/* ============ Design tokens ============ */
:root {
  --font: "Heebo", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --r-sm: 10px; --r: 16px; --r-lg: 22px; --r-pill: 999px;
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 20px; --s6: 24px; --s8: 32px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --tab-h: 64px;

  --bg: #f3f4f9;
  --surface: #ffffff;
  --surface-2: #f5f6fb;
  --text: #11142b;
  --text-2: #474c6b;
  --muted: #6b7091;
  --line: #e3e5f0;
  --primary: #4f46e5;
  --primary-ink: #4338ca;
  --primary-soft: #eef0ff;
  --on-primary: #ffffff;
  --accent: #f59e0b;
  --accent-soft: #fff4dc;
  --ok: #059669; --ok-soft: #e5f7f0; --ok-line: #6ee7b7;
  --bad: #dc2626; --bad-soft: #fdeceb; --bad-line: #fca5a5;
  --warn: #b45309; --warn-soft: #fff3e0;
  --hero-1: #1e1b4b; --hero-2: #4338ca;
  --shadow-1: 0 1px 2px rgba(17, 20, 43, .06);
  --shadow-2: 0 8px 28px rgba(17, 20, 43, .10);
  --c-rules: #4f46e5; --c-signs: #e11d48; --c-safety: #059669; --c-vehicle: #d97706;
}
:root[data-theme="dark"] {
  --bg: #0c0d18;
  --surface: #151729;
  --surface-2: #1c1f35;
  --text: #eceefb;
  --text-2: #b7bbd6;
  --muted: #8a8fb0;
  --line: #2a2e4a;
  --primary: #8b85ff;
  --primary-ink: #a7a2ff;
  --primary-soft: rgba(139, 133, 255, .15);
  --on-primary: #0d0b2e;
  --accent: #fbbf24;
  --accent-soft: rgba(251, 191, 36, .14);
  --ok: #34d399; --ok-soft: rgba(52, 211, 153, .13); --ok-line: #059669;
  --bad: #f87171; --bad-soft: rgba(248, 113, 113, .13); --bad-line: #b91c1c;
  --warn: #fbbf24; --warn-soft: rgba(251, 191, 36, .13);
  --hero-1: #17153d; --hero-2: #3730a3;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-2: 0 10px 30px rgba(0, 0, 0, .4);
  --c-rules: #8b85ff; --c-signs: #fb7185; --c-safety: #34d399; --c-vehicle: #fbbf24;
}

/* ============ Base ============ */
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body {
  font-family: var(--font); font-size: 16px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: calc(var(--tab-h) + env(safe-area-inset-bottom) + var(--s4));
  min-height: 100dvh;
}
body.focus { padding-bottom: calc(96px + env(safe-area-inset-bottom)); }
body.focus .tabs, body.focus .top { display: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; touch-action: manipulation; }
a { color: var(--primary); text-decoration: none; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 6px; }
.ic { width: 20px; height: 20px; flex: none; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.ic.sm { width: 16px; height: 16px; }
.ic.lg { width: 26px; height: 26px; }
[dir="rtl"] .flip { transform: scaleX(-1); }
.num { font-variant-numeric: tabular-nums; direction: ltr; unicode-bidi: isolate; }
.muted { color: var(--muted); }
.t2 { color: var(--text-2); }
.small { font-size: 13.5px; }
.xs { font-size: 12px; }
.b { font-weight: 700; }
.row { display: flex; align-items: center; gap: var(--s2); }
.row.between { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
.center { text-align: center; }

/* ============ App bar ============ */
.top {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between;
  gap: var(--s3); padding: var(--s3) var(--s4);
  background: color-mix(in srgb, var(--bg) 84%, transparent); backdrop-filter: saturate(1.6) blur(14px);
}
.top .title { font-weight: 800; font-size: 18px; display: flex; align-items: center; gap: 10px; letter-spacing: -.2px; }
.mark { width: 30px; height: 30px; border-radius: 9px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  background: linear-gradient(160deg, #23234a, #0f1027); }
.tl { width: 6px; height: 6px; border-radius: 50%; display: block; }
.tl.r { background: #f87171; } .tl.y { background: #fbbf24; } .tl.g { background: #34d399; box-shadow: 0 0 6px #34d399; }
.chip { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--surface);
  border-radius: var(--r-pill); padding: 6px 12px; font-weight: 700; font-size: 13.5px; min-height: 36px; }
.chip .ic { color: var(--accent); }

main { padding: 0 var(--s4); max-width: 640px; margin: 0 auto; }
.enter { animation: enter .28s var(--ease) both; }
@keyframes enter { from { opacity: 0; transform: translateY(8px); } }

/* ============ Tab bar ============ */
.tabs {
  position: fixed; inset: auto 0 0 0; z-index: 30; display: grid; grid-template-columns: repeat(4, 1fr);
  height: calc(var(--tab-h) + env(safe-area-inset-bottom)); padding: 6px 6px env(safe-area-inset-bottom);
  background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(16px);
  border-top: 1px solid var(--line);
}
.tabs button { border: 0; background: none; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; font-size: 11.5px; font-weight: 600; color: var(--muted); min-height: 48px; }
.tabs .pill { width: 52px; height: 30px; border-radius: var(--r-pill); display: grid; place-items: center; transition: background .2s var(--ease); }
.tabs button.on { color: var(--primary); }
.tabs button.on .pill { background: var(--primary-soft); }

/* ============ Surfaces ============ */
.card { background: var(--surface); border-radius: var(--r-lg); padding: var(--s5); margin: var(--s3) 0; box-shadow: var(--shadow-1);
  border: 1px solid color-mix(in srgb, var(--line) 60%, transparent); }
.card.tight { padding: var(--s4); }
.sec-h { display: flex; align-items: center; justify-content: space-between; gap: var(--s2); margin: 0 0 var(--s3); }
.sec-h h3 { margin: 0; font-size: 17px; font-weight: 800; display: flex; align-items: center; gap: var(--s2); letter-spacing: -.2px; }
.sec-h h3 .ic { color: var(--primary); }
.label { font-size: 13px; font-weight: 700; color: var(--muted); margin: var(--s5) 4px var(--s2); text-transform: none; }
h1.page { font-size: 24px; font-weight: 800; letter-spacing: -.4px; margin: var(--s2) 4px var(--s3); }

/* ============ Buttons ============ */
.btn { border: 0; border-radius: 14px; min-height: 52px; padding: 0 var(--s5); display: inline-flex; align-items: center; justify-content: center;
  gap: var(--s2); font-weight: 700; font-size: 16px; background: var(--primary); color: var(--on-primary);
  transition: transform .12s var(--ease), background .2s, opacity .2s; }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .45; pointer-events: none; }
.btn.block { width: 100%; }
.btn.soft { background: var(--primary-soft); color: var(--primary-ink); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn.danger { background: var(--bad-soft); color: var(--bad); }
.btn.sm { min-height: 40px; font-size: 14px; padding: 0 var(--s4); border-radius: 12px; }
.btn.white { background: #fff; color: #1e1b4b; }
.btn.gold { background: linear-gradient(135deg, #fbbf24, #f59e0b); color: #3b2300; }
.iconbtn { width: 44px; height: 44px; border-radius: 12px; border: 0; background: var(--surface-2); display: grid; place-items: center; color: var(--text-2); }
.iconbtn.on { color: var(--accent); background: var(--accent-soft); }
.iconbtn.on .ic { fill: currentColor; }

/* ============ Hero ============ */
.hero { position: relative; overflow: hidden; border-radius: var(--r-lg); padding: var(--s5); margin: var(--s2) 0 var(--s3);
  color: #fff; background: radial-gradient(120% 140% at 100% 0%, var(--hero-2) 0%, var(--hero-1) 62%); box-shadow: var(--shadow-2); }
.hero::after { content: ""; position: absolute; inset-inline-start: -40px; bottom: -60px; width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, .10), transparent 70%); pointer-events: none; }
.hero .hi { font-size: 14px; opacity: .8; }
.hero .lvl { font-size: 22px; font-weight: 800; letter-spacing: -.3px; margin: 2px 0 var(--s1); }
.hero .sub { font-size: 13.5px; opacity: .78; }
.hero-grid { display: flex; align-items: center; gap: var(--s4); }
.hero .btn { margin-top: var(--s4); }
.exam-chip { display: inline-flex; align-items: center; gap: 6px; margin-top: var(--s3); padding: 6px 12px; border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .16); color: #fff; font-size: 13px; font-weight: 600; }

/* ring */
.ring { position: relative; flex: none; display: grid; place-items: center; }
.ring svg { transform: rotate(-90deg); display: block; }
.ring .v { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; line-height: 1.05; }
.ring .v b { font-size: 26px; font-weight: 800; letter-spacing: -.5px; }
.ring .v small { display: block; font-size: 11px; opacity: .75; font-weight: 600; margin-top: 2px; }
.ring.lg .v b { font-size: 34px; }

/* ============ Stat tiles ============ */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s2); }
.stat { background: var(--surface-2); border-radius: var(--r); padding: var(--s3); text-align: center; }
.stat b { display: block; font-size: 20px; font-weight: 800; letter-spacing: -.3px; }
.stat span { font-size: 12px; color: var(--muted); font-weight: 600; }
.stat .ic { color: var(--accent); margin-bottom: 2px; }

.goalbar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; margin-top: var(--s2); }
.goalbar i { display: block; height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--primary), #a78bfa); transition: width .5s var(--ease); }

/* ============ Tiles ============ */
.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s3); margin: var(--s3) 0; }
.tile { border: 1px solid color-mix(in srgb, var(--line) 60%, transparent); background: var(--surface); border-radius: var(--r-lg); padding: var(--s4);
  text-align: start; box-shadow: var(--shadow-1); display: flex; flex-direction: column; gap: var(--s2); min-height: 112px;
  transition: transform .12s var(--ease); }
.tile:active { transform: scale(.98); }
.tile .ico { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; }
.tile b { font-size: 15.5px; }
.tile span { font-size: 12.5px; color: var(--muted); line-height: 1.35; }
.ico.p { background: var(--primary-soft); color: var(--primary); }
.ico.a { background: var(--accent-soft); color: var(--warn); }
.ico.r { background: var(--bad-soft); color: var(--bad); }
.ico.g { background: var(--ok-soft); color: var(--ok); }

/* list rows */
.list { display: flex; flex-direction: column; }
.li { display: flex; align-items: center; gap: var(--s3); padding: var(--s3) 0; border: 0; background: none; width: 100%; text-align: start; }
.li + .li { border-top: 1px solid var(--line); }
.li .ico { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; flex: none; }
.li .grow b { display: block; font-size: 15.5px; }
.li .grow span { font-size: 13px; color: var(--muted); }
.li .end { color: var(--muted); font-weight: 700; font-size: 14px; display: flex; align-items: center; gap: 4px; }
.badge { display: inline-flex; align-items: center; justify-content: center; min-width: 26px; height: 24px; padding: 0 8px; border-radius: 99px;
  background: var(--surface-2); color: var(--text-2); font-size: 12.5px; font-weight: 700; }
.badge.r { background: var(--bad-soft); color: var(--bad); }
.badge.g { background: var(--ok-soft); color: var(--ok); }
.badge.p { background: var(--primary-soft); color: var(--primary-ink); }

/* category bars */
.catbar { margin: var(--s3) 0; }
.catbar .row { font-size: 14px; }
.catbar .track { position: relative; height: 10px; border-radius: 99px; background: var(--surface-2); overflow: hidden; margin-top: 6px; }
.catbar .track i { position: absolute; inset-block: 0; inset-inline-start: 0; border-radius: 99px; }
.catbar .track i.seen { opacity: .28; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex: none; }

/* ============ Quiz ============ */
.qbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: var(--s3); padding: var(--s3) 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(12px); }
.qprog { flex: 1; height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.qprog i { display: block; height: 100%; background: var(--primary); border-radius: 99px; transition: width .35s var(--ease); }
.timer { font-weight: 800; font-size: 15px; padding: 6px 12px; border-radius: 99px; background: var(--surface); border: 1px solid var(--line); display: inline-flex; gap: 6px; align-items: center; }
.timer.low { color: var(--bad); border-color: var(--bad-line); background: var(--bad-soft); }
.qcard { background: var(--surface); border-radius: var(--r-lg); padding: var(--s5); box-shadow: var(--shadow-1); margin-top: var(--s2);
  border: 1px solid color-mix(in srgb, var(--line) 60%, transparent); }
.qmeta { display: flex; align-items: center; gap: var(--s2); font-size: 12.5px; font-weight: 700; color: var(--muted); margin-bottom: var(--s2); }
.qmeta .tag { padding: 3px 10px; border-radius: 99px; background: var(--surface-2); }
.qtext { font-size: 18.5px; font-weight: 700; line-height: 1.45; letter-spacing: -.1px; margin: 0; }
.qimg { display: block; margin: var(--s4) auto 0; max-width: 100%; max-height: 220px; border-radius: 12px; background: #fff; padding: 6px; object-fit: contain; }
.answers { display: flex; flex-direction: column; gap: var(--s2); margin-top: var(--s4); }
.ans { display: flex; align-items: flex-start; gap: var(--s3); width: 100%; text-align: start; border: 1.5px solid var(--line); background: var(--surface);
  border-radius: 14px; padding: 14px var(--s4); font-size: 16px; line-height: 1.45; transition: border-color .15s, background .15s, transform .1s; min-height: 56px; }
.ans:active { transform: scale(.99); }
.ans .k { width: 26px; height: 26px; border-radius: 8px; flex: none; display: grid; place-items: center; font-size: 13px; font-weight: 800;
  background: var(--surface-2); color: var(--text-2); margin-top: 1px; }
.ans.sel { border-color: var(--primary); background: var(--primary-soft); }
.ans.sel .k { background: var(--primary); color: var(--on-primary); }
.ans.ok { border-color: var(--ok-line); background: var(--ok-soft); }
.ans.ok .k { background: var(--ok); color: #fff; }
.ans.no { border-color: var(--bad-line); background: var(--bad-soft); }
.ans.no .k { background: var(--bad); color: #fff; }
.ans.dim { opacity: .55; }
.answers.done .ans { pointer-events: none; }
.feedback { display: flex; align-items: center; gap: var(--s2); margin-top: var(--s4); padding: var(--s3) var(--s4); border-radius: 14px; font-weight: 700; animation: enter .25s var(--ease); }
.feedback.ok { background: var(--ok-soft); color: var(--ok); }
.feedback.no { background: var(--bad-soft); color: var(--bad); }
.feedback small { display: block; font-weight: 500; color: var(--text-2); }
.dock { position: fixed; inset: auto 0 0 0; z-index: 25; padding: var(--s3) var(--s4) calc(var(--s3) + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(14px); border-top: 1px solid var(--line); }
.dock .in { max-width: 640px; margin: 0 auto; display: flex; gap: var(--s2); }
.dock .btn { flex: 1; }
[lang] .qtext[dir="ltr"], [lang] .answers[dir="ltr"] { text-align: left; }

/* exam grid */
.qgrid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.qgrid button { aspect-ratio: 1; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); font-weight: 700; font-size: 14px; }
.qgrid button.done { background: var(--primary-soft); border-color: transparent; color: var(--primary-ink); }
.qgrid button.cur { border-color: var(--primary); }
.qgrid button.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.qgrid button.no { background: var(--bad-soft); color: var(--bad); border-color: transparent; }

/* result */
.result { text-align: center; padding: var(--s6) var(--s5); }
.result .big { font-size: 56px; font-weight: 800; letter-spacing: -1px; line-height: 1; margin: var(--s3) 0 var(--s2); }
.result h2 { margin: 0; font-size: 22px; font-weight: 800; }
.result.pass { background: linear-gradient(160deg, var(--ok-soft), var(--surface) 70%); }
.result.fail { background: linear-gradient(160deg, var(--bad-soft), var(--surface) 70%); }
.result .emoji { font-size: 44px; }
.seg { display: inline-flex; background: var(--surface-2); padding: 4px; border-radius: 12px; gap: 4px; }
.seg button { border: 0; background: none; padding: 8px 14px; border-radius: 9px; font-weight: 700; font-size: 13.5px; color: var(--muted); }
.seg button.on { background: var(--surface); color: var(--text); box-shadow: var(--shadow-1); }
.rev { padding: var(--s4) 0; }
.rev + .rev { border-top: 1px solid var(--line); }
.rev .qtext { font-size: 16px; }
.rev .ans { min-height: 0; padding: 10px 12px; font-size: 14.5px; }

/* charts */
.chart { width: 100%; display: block; }
.chart text { fill: var(--muted); font-size: 11px; font-family: var(--font); }
.legend { display: flex; gap: var(--s4); flex-wrap: wrap; font-size: 12.5px; color: var(--muted); margin-top: var(--s2); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }

/* settings */
.set { display: flex; align-items: center; justify-content: space-between; gap: var(--s3); padding: var(--s3) 0; }
.set + .set { border-top: 1px solid var(--line); }
.set .grow b { display: block; font-size: 15px; }
.set .grow span { font-size: 13px; color: var(--muted); }
.select, .date { min-height: 42px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface-2); padding: 0 12px; font-weight: 600; }
.switch { position: relative; width: 50px; height: 30px; border-radius: 99px; background: var(--line); border: 0; transition: background .2s; flex: none; }
.switch::after { content: ""; position: absolute; top: 3px; inset-inline-start: 3px; width: 24px; height: 24px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.25); transition: inset-inline-start .2s var(--ease); }
.switch.on { background: var(--primary); }
.switch.on::after { inset-inline-start: 23px; }
.langs { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s2); }
.langs button { min-height: 46px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); font-weight: 700; font-size: 14.5px; }
.langs button.on { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-ink); }

/* paywall */
.pay { border-radius: var(--r-lg); padding: var(--s5); margin: var(--s3) 0; color: #fff;
  background: radial-gradient(130% 140% at 0% 0%, #7c3aed 0%, #312e81 60%, #1e1b4b 100%); box-shadow: var(--shadow-2); }
.pay h3 { margin: 0 0 6px; font-size: 19px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.pay p { margin: 0 0 var(--s4); opacity: .85; font-size: 14.5px; }
.pay .feat { display: grid; gap: 6px; margin: 0 0 var(--s4); padding: 0; list-style: none; font-size: 14px; }
.pay .feat li { display: flex; gap: 8px; align-items: center; }
.pay .feat .ic { color: #fbbf24; }
.pay .fine { font-size: 12px; opacity: .7; text-align: center; margin-top: var(--s2); }
.trialbar { display: flex; align-items: center; gap: var(--s2); padding: 10px 14px; border-radius: 14px; background: var(--accent-soft); color: var(--warn);
  font-weight: 700; font-size: 13.5px; margin: var(--s2) 0; border: 0; width: 100%; text-align: start; }

/* search */
.search { position: relative; margin: var(--s2) 0 var(--s3); }
.search input { width: 100%; min-height: 48px; border-radius: 14px; border: 1.5px solid var(--line); background: var(--surface); padding: 0 44px; font-size: 15.5px; outline: none; }
.search input:focus { border-color: var(--primary); }
.search .ic { position: absolute; top: 50%; inset-inline-start: 14px; transform: translateY(-50%); color: var(--muted); }
.chips { display: flex; gap: var(--s2); overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; }
.chips button { flex: none; border: 1.5px solid var(--line); background: var(--surface); border-radius: 99px; padding: 7px 14px; font-weight: 700; font-size: 13.5px; color: var(--text-2); }
.chips button.on { background: var(--text); color: var(--bg); border-color: var(--text); }

/* empty / skeleton / toast / sheet */
.empty { text-align: center; padding: var(--s8) var(--s4); color: var(--muted); }
.empty .ic { width: 44px; height: 44px; color: var(--primary); opacity: .6; margin-bottom: var(--s2); }
.sk { border-radius: 12px; background: linear-gradient(90deg, var(--surface-2), var(--line), var(--surface-2)); background-size: 200% 100%; animation: sk 1.2s infinite; }
@keyframes sk { to { background-position: -200% 0; } }
.toast { position: fixed; left: 50%; bottom: calc(var(--tab-h) + 24px + env(safe-area-inset-bottom)); transform: translate(-50%, 20px); opacity: 0;
  background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 99px; font-weight: 600; font-size: 14px; z-index: 60;
  transition: opacity .2s, transform .2s var(--ease); pointer-events: none; max-width: 90vw; text-align: center; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.sheet-bg { position: fixed; inset: 0; background: rgba(5, 6, 20, .45); z-index: 50; animation: fade .2s; }
@keyframes fade { from { opacity: 0; } }
.sheet { position: fixed; inset: auto 0 0 0; z-index: 51; background: var(--surface); border-radius: 22px 22px 0 0; padding: var(--s5) var(--s4) calc(var(--s5) + env(safe-area-inset-bottom));
  max-width: 640px; margin: 0 auto; box-shadow: var(--shadow-2); animation: up .28s var(--ease); max-height: 86dvh; overflow-y: auto; }
@keyframes up { from { transform: translateY(100%); } }
.sheet h3 { margin: 0 0 var(--s2); font-size: 18px; font-weight: 800; }
.sheet p { margin: 0 0 var(--s4); color: var(--text-2); }
.sheet .acts { display: flex; gap: var(--s2); }
.sheet .acts .btn { flex: 1; }
.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 70; overflow: hidden; }
.confetti i { position: absolute; top: -12px; width: 8px; height: 14px; border-radius: 2px; animation: fall linear forwards; }
@keyframes fall { to { transform: translateY(110vh) rotate(720deg); } }
/* ============ v2: cleaner layout ============ */
.card { box-shadow: none; border: 1px solid var(--line); }
.tile, .signcard { box-shadow: none; border: 1px solid var(--line); }
.label { margin-top: var(--s6); }
.iconbtn.plain { background: transparent; width: 40px; height: 40px; color: var(--text-2); }
.hero .btn { margin-top: var(--s4); }
.hero .exam-chip { margin-top: var(--s3); }
/* today */
.today .minis { display: flex; justify-content: space-between; gap: var(--s2); margin-top: var(--s3); font-size: 13.5px; color: var(--muted); }
.today .minis span { display: inline-flex; align-items: center; gap: 5px; }
.today .minis b { color: var(--text); font-size: 15px; }
.today .minis .ic { color: var(--accent); }
/* quota line */
.quota { display: flex; align-items: center; gap: var(--s2); width: 100%; margin-top: var(--s3); padding: 10px 14px; border-radius: 12px;
  border: 0; background: var(--surface-2); color: var(--text-2); font-size: 13.5px; font-weight: 600; text-align: start; }
h1.page + .quota { margin: 0 0 var(--s3); }
.quota .up { display: inline-flex; align-items: center; gap: 4px; color: var(--warn); font-weight: 800; flex: none; }
/* practice */
.bigcta { display: flex; align-items: center; gap: var(--s3); width: 100%; border: 0; text-align: start; color: #fff; padding: var(--s4) var(--s5);
  border-radius: var(--r-lg); background: radial-gradient(120% 140% at 100% 0%, var(--hero-2) 0%, var(--hero-1) 70%); box-shadow: var(--shadow-2); }
.bigcta .ico { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: rgba(255,255,255,.14); color: #fbbf24; flex: none; }
.bigcta b { display: block; font-size: 17px; }
.bigcta .grow span { font-size: 13px; opacity: .78; }
.catgrid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s3); }
.catcard { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; padding: var(--s4); border-radius: var(--r-lg); text-align: start;
  background: var(--surface); border: 1px solid var(--line); }
.catcard .ico { width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent); }
.catcard b { font-size: 15px; }
.catcard .track { position: relative; width: 100%; height: 6px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.catcard .track i { position: absolute; inset-block: 0; inset-inline-start: 0; border-radius: 99px; background: var(--c); }
.catcard .track i.seen { opacity: .28; }
/* answer result: feedback + explanation in one box */
.result-box { margin-top: var(--s4); border-radius: 16px; overflow: hidden; animation: enter .25s var(--ease); }
.result-box .feedback { margin: 0; border-radius: 0; animation: none; }
.result-box.ok .feedback { background: var(--ok-soft); color: var(--ok); }
.result-box.no .feedback { background: var(--bad-soft); color: var(--bad); }
.result-box .expl { margin: 0; border-radius: 0; }
.result-box #exBox:empty { display: none; }
/* paywall v2 */
.pay-h { display: flex; align-items: center; gap: 8px; font-size: 19px; margin-bottom: 6px; }
.pay p, .sheet .pay p { color: rgba(255, 255, 255, .86); opacity: 1; margin: 0 0 var(--s4); }
.pay-h .ic { color: #fbbf24; }
.pay .price { text-align: center; padding: var(--s3); margin: 0 0 var(--s3); border-radius: 14px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12); }
.pay .price-main { font-size: 30px; font-weight: 800; letter-spacing: -.5px; line-height: 1.1; }
.pay .price-sub { font-size: 12.5px; opacity: .8; margin-top: 4px; }
.pay .fine { display: flex; gap: 6px; align-items: flex-start; text-align: start; line-height: 1.5; font-size: 12px; opacity: .8;
  margin-top: var(--s3); padding-top: var(--s3); border-top: 1px solid rgba(255,255,255,.12); }
.sheet.paysheet { padding-bottom: 0; }
.sheet.paysheet .pay { border-radius: 22px 22px 0 0; padding-bottom: calc(var(--s4) + env(safe-area-inset-bottom)); }
.sheet.paysheet .pay p { font-size: 14px; margin-bottom: var(--s3); }
.sheet.paysheet .feat { gap: 4px; margin-bottom: var(--s3); }
.sheet.paysheet #buyBtn { position: sticky; bottom: calc(var(--s3) + env(safe-area-inset-bottom)); box-shadow: 0 6px 24px rgba(15, 12, 50, .55); }
.pay .price-main { font-size: 28px; }
.pay .fine .ic { flex: none; margin-top: 2px; }

/* explanation */
.expl { margin-top: var(--s3); padding: var(--s3) var(--s4); border-radius: 14px; background: var(--accent-soft); color: var(--text);
  font-size: 15px; line-height: 1.55; border: 0; width: 100%; text-align: start; animation: enter .25s var(--ease); }
.expl-h { display: flex; align-items: center; gap: 6px; font-weight: 800; font-size: 13px; color: var(--warn); margin-bottom: 4px; }
.expl-f { display: flex; align-items: center; justify-content: space-between; gap: var(--s2); margin-top: 8px; font-size: 11.5px; color: var(--muted); }
.expl.locked { display: flex; align-items: center; gap: var(--s2); font-weight: 700; font-size: 14px; color: var(--warn); }
.linkbtn { border: 0; background: none; color: var(--muted); font-weight: 700; font-size: 12px; display: inline-flex; align-items: center; gap: 4px; padding: 4px 0; flex: none; }
.qmeta .iconbtn { width: 38px; height: 38px; }
/* report sheet */
.wrapchips { flex-wrap: wrap; margin-bottom: var(--s3); }
.input.ta { width: 100%; min-height: 90px; border-radius: 14px; border: 1.5px solid var(--line); background: var(--surface-2); padding: var(--s3); margin-bottom: var(--s4); resize: vertical; outline: none; }
.input.ta:focus { border-color: var(--primary); }
.sheet.paysheet { background: transparent; box-shadow: none; padding-top: 0; }
.sheet.paysheet .pay { margin: 0; }
/* zoom */
.zoom { position: fixed; inset: 0; z-index: 80; background: rgba(5, 6, 20, .92); display: grid; place-items: center; padding: var(--s4); animation: fade .2s; }
.zoom img { max-width: 100%; max-height: 86dvh; border-radius: 12px; background: #fff; }
.zoom .iconbtn { position: absolute; top: calc(var(--s4) + env(safe-area-inset-top)); inset-inline-end: var(--s4); background: rgba(255,255,255,.14); color: #fff; }
img[data-zoom] { cursor: zoom-in; }
/* sign board */
.signgrid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s3); margin: var(--s3) 0 var(--s5); }
.signcard { background: var(--surface); border-radius: var(--r); padding: var(--s3); box-shadow: var(--shadow-1); border: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
  display: flex; flex-direction: column; gap: var(--s2); font-size: 13.5px; font-weight: 600; line-height: 1.4; }
.signcard img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: #fff; border-radius: 10px; padding: 4px; }
@media (min-width: 520px) { .signgrid { grid-template-columns: repeat(3, 1fr); } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* license */
.lic-chip { margin-top: 8px; border: 0; border-radius: var(--r-pill); padding: 4px 10px; font-size: 12.5px; font-weight: 600;
  background: rgba(255,255,255,.14); color: #fff; }
.lics { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s2); }
.lics button { display: flex; flex-direction: column; gap: 2px; text-align: start; padding: 10px 12px; border-radius: 12px;
  border: 1.5px solid var(--line); background: var(--surface); }
.lics button b { font-size: 14px; font-weight: 700; }
.lics button span { font-size: 12px; color: var(--muted); }
.lics button.on { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-ink); }