px 0 4px;border-bottom:1px solid #D2D2D7;padding-bottom:10px;display:inline-block;min-width:60%}
.cert input.cert-name{border:0;border-bottom:1px solid #D2D2D7;text-align:center;background:transparent;color:#1D1D1F;font-family:var(--display);outline:none}
.cert p{color:#6E6E73;font-size:.92rem;margin:10px 0 0}
.cert .cert-stats{display:flex;justify-content:center;gap:28px;margin:24px 0 6px;flex-wrap:wrap}
.cert .cert-stats div{display:flex;flex-direction:column}
.cert .cert-stats b{font-size:1.5rem;font-family:var(--display);color:#1D1D1F}
.cert .cert-stats span{font-size:.74rem;color:#6E6E73;text-transform:uppercase;letter-spacing:.05em;font-weight:600}
.cert-actions{display:flex;gap:10px;justify-content:center;margin-top:26px}
.cert-actions .solid-btn{background:#1D1D1F;color:#fff}
.cert-actions .ghost-btn{background:#F2F2F4;color:#1D1D1F}

/* ---------- footer ---------- */
.foot{margin-top:24px}
.foot p{max-width:var(--max);margin:0 auto;padding:20px;font-size:.76rem;color:var(--muted);line-height:1.6}
.foot a{color:var(--muted)}

/* ---------- reference & glossary ---------- */
.ref-intro h2{margin-bottom:4px}
.ref-intro .setup-note{margin-top:8px}

.num-group{margin-bottom:24px}
.num-h{font-size:.76rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 8px 4px}
.num-row{display:grid;grid-template-columns:1fr 140px 1.1fr;gap:14px;align-items:baseline;padding:12px 18px}
.num-row + .num-row{border-top:1px solid var(--rule)}
.num-k{font-size:.92rem;font-weight:500}
.num-v{font-size:.92rem;font-weight:700;text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
.num-note{font-size:.8rem;color:var(--muted)}

.memo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:12px}
.memo{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:18px}
.memo .memo-key{font-family:var(--display);font-size:1.25rem;font-weight:700;letter-spacing:-.02em;margin:4px 0 6px}
.memo p{margin:0;font-size:.88rem;color:var(--muted);line-height:1.55}
.memo p + p{margin-top:8px}
.memo b{color:var(--text)}
.formula{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:18px;margin-bottom:12px}
.formula h3{margin:0 0 8px}
.formula .eq{font-family:var(--mono);font-size:.9rem;background:var(--surface-2);border-radius:10px;padding:10px 12px;margin:0 0 10px;overflow-x:auto;white-space:pre-wrap}
.formula p{margin:0;font-size:.88rem;color:var(--muted);line-height:1.55}
.formula p + p{margin-top:6px}
.formula b{color:var(--text)}

.guide{display:flex;flex-direction:column;gap:10px}
.guide-item{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.guide-item summary{display:flex;align-items:center;gap:12px;cursor:pointer;list-style:none;padding:15px 18px;font-weight:600;font-size:.98rem}
.guide-item summary::-webkit-details-marker{display:none}
.guide-item summary::after{content:"";margin-left:auto;width:8px;height:8px;border-right:2px solid var(--faint);border-bottom:2px solid var(--faint);transform:rotate(45deg);transition:transform .2s}
.guide-item[open] summary::after{transform:rotate(-135deg)}
.guide-item ul{margin:0;padding:0 20px 16px 50px;display:flex;flex-direction:column;gap:9px}
.guide-item li{font-size:.92rem;line-height:1.55}
.guide-item li::marker{color:var(--faint)}

.glossary-tools{display:flex;flex-direction:column;gap:12px;margin-bottom:14px}
.glossary-search{width:100%;background:var(--fill-2);border:0;border-radius:12px;color:var(--text);padding:12px 16px;font-family:var(--sans);font-size:1rem}
.glossary-search:focus{outline:3px solid var(--faint)}
.glossary-search::placeholder{color:var(--muted)}
.glossary-count{font-size:.8rem;color:var(--muted);margin:0 0 12px}
.glossary-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}
.gl-item{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:16px 18px}
.gl-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:6px}
.gl-term{font-weight:700;font-size:1.02rem;line-height:1.25}
.gl-head .q-domain{flex:0 0 auto;text-align:right;font-size:.66rem}
.gl-def{margin:0;font-size:.9rem;line-height:1.55;color:var(--muted)}
.gl-def b{color:var(--text)}
.gl-empty{color:var(--muted);font-size:.94rem;padding:18px 0}

/* ---------- responsive ---------- */
@media (max-width:640px){
  body{font-size:16px}
  #app{padding:20px 16px 50px}
  .brand{padding:12px 16px 8px}
  .brand-text p{display:none}
  .tabs-wrap{padding:0 16px 10px}
  .tab{padding:7px 11px;font-size:.8rem}
  .readiness{padding:20px;gap:16px}
  .readiness-num{font-size:3.4rem}
  .setup,.quiz,.rf-stage{padding:18px}
  .fc-body{font-size:1.2rem}
  .fc-back .fc-body{font-size:.96rem}
  .fc-inner{min-height:330px}
  .q-stem{font-size:1.1rem}
  .ledger-row{grid-template-columns:26px 1fr 52px;padding:12px 14px;gap:9px}
  .ledger-row::after{left:50px;right:14px}
  .judge{font-size:.8rem;padding:12px 4px}
  .result-score{font-size:3.4rem}
  .num-row{grid-template-columns:1fr auto;row-gap:4px;column-gap:12px}
  .num-note{grid-column:1 / -1;order:3}
  .num-v{order:2}
  .cert{padding:34px 22px}
  .cert h2{font-size:1.6rem}
}

@media print{
  body *{visibility:hidden}
  .cert-wrap,.cert-wrap *{visibility:visible}
  .cert-wrap{position:absolute;inset:0;background:none;backdrop-filter:none}
  .cert{box-shadow:none}
  .cert-actions{display:none}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
}