@font-face{font-family:"Geist";src:url(/assets/fonts/geist.woff2) format("woff2");font-style:normal;font-weight:100 900;font-display:swap}
@font-face{font-family:"Newsreader";src:url(/assets/fonts/newsreader.woff2) format("woff2");font-style:normal;font-weight:200 800;font-display:swap}
@font-face{font-family:"Newsreader";src:url(/assets/fonts/newsreader-italic.woff2) format("woff2");font-style:italic;font-weight:200 800;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(/assets/fonts/jetbrains-mono.woff2) format("woff2");font-style:normal;font-weight:100 800;font-display:swap}
/* Layout: glass top nav + hero + set grid on home; during a test, a sticky glass bar with section, progress and timer; question left, answers right on wide screens. */
:root {
  --bg: #e9f5ef; --bg-a: #c9f0dc; --bg-b: #d7f3f0; --bg-c: #f1f8d8;
  --surface: #ffffff; --surface-2: #f4faf7;
  --glass: rgba(255, 255, 255, .58); --glass-strong: rgba(255, 255, 255, .84);
  --glass-border: rgba(255, 255, 255, .85); --glass-edge: rgba(8, 72, 48, .09);
  --fg: #0b1f17; --muted: #4a675a; --line: rgba(10, 70, 46, .13);
  --accent: #0d9668; --accent-2: #34d399; --accent-deep: #046c4e; --accent-fg: #ffffff; --accent-soft: rgba(16, 185, 129, .14);
  --grad: linear-gradient(135deg, #3ddc9f 0%, #12b981 48%, #05875f 100%);
  --grad-text: linear-gradient(120deg, #047857 0%, #10b981 55%, #0ea5a0 100%);
  --good: #0f8a4f; --good-soft: rgba(16, 163, 92, .13); --bad: #c0362c; --bad-soft: rgba(220, 60, 50, .11); --warn: #a35f00; --warn-soft: rgba(230, 150, 20, .14);
  --s1: #0e9f6e; --s2: #3b7ddd; --s3: #e8890c; --s4: #8b5cf6;
  --sh-sm: 0 1px 2px rgba(6, 50, 34, .06), 0 2px 8px rgba(6, 50, 34, .05);
  --sh: 0 2px 6px rgba(6, 50, 34, .05), 0 12px 32px -8px rgba(6, 50, 34, .14);
  --sh-lg: 0 4px 12px rgba(6, 50, 34, .06), 0 28px 60px -16px rgba(6, 50, 34, .22);
  --sh-btn: 0 1px 0 rgba(255, 255, 255, .45) inset, 0 -1px 0 rgba(0, 0, 0, .08) inset, 0 6px 16px -4px rgba(5, 120, 80, .45), 0 2px 4px rgba(5, 120, 80, .2);
  --hi: inset 0 1px 0 rgba(255, 255, 255, .9);
  --r: 20px; --r-sm: 14px;
  --font-body: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-display: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "SFMono-Regular", Menlo, monospace;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #04120d; --bg-a: #073a28; --bg-b: #06302f; --bg-c: #1b2e0c;
  --surface: #0d2219; --surface-2: #10291f;
  --glass: rgba(17, 44, 33, .55); --glass-strong: rgba(14, 38, 28, .86);
  --glass-border: rgba(255, 255, 255, .10); --glass-edge: rgba(0, 0, 0, .35);
  --fg: #e7f6ee; --muted: #98b8a9; --line: rgba(255, 255, 255, .10);
  --accent: #34d399; --accent-2: #6ee7b7; --accent-deep: #a7f3d0; --accent-fg: #03170f; --accent-soft: rgba(52, 211, 153, .16);
  --grad: linear-gradient(135deg, #6ee7b7 0%, #34d399 45%, #0fae7a 100%);
  --grad-text: linear-gradient(120deg, #a7f3d0 0%, #34d399 55%, #5eead4 100%);
  --good: #4ade80; --good-soft: rgba(74, 222, 128, .14); --bad: #f87171; --bad-soft: rgba(248, 113, 113, .14); --warn: #fbbf24; --warn-soft: rgba(251, 191, 36, .14);
  --s1: #34d399; --s2: #60a5fa; --s3: #fbbf24; --s4: #c4b5fd;
  --sh-sm: 0 1px 2px rgba(0, 0, 0, .3); --sh: 0 12px 32px -10px rgba(0, 0, 0, .55); --sh-lg: 0 28px 60px -18px rgba(0, 0, 0, .7);
  --sh-btn: 0 1px 0 rgba(255, 255, 255, .35) inset, 0 8px 22px -6px rgba(52, 211, 153, .45);
  --hi: inset 0 1px 0 rgba(255, 255, 255, .08);
  color-scheme: dark; } }
:root[data-theme="dark"] {
  --bg: #04120d; --bg-a: #073a28; --bg-b: #06302f; --bg-c: #1b2e0c;
  --surface: #0d2219; --surface-2: #10291f;
  --glass: rgba(17, 44, 33, .55); --glass-strong: rgba(14, 38, 28, .86);
  --glass-border: rgba(255, 255, 255, .10); --glass-edge: rgba(0, 0, 0, .35);
  --fg: #e7f6ee; --muted: #98b8a9; --line: rgba(255, 255, 255, .10);
  --accent: #34d399; --accent-2: #6ee7b7; --accent-deep: #a7f3d0; --accent-fg: #03170f; --accent-soft: rgba(52, 211, 153, .16);
  --grad: linear-gradient(135deg, #6ee7b7 0%, #34d399 45%, #0fae7a 100%);
  --grad-text: linear-gradient(120deg, #a7f3d0 0%, #34d399 55%, #5eead4 100%);
  --good: #4ade80; --good-soft: rgba(74, 222, 128, .14); --bad: #f87171; --bad-soft: rgba(248, 113, 113, .14); --warn: #fbbf24; --warn-soft: rgba(251, 191, 36, .14);
  --s1: #34d399; --s2: #60a5fa; --s3: #fbbf24; --s4: #c4b5fd;
  --sh-sm: 0 1px 2px rgba(0, 0, 0, .3); --sh: 0 12px 32px -10px rgba(0, 0, 0, .55); --sh-lg: 0 28px 60px -18px rgba(0, 0, 0, .7);
  --sh-btn: 0 1px 0 rgba(255, 255, 255, .35) inset, 0 8px 22px -6px rgba(52, 211, 153, .45);
  --hi: inset 0 1px 0 rgba(255, 255, 255, .08);
  color-scheme: dark; }

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--font-body); font-size: 16px; line-height: 1.5; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
/* Ambient mesh gradient behind the glass */
.ambient { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none;
  background: radial-gradient(60vw 50vh at 8% 0%, var(--bg-a), transparent 70%), radial-gradient(55vw 55vh at 100% 20%, var(--bg-b), transparent 70%), radial-gradient(70vw 50vh at 50% 110%, var(--bg-c), transparent 70%), var(--bg); }
.ambient i { position: absolute; border-radius: 50%; filter: blur(60px); opacity: .55; }
.ambient i:nth-child(1) { width: 420px; height: 420px; left: -120px; top: 30vh; background: #5eead4; opacity: .28; }
.ambient i:nth-child(2) { width: 520px; height: 520px; right: -160px; top: -120px; background: #34d399; opacity: .30; }
.ambient i:nth-child(3) { width: 360px; height: 360px; right: 15vw; bottom: -140px; background: #bef264; opacity: .22; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3 { text-wrap: balance; line-height: 1.2; margin: 0; font-family: var(--font-display); letter-spacing: -.015em; }
p { margin: 0; }
.wrap { max-width: 1140px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.num { font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.eyebrow { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); font-weight: 650; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.scroll-x { overflow-x: auto; }
.grad-text { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Glass surfaces */
.glass { background: var(--glass); border: 1px solid var(--glass-border); box-shadow: var(--hi), var(--sh); -webkit-backdrop-filter: blur(22px) saturate(170%); backdrop-filter: blur(22px) saturate(170%); border-radius: var(--r); }
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) { .glass { background: var(--glass-strong); } }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--glass-border); background: var(--glass-strong); box-shadow: var(--hi), var(--sh-sm); border-radius: 14px; padding: 10px 18px; font-weight: 600; font-size: 15px; transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s; text-decoration: none; color: var(--fg); }
.btn:hover { border-color: var(--accent-2); box-shadow: var(--hi), 0 6px 18px -6px rgba(5, 120, 80, .28); transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(.98); }
.btn-primary { background: var(--grad) border-box; color: var(--accent-fg); border-color: transparent; box-shadow: var(--sh-btn); text-shadow: 0 1px 1px rgba(0, 0, 0, .12); }
:root[data-theme="dark"] .btn-primary { text-shadow: none; }
.btn-primary:hover { filter: brightness(1.05) saturate(1.05); border-color: transparent; box-shadow: var(--sh-btn), 0 12px 26px -10px rgba(5, 120, 80, .55); }
.btn-ghost { background: transparent; border-color: transparent; box-shadow: none; color: var(--muted); }
.btn-ghost:hover { background: var(--accent-soft); color: var(--fg); box-shadow: none; border-color: transparent; }
.btn-lg { padding: 14px 26px; font-size: 16px; border-radius: 16px; }
.btn-sm { padding: 6px 12px; font-size: 14px; border-radius: 11px; }
.btn .ico { width: 18px; height: 18px; flex: none; }

/* Top navigation */
.topbar { position: sticky; top: 0; z-index: 20; padding-top: max(10px, env(safe-area-inset-top, 0px)); padding-bottom: 6px; }
.nav { display: flex; align-items: center; gap: 8px; padding: 8px 8px 8px 14px; border-radius: 22px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 750; font-size: 18px; letter-spacing: -.02em; text-decoration: none; color: var(--fg); margin-right: auto; font-family: var(--font-display); }
.brand svg { width: 30px; height: 30px; flex: none; filter: drop-shadow(0 3px 6px rgba(5, 120, 80, .35)); }
.navlinks { display: flex; gap: 2px; padding: 3px; border-radius: 14px; background: var(--accent-soft); }
.navlinks a { padding: 7px 14px; border-radius: 11px; text-decoration: none; color: var(--muted); font-weight: 600; font-size: 14px; white-space: nowrap; transition: background .15s, color .15s; }
.navlinks a:hover { color: var(--fg); }
.navlinks a[aria-current="page"] { background: var(--glass-strong); color: var(--fg); box-shadow: var(--hi), var(--sh-sm); }
.iconbtn { width: 40px; height: 40px; padding: 0; border-radius: 13px; flex: none; }
.menu-toggle { display: none; }
@media (max-width: 760px) {
  .menu-toggle { display: inline-flex; }
  .navlinks { display: none; position: absolute; left: max(16px, env(safe-area-inset-left, 0px)); right: max(16px, env(safe-area-inset-right, 0px)); top: calc(100% + 2px); flex-direction: column; padding: 8px; border-radius: 18px; background: var(--glass-strong); border: 1px solid var(--glass-border); box-shadow: var(--sh-lg); -webkit-backdrop-filter: blur(22px) saturate(170%); backdrop-filter: blur(22px) saturate(170%); }
  .navlinks.open { display: flex; }
  .navlinks a { padding: 12px 14px; font-size: 16px; }
  .kofi-label { display: none; }
}

/* Home */
.hero { padding-block: 40px 28px; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 32px; align-items: center; }
@media (max-width: 860px) { .hero { grid-template-columns: minmax(0, 1fr); padding-top: 24px; } }
.hero h1 { font-size: clamp(38px, 5.6vw, 62px); font-weight: 700; letter-spacing: -.04em; line-height: 1.02; }
.hero h1 .serif { display: block; font-family: var(--font-serif); font-style: italic; font-weight: 450; letter-spacing: -.02em; line-height: 1.08; padding-bottom: .06em; }
.hero .lead { font-family: var(--font-serif); font-size: clamp(19px, 1.9vw, 22px); line-height: 1.45; color: var(--muted); max-width: 40ch; margin-top: 18px; }
.hero .cta { margin-top: 28px; }
.hero .fineprint { margin-top: 14px; font-size: 13.5px; color: var(--muted); display: flex; gap: 14px; flex-wrap: wrap; }
.hero .fineprint span { display: inline-flex; align-items: center; gap: 6px; }
.hero .fineprint svg { width: 15px; height: 15px; color: var(--accent); }
.hero-card { padding: 22px; display: grid; gap: 16px; position: relative; overflow: hidden; }
.hero-card::after { content: ""; position: absolute; inset: -40% -30% auto auto; width: 70%; height: 90%; background: radial-gradient(closest-side, rgba(52, 211, 153, .35), transparent); pointer-events: none; }
.hero-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.stat { padding: 14px 12px; border-radius: 16px; background: var(--glass-strong); border: 1px solid var(--glass-border); box-shadow: var(--hi), var(--sh-sm); display: grid; gap: 2px; min-width: 0; }
.stat b { font-size: 26px; font-weight: 750; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.stat span { font-size: 12.5px; color: var(--muted); }
.sections-list { display: grid; gap: 8px; }
.secrow { color: inherit; text-decoration: none; transition: border-color .15s, transform .15s; }
.secrow:hover { border-color: var(--accent-2); transform: translateX(2px); }
.secrow { display: grid; grid-template-columns: 36px 1fr auto; gap: 12px; align-items: center; padding: 10px 12px; border-radius: 14px; background: var(--glass-strong); border: 1px solid var(--glass-border); }
.secrow .k { width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; font-weight: 750; font-size: 12px; color: var(--accent-fg); background: var(--grad); box-shadow: var(--sh-btn); }
.secrow small { color: var(--muted); }

.toolbar { display: flex; justify-content: space-between; align-items: end; gap: 12px; flex-wrap: wrap; margin: 16px 0 14px; }
.toolbar h2 { font-size: 24px; }
.seg { display: inline-flex; padding: 3px; border-radius: 13px; background: var(--accent-soft); border: 1px solid var(--glass-border); gap: 2px; flex-wrap: wrap; }
.seg button { border: 0; background: transparent; padding: 7px 14px; border-radius: 10px; font-size: 14px; font-weight: 600; color: var(--muted); }
.seg button[aria-pressed="true"] { background: var(--glass-strong); color: var(--fg); box-shadow: var(--hi), var(--sh-sm); }
.sets { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
@media (max-width: 400px) { .sets { grid-template-columns: minmax(0, 1fr); } }
.set { padding: 18px; display: grid; gap: 14px; align-content: start; transition: transform .2s ease, box-shadow .2s ease; }
.set:hover { transform: translateY(-2px); box-shadow: var(--hi), var(--sh-lg); }
.set-head { display: flex; justify-content: space-between; align-items: start; gap: 10px; }
.set h3 { font-size: 20px; font-weight: 700; }
.set .note { font-size: 14px; color: var(--muted); margin-top: 4px; }
.set .meta { font-size: 13.5px; color: var(--muted); margin-top: 3px; font-variant-numeric: tabular-nums; }
.set .split { display: grid; grid-template-columns: repeat(auto-fit, minmax(72px, 1fr)); gap: 6px; }
.set .split-lbl { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.set .split .btn { justify-content: center; }
.set .split .btn.is-done { color: var(--good); }
.set-done { opacity: .82; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font-size: 12px; font-weight: 650; padding: 3px 9px; border-radius: 999px; background: var(--glass-strong); border: 1px solid var(--line); color: var(--muted); font-variant-numeric: tabular-nums; }
.chip-done { background: var(--good-soft); color: var(--good); border-color: transparent; }
.lvl { font-size: 11.5px; font-weight: 750; letter-spacing: .04em; text-transform: uppercase; padding: 4px 9px; border-radius: 999px; white-space: nowrap; }
.lvl-realistic { background: var(--accent-soft); color: var(--accent-deep); }
.lvl-challenging { background: var(--warn-soft); color: var(--warn); }
.lvl-own { background: rgba(59, 125, 221, .14); color: var(--s2); }
.set .actions { display: grid; gap: 8px; }
.set .actions .btn { justify-content: flex-start; text-align: left; }
.set .actions .btn span:last-child { margin-left: auto; }
.set .actions .btn span:first-child { white-space: nowrap; }
.set .actions .btn span:last-child { font-weight: 500; font-size: 13px; opacity: .85; text-align: right; }
.set-foot { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 10px; margin-top: 2px; }

.how { margin-block: 56px 8px; }
.how > h2 { font-size: 24px; margin-bottom: 14px; }
.how .steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); padding: 6px; }
.how .step { padding: 18px 20px; display: grid; gap: 6px; align-content: start; }
.how .step + .step { border-left: 1px solid var(--line); }
@media (max-width: 800px) { .how .step + .step { border-left: 0; border-top: 1px solid var(--line); } }
.how .n { font-family: var(--font-mono); font-size: 12.5px; color: var(--accent); font-weight: 600; }
.how h3 { font-size: 17px; }
.mission { margin-block: 20px 8px; padding: clamp(24px, 4vw, 40px); display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 40px; align-items: end; position: relative; overflow: hidden; }
.mission::after { content: ""; position: absolute; inset: auto -10% -60% auto; width: 50%; height: 120%; background: radial-gradient(closest-side, rgba(52, 211, 153, .28), transparent); pointer-events: none; }
@media (max-width: 760px) { .mission { grid-template-columns: minmax(0, 1fr); align-items: start; } }
.mission > div:first-child { display: grid; gap: 12px; max-width: 60ch; }
.mission h2 { font-family: var(--font-serif); font-weight: 450; font-size: clamp(26px, 3.4vw, 38px); letter-spacing: -.02em; line-height: 1.12; }
.mission p { font-size: 16px; }
.byline { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--muted); }
.byline a { color: var(--fg); font-weight: 600; text-decoration: none; }
.byline a:hover { text-decoration: underline; }
.avatar { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; flex: none; font-size: 13px; font-weight: 700; color: var(--accent-fg); background: var(--grad); box-shadow: var(--sh-btn); }
.avatar-lg { width: 56px; height: 56px; font-size: 19px; }
.panel { padding: 22px; display: grid; gap: 14px; }
.panel h2 { font-size: 20px; }
.page > header .sub { font-family: var(--font-serif); font-size: clamp(19px, 2vw, 22px); color: var(--muted); max-width: 46ch; margin-top: 10px; line-height: 1.4; }
/* About reads as one editorial page: serif throughout, sans only for buttons */
.about, .about h1, .about h2, .about h3 { font-family: var(--font-serif); }
.about .btn { font-family: var(--font-body); }
.about > header h1 { font-weight: 600; letter-spacing: -.02em; font-size: clamp(34px, 4.6vw, 48px); }
.about .panel { max-width: 760px; }
.about .panel h2 { font-weight: 600; font-size: 25px; letter-spacing: -.01em; margin-top: 14px; }
.about .panel h2:first-child { margin-top: 0; }
.about p, .about li { font-size: 19px; line-height: 1.6; }
.about .author b { font-size: 19px; }
.about .author div span { font-size: 16px; }
.about .avatar { font-family: var(--font-serif); font-size: 22px; font-weight: 600; }
.story { max-width: 760px; }
.story p { font-family: var(--font-serif); font-size: 19px; line-height: 1.6; }
.story h2 { margin-top: 10px; }
.story blockquote { margin: 4px 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--accent); font-family: var(--font-serif); font-style: italic; font-size: 23px; line-height: 1.4; color: var(--fg); }
.author { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 16px; border-radius: var(--r-sm); background: var(--glass-strong); border: 1px solid var(--glass-border); box-shadow: var(--hi), var(--sh-sm); }
.author div { flex: 1 1 200px; }
.author b { display: block; font-size: 16px; }
.author div span { font-size: 14px; color: var(--muted); }
.panel + .panel { margin-top: 16px; }
.page { padding-block: 28px 64px; display: grid; gap: 18px; }
.page > header h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: -.03em; }
.prose { display: grid; gap: 12px; max-width: 72ch; }
.prose h2 { font-size: 19px; margin-top: 10px; }
.prose ul { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.hist { width: 100%; border-collapse: collapse; font-size: 14px; }
.hist td, .hist th { padding: 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.hist th { font-size: 12px; color: var(--muted); font-weight: 650; letter-spacing: .04em; text-transform: uppercase; }
.empty { padding: 28px; text-align: center; color: var(--muted); display: grid; gap: 12px; justify-items: center; }

/* Footer */
.site-foot { padding-block: 28px calc(28px + env(safe-area-inset-bottom, 0px)); margin-top: 24px; }
.foot-grid { padding: 26px; display: grid; grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr)); gap: 24px; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .foot-brand { grid-column: 1 / -1; } }
.foot-brand { display: grid; gap: 10px; align-content: start; }
.foot-brand .brand { margin: 0; font-size: 16px; }
.foot-brand .brand svg { width: 26px; height: 26px; }
.site-foot p { font-size: 13px; color: var(--muted); max-width: 46ch; }
.site-foot nav { display: grid; gap: 8px; align-content: start; font-size: 14px; }
.site-foot h4 { margin: 0 0 2px; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); font-weight: 650; }
.site-foot nav a { color: var(--fg); text-decoration: none; }
.site-foot nav a:hover { color: var(--accent); }

/* Test bar */
.bar { position: sticky; top: 0; z-index: 20; padding-top: max(10px, env(safe-area-inset-top, 0px)); }
.bar-in { display: grid; grid-template-columns: auto 1fr auto; gap: 8px 14px; align-items: center; padding: 12px 16px; border-radius: 20px; }
.bar-title { font-weight: 700; min-width: 0; }
.bar-sub { font-size: 13px; color: var(--muted); }
.timer { font-family: var(--font-mono); font-size: 22px; font-weight: 600; padding: 6px 14px; border-radius: 13px; background: var(--glass-strong); border: 1px solid var(--glass-border); box-shadow: var(--hi), var(--sh-sm); font-variant-numeric: tabular-nums; }
.timer.low { color: var(--bad); background: var(--bad-soft); border-color: transparent; animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px var(--bad-soft); } }
.progress { grid-column: 1 / -1; height: 6px; background: var(--accent-soft); border-radius: 99px; overflow: hidden; }
.progress > div { height: 100%; background: var(--grad); border-radius: 99px; transition: width .3s ease; box-shadow: 0 0 12px rgba(52, 211, 153, .6); }

/* Question */
.qwrap { padding-block: 18px 130px; }
.qgrid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 860px) { .qgrid { grid-template-columns: minmax(0, 1fr); } }
.qbox { padding: 22px; display: grid; gap: 14px; min-width: 0; }
.qnum { font-size: 13px; color: var(--accent-deep); font-weight: 700; letter-spacing: .02em; }
.md { display: grid; gap: 10px; min-width: 0; }
.md table { border-collapse: separate; border-spacing: 0; font-size: 14px; font-variant-numeric: tabular-nums; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.md th, .md td { border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); padding: 7px 10px; text-align: left; white-space: nowrap; }
.md tr > :last-child { border-right: 0; }
.md tbody tr:last-child td { border-bottom: 0; }
.md th { white-space: normal; min-width: 4.5em; vertical-align: bottom; background: var(--accent-soft); font-weight: 650; }
.md ul { margin: 0; padding-left: 20px; }
.md code { font-family: var(--font-mono); font-size: .9em; }
.stem { font-size: 17px; }
.ctx { padding-bottom: 14px; border-bottom: 1px dashed var(--line); }
.answers { display: grid; gap: 10px; }
.hint { font-size: 13px; color: var(--muted); }
.opt { display: grid; grid-template-columns: 30px 1fr; gap: 12px; align-items: start; text-align: left; background: var(--glass); border: 1px solid var(--glass-border); border-radius: 16px; padding: 14px 16px; width: 100%; box-shadow: var(--hi), var(--sh-sm); -webkit-backdrop-filter: blur(18px) saturate(160%); backdrop-filter: blur(18px) saturate(160%); transition: transform .12s ease, border-color .15s, background .15s, box-shadow .15s; }
.opt:hover { border-color: var(--accent-2); transform: translateY(-1px); }
.opt:active { transform: scale(.99); }
.opt .mark { width: 26px; height: 26px; margin-top: -1px; border: 1.5px solid var(--line); background: var(--glass-strong); border-radius: 50%; display: grid; place-items: center; font-size: 12px; font-weight: 750; color: var(--muted); transition: all .15s; }
.opt.multi .mark { border-radius: 8px; }
.opt[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); box-shadow: var(--hi), 0 0 0 3px var(--accent-soft), var(--sh-sm); }
.opt[aria-pressed="true"] .mark { background: linear-gradient(135deg, #10b981, #046c4e); border-color: transparent; color: #fff; box-shadow: var(--sh-btn); }
.foot { position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; padding-bottom: max(10px, env(safe-area-inset-bottom, 0px)); pointer-events: none; }
.foot-in { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 10px 10px 18px; border-radius: 20px; pointer-events: auto; }
.foot .btn-primary { margin-left: auto; min-width: 160px; }

/* Chart */
.chart { display: grid; gap: 6px; min-width: 0; padding: 12px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.chart-title { font-weight: 650; font-size: 14px; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; color: var(--muted); }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 4px; margin-right: 6px; vertical-align: -1px; }
.chart .svgbox { overflow-x: auto; }
.chart svg { width: 100%; height: auto; max-width: 640px; min-width: 500px; display: block; }
.chart svg text { fill: var(--muted); font-family: var(--font-body); font-size: 12px; }
.chart svg text.val { fill: var(--fg); font-weight: 650; font-variant-numeric: tabular-nums; }
.chart-note { font-size: 13px; color: var(--fg); }

/* Interstitial */
.center { padding-block: 36px 80px; }
.center .glass { padding: 28px; display: grid; justify-items: start; gap: 18px; max-width: 700px; }
.center h1 { font-size: clamp(26px, 4vw, 34px); font-weight: 800; letter-spacing: -.03em; }
.facts { display: flex; gap: 10px; flex-wrap: wrap; }
.fact { background: var(--glass-strong); border: 1px solid var(--glass-border); box-shadow: var(--hi), var(--sh-sm); border-radius: 16px; padding: 12px 16px; min-width: 120px; }
.fact b { display: block; font-size: 24px; font-family: var(--font-mono); font-weight: 600; }
.rules { margin: 0; padding-left: 20px; display: grid; gap: 6px; }

/* Results */
.res { padding-block: 24px 80px; display: grid; gap: 22px; }
.res-hero { padding: 24px; display: grid; gap: 10px; }
.res-hero h1 { font-size: clamp(36px, 6vw, 54px); font-weight: 800; letter-spacing: -.03em; }
.scores { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.score { padding: 18px; display: grid; gap: 8px; color: inherit; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease; }
.score:hover { transform: translateY(-2px); box-shadow: var(--hi), var(--sh-lg); }
.score .jump { color: var(--accent); font-weight: 600; }
.review { display: grid; gap: 8px; scroll-margin-top: 20px; }
.score .big { font-family: var(--font-mono); font-size: 32px; font-weight: 600; }
.meter { height: 8px; border-radius: 99px; background: var(--accent-soft); overflow: hidden; position: relative; }
.meter > div { height: 100%; border-radius: 99px; background: var(--grad); }
.meter.ko > div { background: linear-gradient(90deg, #f59e0b, #ef4444); }
.meter::after { content: ""; position: absolute; top: -2px; bottom: -2px; left: 80%; width: 2px; background: var(--fg); opacity: .35; }
.pill { display: inline-block; font-size: 12px; font-weight: 650; padding: 3px 9px; border-radius: 999px; }
.pill.ok { background: var(--good-soft); color: var(--good); }
.pill.ko { background: var(--bad-soft); color: var(--bad); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.revq { border-radius: 16px; }
.revq > summary { list-style: none; cursor: pointer; display: grid; grid-template-columns: 36px 1fr auto; gap: 12px; align-items: center; padding: 12px 14px; }
.revq > summary::-webkit-details-marker { display: none; }
.revq .tick { font-weight: 750; text-align: center; border-radius: 10px; padding: 4px 0; }
.revq .tick.ok { color: var(--good); background: var(--good-soft); }
.revq .tick.ko { color: var(--bad); background: var(--bad-soft); }
.revq .body { padding: 0 14px 16px; display: grid; gap: 12px; }
.revopt { display: grid; grid-template-columns: 22px 1fr auto; gap: 10px; padding: 8px 12px; border-radius: 12px; font-size: 14px; }
.revopt.correct { background: var(--good-soft); }
.revopt.wrong { background: var(--bad-soft); }
.explain { border-left: 3px solid var(--accent); padding: 6px 0 6px 12px; font-size: 15px; }
.reg { font-family: var(--font-mono); font-size: 13px; background: var(--glass-strong); border: 1px solid var(--glass-border); border-radius: 12px; padding: 10px 12px; overflow-x: auto; white-space: nowrap; }
textarea { width: 100%; min-height: 220px; background: var(--glass-strong); border: 1px solid var(--glass-border); box-shadow: inset 0 1px 3px rgba(0, 0, 0, .06); border-radius: 14px; padding: 12px; font-family: var(--font-mono); font-size: 13px; }
.msg-ok { color: var(--good); font-size: 14px; }
.msg-err { color: var(--bad); font-size: 14px; white-space: pre-wrap; }
.fade-in { animation: fade .28s ease both; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }

/* Scroll reveal: elements rise and sharpen into place as they enter the viewport */
.reveal { opacity: 0; transform: translateY(28px) scale(.985); filter: blur(6px); transition: opacity .8s cubic-bezier(.2, .7, .2, 1), transform .9s cubic-bezier(.2, .7, .2, 1), filter .8s ease; transition-delay: var(--d, 0s); will-change: opacity, transform; }
.reveal.in { opacity: 1; transform: none; filter: none; }
.hero .reveal { transform: translateY(18px); }
.ambient i { translate: 0 clamp(-180px, calc(var(--sy, 0) * var(--k, -.12) * 1px), 180px); }
.ambient i:nth-child(2) { --k: -.22; }
.ambient i:nth-child(3) { --k: .08; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  .ambient i { translate: none; }
}

/* Sub-pages: breadcrumbs, topic and mock test pages */
@media (max-width: 1140px) { .kofi-label { display: none; } .kofi { padding-inline: 10px; } }
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 14px; color: var(--muted); margin: 18px 0 4px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--fg); text-decoration: underline; }
.crumbs [aria-current] { color: var(--fg); font-weight: 600; }
.center > .crumbs { margin: 0 0 14px; }
.page > header .cta { margin-top: 22px; }
.page > .glass + .glass, .topic-grid + .glass, .page > .glass + nav { margin-top: 16px; }
.topic-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 16px; margin-top: 8px; }
@media (max-width: 860px) { .topic-grid { grid-template-columns: minmax(0, 1fr); } }
.topic-grid + .glass { margin-top: 16px; }
.setlist { display: grid; gap: 8px; }
.setrow { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 14px; background: var(--glass-strong); border: 1px solid var(--glass-border); }
.setrow > div { display: grid; gap: 2px; min-width: 0; }
.setrow a { color: var(--fg); text-decoration: none; }
.setrow a:hover { color: var(--accent); }
.setrow .pill { display: inline-flex; align-items: center; gap: 4px; }
.setrow .pill .ico, .pill .ico { width: 13px; height: 13px; }
.set h3 a { color: inherit; text-decoration: none; }
.set h3 a:hover { color: var(--accent); }
.sample { display: grid; gap: 14px; }
.sample-opts { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.sample-opts li { display: flex; gap: 10px; align-items: center; padding: 9px 12px; border-radius: 12px; background: var(--glass-strong); border: 1px solid var(--glass-border); }
.sample-opts .mark { width: 26px; height: 26px; flex: none; border-radius: 8px; display: grid; place-items: center; font-size: 12px; font-weight: 700; background: var(--accent-soft); color: var(--accent-deep); }
.reveal-ans summary, .faq summary { cursor: pointer; font-weight: 600; color: var(--accent); }
.reveal-ans[open] summary { margin-bottom: 8px; }
.faq details { border-top: 1px solid var(--line); padding: 12px 0 2px; }
.faq summary { color: var(--fg); }
.faq details p { margin-top: 8px; color: var(--muted); }
.tips { margin: 0; padding-left: 22px; display: grid; gap: 8px; }
.pager { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 16px; }
.steps-ind { list-style: none; margin: 0; padding: 0; display: flex; gap: 8px; flex-wrap: wrap; }
.steps-ind li { display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px 5px 5px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--muted); background: var(--glass-strong); border: 1px solid var(--glass-border); }
.steps-ind li span { width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-size: 12px; background: var(--accent-soft); color: var(--accent-deep); }
.steps-ind li span .ico { width: 13px; height: 13px; }
.steps-ind li.now { color: var(--fg); border-color: var(--accent-2); }
.steps-ind li.now span { background: var(--grad); color: var(--accent-fg); }
.steps-ind li.done span { background: var(--good-soft); color: var(--good); }
.exit { width: 36px; height: 36px; border-radius: 11px; }
.topic-grid { align-items: start; }
.prose { align-content: start; }
.topic .panel.prose, .setpage .panel.prose { max-width: none; }
.topic .panel.prose p, .topic .panel.prose li { max-width: 72ch; }