/* iCode marketing site — docs/specs/marketing-site-design.md. Geist (SIL OFL) self-hosted from fonts/. */
/* Geist cyrillic-ext */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(fonts/geist-cyrillic-ext.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* Geist cyrillic */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(fonts/geist-cyrillic.woff2) format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* Geist latin */
@font-face {
  font-family: 'Geist';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(fonts/geist-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Geist Mono cyrillic-ext */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(fonts/geist-mono-cyrillic-ext.woff2) format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
/* Geist Mono cyrillic */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(fonts/geist-mono-cyrillic.woff2) format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
/* Geist Mono latin */
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(fonts/geist-mono-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --bg: #fcfbf9;
  --panel: #ffffff;
  --soft: #f5f3f0;
  --ink: #172033;
  --copy: rgba(23, 32, 51, 0.72);
  --muted: #667085;
  --line: rgba(23, 32, 51, 0.09);
  --line-strong: rgba(23, 32, 51, 0.16);
  --accent: #e86b02;
  --accent-ink: #172033;
  --accent-text: #b85300;
  --accent-soft: rgba(232, 107, 2, 0.10);
  --glow-a: rgba(255, 177, 92, 0.30);
  --glow-b: rgba(232, 107, 2, 0.14);
  --btn-dark: #172033;
  --btn-dark-fg: #ffffff;
  --dot: rgba(23, 32, 51, 0.10);
  --font-sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, Menlo, monospace;
  --radius: 8px;
  --max: 1120px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 16px/1.6 var(--font-sans); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.wrap { max-width: var(--max); margin: 0 auto; padding-inline: clamp(16px, 4vw, 40px); }
.mono { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.02em; color: var(--muted); }
.nowrap { white-space: nowrap; }

/* header */
header.site { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
header.site .wrap { height: 56px; display: flex; align-items: center; gap: 24px; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
.logo img { display: block; height: 26px; width: auto; }
nav.main { margin-left: auto; display: flex; align-items: center; gap: 22px; font-size: 14px; color: var(--muted); }
nav.main a:hover { color: var(--ink); }
.nav-menu { position: relative; }
.nav-drop { display: none; position: absolute; top: 100%; left: -14px; min-width: 260px; padding: 8px; margin-top: 8px; border: 1px solid var(--line-strong); border-radius: 12px; background: var(--panel); }
.nav-drop::before { content: ""; position: absolute; inset: -10px 0 auto; height: 10px; }
.nav-drop a { display: block; padding: 8px 10px; border-radius: 6px; color: var(--ink); }
.nav-drop a:hover { background: var(--soft); }
.nav-menu:hover .nav-drop, .nav-menu:focus-within .nav-drop { display: block; }
.menu-mobile { display: none; }
.menu-mobile summary { list-style: none; cursor: pointer; }
.menu-mobile summary::-webkit-details-marker { display: none; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; height: 40px; padding: 0 18px; border-radius: var(--radius); font: 500 14px/1 var(--font-sans); border: 1px solid transparent; cursor: pointer; white-space: nowrap; }
.btn-sm { height: 34px; padding: 0 14px; font-size: 13.5px; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); }
.btn-dark { background: var(--btn-dark); color: var(--btn-dark-fg); }
.btn-ghost { background: var(--panel); border-color: var(--line-strong); color: var(--ink); }
.btn-ghost:hover { background: var(--soft); }
.text-link { font-size: 13.5px; font-weight: 500; color: var(--accent-text); white-space: nowrap; }
.text-link:hover { text-decoration: underline; }

/* hero */
.icode-home-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.icode-home-hero::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(var(--dot) 1px, transparent 1px); background-size: 22px 22px; mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, #000 30%, transparent 75%); }
.icode-home-hero::after { content: ""; position: absolute; left: 50%; top: 42%; width: min(820px, 120vw); height: 360px; transform: translate(-50%, -50%); background: radial-gradient(closest-side at 35% 50%, var(--glow-a), transparent), radial-gradient(closest-side at 68% 55%, var(--glow-b), transparent); filter: blur(30px); }
.icode-home-hero .wrap { position: relative; z-index: 1; text-align: center; padding-block: clamp(64px, 11vw, 132px) clamp(48px, 7vw, 88px); }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 4px 12px 4px 6px; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--panel); font-size: 13px; color: var(--copy); }
.pill b { font: 500 11px/1 var(--font-mono); background: var(--accent-soft); color: var(--accent-text); padding: 4px 7px; border-radius: 999px; }
h1 { margin: 22px auto 0; max-width: 15em; font-size: clamp(34px, 5.4vw, 56px); line-height: 1.05; font-weight: 700; letter-spacing: -0.03em; text-wrap: balance; }
h1 .dim { color: var(--muted); }
.lede { margin: 20px auto 0; max-width: 36em; font-size: clamp(16px, 1.6vw, 17.5px); color: var(--copy); text-wrap: pretty; }
.actions { margin-top: 30px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.tracks { margin-top: 26px; display: flex; gap: 6px 14px; justify-content: center; flex-wrap: wrap; }
.tracks span + span::before { content: "·"; margin-right: 14px; color: var(--line-strong); }

/* sections */
section.block { padding-block: clamp(56px, 8vw, 104px); border-bottom: 1px solid var(--line); }
section.block.last { border-bottom: 0; }
.eyebrow { font: 400 12px/1 var(--font-mono); color: var(--muted); }
h2 { margin: 12px 0 0; font-size: clamp(28px, 3.6vw, 40px); line-height: 1.08; font-weight: 600; letter-spacing: -0.025em; text-wrap: balance; max-width: 18em; }
.section-lede { margin: 14px 0 0; max-width: 40em; color: var(--copy); }
.head { margin-bottom: 36px; }

/* courses: one dense row per course */
.panel { border: 1px solid var(--line-strong); border-radius: 12px; background: var(--panel); overflow: hidden; }
.panel + .panel { margin-top: 16px; }
.panel.empty { padding: 28px; }
.panel.empty h3 { margin: 0; font-size: 17px; font-weight: 600; }
.panel.empty p { margin: 6px 0 0; color: var(--muted); font-size: 14.5px; }
.icode-home-course-card { display: grid; grid-template-columns: minmax(0, 2.3fr) repeat(3, minmax(0, 1fr)) auto; gap: 20px; align-items: center; padding: 22px 24px; border-top: 1px solid var(--line); }
.icode-home-course-card:first-child { border-top: 0; }
.icode-home-course-card:hover { background: var(--soft); }
.icode-home-course-card h3 { margin: 0; font-size: 17px; font-weight: 600; letter-spacing: -0.01em; }
.icode-home-course-card h3 a:hover { color: var(--accent-text); }
.icode-home-course-card p { margin: 4px 0 0; font-size: 14px; color: var(--muted); line-height: 1.5; }
.fact { min-width: 0; }
.fact .mono { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; }
.fact strong { display: block; margin-top: 3px; font-size: 14.5px; font-weight: 500; font-variant-numeric: tabular-nums; }
.icode-home-course-card .go { display: flex; gap: 14px; align-items: center; }

/* numbers */
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stat { padding: 28px 28px 30px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; }
.stat .num { font-size: clamp(36px, 4vw, 46px); font-weight: 600; letter-spacing: -0.03em; line-height: 1; font-variant-numeric: tabular-nums; }
.stat .num small { font-size: 0.5em; color: var(--accent-text); margin-left: 2px; }
.stat h3 { margin: 14px 0 0; font-size: 16px; font-weight: 600; }
.points .stat { padding-block: 22px 24px; }
.points .stat h3 { margin-top: 0; }
.stat p { margin: 6px 0 0; font-size: 14px; color: var(--muted); line-height: 1.55; }

/* teachers */
.teachers { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.teacher { display: grid; grid-template-rows: auto 1fr; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); overflow: hidden; }
.photo { aspect-ratio: 4 / 5; background: var(--soft); border-bottom: 1px solid var(--line); display: grid; place-items: center; color: var(--muted); font: 500 28px/1 var(--font-mono); background-image: radial-gradient(var(--dot) 1px, transparent 1px); background-size: 14px 14px; overflow: hidden; }
.photo img { width: 100%; height: 100%; object-fit: cover; }
.teacher-body { padding: 16px 16px 18px; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.teacher h3 { margin: 0; font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.teacher .role { font-size: 13.5px; color: var(--accent-text); }
.teacher p { margin: 0; font-size: 14px; color: var(--copy); line-height: 1.55; }
.skills { display: flex; flex-wrap: wrap; gap: 4px 12px; font: 400 11.5px/1.6 var(--font-mono); color: var(--muted); }
.teaches { margin-top: auto; padding-top: 10px; border-top: 1px dashed var(--line); font-size: 13px; color: var(--muted); }
.teaches a { color: var(--ink); }
.teaches a:hover { color: var(--accent-text); }

/* faq */
.faq-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); gap: 48px; align-items: start; }
.faq-grid details { border-top: 1px solid var(--line); }
.faq-grid details:last-child { border-bottom: 1px solid var(--line); }
.faq-grid summary { list-style: none; cursor: pointer; padding: 18px 0; display: flex; justify-content: space-between; gap: 16px; font-weight: 500; font-size: 15.5px; }
.faq-grid summary::-webkit-details-marker { display: none; }
.faq-grid summary::after { content: "+"; font-family: var(--font-mono); color: var(--muted); }
.faq-grid details[open] summary::after { content: "–"; }
.faq-grid details p { margin: -6px 0 18px; color: var(--copy); font-size: 15px; max-width: 42em; }


/* cta + footer */
.cta { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 32px; border: 1px solid var(--line-strong); border-radius: 12px; background: var(--panel); }
.cta h2 { margin: 0; font-size: clamp(22px, 2.6vw, 28px); }
.cta p { margin: 6px 0 0; color: var(--muted); font-size: 14.5px; }
.icode-public-footer { padding-block: 40px 56px; font-size: 14px; color: var(--muted); border-top: 1px solid var(--line); }
.icode-public-footer .logo { color: var(--ink); }
.icode-public-footer .footer-tag { margin: 10px 0 0; max-width: 28em; }
.icode-public-footer .cols { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1.4fr); gap: 32px; }
.icode-public-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.icode-public-footer .num { font-variant-numeric: tabular-nums; }
.icode-public-footer a:hover { color: var(--ink); }
.icode-public-footer .copy { margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

@media (max-width: 1000px) { .teachers { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 900px) {
  nav.main { display: none; }
  header.site .wrap { gap: 10px; }
  header.site .btn-dark { margin-left: auto; }
  .menu-mobile { display: block; border: 0; }
  .menu-mobile summary { padding: 0 14px; display: flex; align-items: center; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--panel); font-size: 14px; font-weight: 500; }
  .menu-mobile summary::after { content: none; }
  .menu-panel { position: absolute; left: 0; right: 0; top: 56px; display: grid; padding: 8px clamp(16px, 4vw, 40px) 16px; background: var(--bg); border-bottom: 1px solid var(--line); }
  .menu-panel a { padding: 12px 0; border-top: 1px solid var(--line); font-size: 15px; }
  .menu-panel a:first-child { border-top: 0; }
  .btn, .btn-sm, header.site .btn-dark, .menu-mobile summary { height: 44px; }
  .text-link { display: inline-flex; align-items: center; min-height: 44px; }
  .icode-home-course-card .go .btn { flex: 1; justify-content: center; }
  .icode-public-footer ul { gap: 0; }
  .icode-public-footer li a, .logo { display: inline-flex; align-items: center; min-height: 44px; }
  .faq-grid summary, .faq-list summary { min-height: 44px; }
  .crumbs a, .tabs a { display: inline-flex; align-items: center; min-height: 44px; }
  .tabs a { padding-block: 0; }
  .icode-home-course-card { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px 16px; padding: 20px; }
  .icode-home-course-card > :first-child, .icode-home-course-card .go { grid-column: 1 / -1; }
  .stats { grid-template-columns: minmax(0, 1fr); }
  .stat { border-left: 0; border-top: 1px solid var(--line); }
  .stat:first-child { border-top: 0; }
  .faq-grid, .icode-public-footer .cols { grid-template-columns: minmax(0, 1fr); gap: 24px; }
}
@media (max-width: 560px) {
  .teachers { grid-template-columns: minmax(0, 1fr); }
  .teacher { grid-template-columns: 112px minmax(0, 1fr); grid-template-rows: none; }
  .teacher .photo { aspect-ratio: auto; min-height: 100%; border-bottom: 0; border-right: 1px solid var(--line); }
}
@media (prefers-reduced-motion: no-preference) {
  .btn, .icode-home-course-card, nav.main a { transition: background-color .15s, color .15s; }
}

/* ---------- course page ---------- */
:root { --danger: #b42318; --success: #067647; }
[x-cloak] { display: none !important; }
.muted { color: var(--muted); }
.crumbs { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13.5px; color: var(--muted); }
.crumbs a:hover { color: var(--ink); }
.tabs { display: flex; width: fit-content; gap: 2px; padding: 3px; border: 1px solid var(--line); border-radius: 10px; background: var(--soft); margin-top: 20px; max-width: 100%; overflow-x: auto; }
.tabs a { padding: 7px 14px; border-radius: 7px; font-size: 13.5px; color: var(--muted); white-space: nowrap; }
.tabs a:hover { color: var(--ink); }
.tabs a[aria-current="page"] { background: var(--panel); color: var(--ink); font-weight: 500; box-shadow: 0 0 0 1px var(--line); }
.icode-course-hero { padding-block: 36px 40px; border-bottom: 1px solid var(--line); }
.icode-course-hero h1 { margin: 18px 0 0; text-align: left; max-width: 16em; font-size: clamp(32px, 4.6vw, 48px); }
.icode-course-hero .lede { margin: 14px 0 0; text-align: left; }
.stack { margin-top: 18px; display: flex; gap: 6px 14px; flex-wrap: wrap; }
.stack span + span::before { content: "·"; margin-right: 14px; color: var(--line-strong); }

.course-body { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 56px; align-items: start; padding-block: 48px 88px; }
.course-main { display: grid; gap: 56px; min-width: 0; }
.course-main h2 { font-size: clamp(22px, 2.4vw, 26px); margin: 8px 0 0; }
.course-main > section > p { color: var(--copy); margin: 14px 0 0; max-width: 40em; }
.checks { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 10px; }
.checks li { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 10px; color: var(--copy); }
.checks li::before { content: "✓"; color: var(--accent-text); font-weight: 600; }
.syllabus { margin-top: 18px; }
.syllabus ol { list-style: none; margin: 0; padding: 0; }
.syllabus li { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 12px; padding: 16px 20px; border-top: 1px solid var(--line); }
.syllabus li:first-child { border-top: 0; }
.syllabus .n { font: 500 12px/1.9 var(--font-mono); color: var(--muted); }
.syllabus strong { font-weight: 500; }
.row-copy { display: block; margin-top: 4px; font-size: 14.5px; color: var(--copy); }
.row-meta { display: block; margin-top: 6px; }
.points-list { margin-top: 18px; }
.point { padding: 16px 20px; border-top: 1px solid var(--line); }
.point:first-child { border-top: 0; }
.point h3 { margin: 0; font-size: 15.5px; font-weight: 600; }
.point p { margin: 4px 0 0; font-size: 14.5px; color: var(--copy); }
.teacher-rows { margin-top: 18px; }
.teacher-row { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 18px; padding: 18px 20px; border-top: 1px solid var(--line); }
.teacher-row:first-child { border-top: 0; }
.teacher-row .photo { aspect-ratio: 1; border: 1px solid var(--line); border-radius: 10px; font-size: 20px; }
.teacher-row h3 { margin: 0; font-size: 16px; font-weight: 600; }
.teacher-row .role { font-size: 13.5px; color: var(--accent-text); margin-top: 2px; }
.teacher-row p { margin: 8px 0 0; font-size: 14.5px; color: var(--copy); }
.teacher-row .skills, .teacher-row .teaches { margin-top: 8px; }
.faq-list { margin-top: 18px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { list-style: none; cursor: pointer; padding: 18px 0; display: flex; justify-content: space-between; gap: 16px; font-weight: 500; font-size: 15.5px; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; font-family: var(--font-mono); color: var(--muted); }
.faq-list details[open] summary::after { content: "–"; }
.faq-list details p { margin: -6px 0 18px; color: var(--copy); font-size: 15px; max-width: 42em; }

.aside { position: sticky; top: 76px; }
.aside-sec { padding: 18px 20px; border-top: 1px solid var(--line); }
.aside-sec:first-child { border-top: 0; }
.facts { margin: 0; display: grid; gap: 10px; }
.facts div { display: flex; justify-content: space-between; gap: 12px; font-size: 14.5px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; font-weight: 500; text-align: right; font-variant-numeric: tabular-nums; }
.price { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.price strong { font-size: 28px; font-weight: 600; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.price s { color: var(--muted); font-size: 15px; font-variant-numeric: tabular-nums; }
.offer { margin: 8px 0 0; font-size: 13.5px; color: var(--copy); }
.offer b { color: var(--accent-text); font-weight: 600; }
.shift-label { margin-bottom: 6px; }
.shift { display: grid; gap: 2px; padding: 12px 0; border-top: 1px dashed var(--line); font-size: 14px; }
.shift:nth-child(2) { border-top: 0; padding-top: 4px; }
.shift .name { font-weight: 500; }
.shift .when { color: var(--muted); font-variant-numeric: tabular-nums; }
.btn-block { width: 100%; justify-content: center; height: 44px; font-size: 15px; }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.aside-note { margin: 10px 0 0; text-align: center; font-size: 12.5px; color: var(--muted); }
.aside-note.left { text-align: left; margin: 0; }
.mobile-bar { display: none; }

/* ---------- registration modal ---------- */
body.icode-modal-lock { position: fixed; top: var(--icode-modal-scroll-y, 0); left: 0; right: 0; width: 100%; overflow: hidden; }
.icode-registration-modal { position: fixed; inset: 0; z-index: 50; display: flex; justify-content: center; align-items: flex-start; padding: 16px; overflow-y: auto; overscroll-behavior: contain; }
.icode-registration-modal__backdrop { position: fixed; inset: 0; background: rgba(14, 17, 23, 0.45); }
.icode-registration-modal__panel { position: relative; margin: auto; width: min(100%, 520px); max-height: calc(100dvh - 32px); overflow-y: auto; padding: 24px; border: 1px solid var(--line-strong); border-radius: 12px; background: var(--panel); text-align: left; }
.icode-registration-modal__panel:focus { outline: none; }
.reg-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.reg-head h2 { margin: 8px 0 0; font-size: clamp(24px, 3vw, 30px); }
.reg-head p { margin: 6px 0 0; color: var(--copy); font-size: 14.5px; }
.modal-close { flex: none; width: 36px; height: 36px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--panel); color: var(--muted); font-size: 20px; line-height: 1; cursor: pointer; }
.icode-registration-success .modal-close { position: absolute; top: 16px; right: 16px; }
.modal-close:hover { color: var(--ink); background: var(--soft); }
.steps { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 20px 0 16px; }
.steps span { font: 500 12px/1 var(--font-mono); color: var(--muted); padding-top: 10px; border-top: 2px solid var(--line-strong); }
.steps span.on { color: var(--ink); border-top-color: var(--accent); }
.steps span.done { border-top-color: var(--ink); }
.course-chip { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--soft); font-size: 14px; margin-bottom: 20px; }
.course-chip strong { font-weight: 500; }
.course-chip a { color: var(--accent-text); font-size: 13px; white-space: nowrap; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 6px; min-width: 0; align-content: start; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 500; }
.field label span { color: var(--muted); font-weight: 400; }
.field input, .field select { height: 40px; padding: 0 12px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--panel); color: var(--ink); font: 400 15px var(--font-sans); width: 100%; box-shadow: none; }
.field input:focus, .field select:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.field[data-invalid] input, .field[data-invalid] select { border-color: var(--danger); }
.icode-registration-error { display: block; font-size: 13px; color: var(--danger); }
.icode-registration-error ul { margin: 0; padding: 0; list-style: none; }
.reg-actions { display: flex; gap: 10px; justify-content: space-between; margin-top: 24px; }
.reg-actions .btn-primary { margin-left: auto; }
.options { border: 0; margin: 0; padding: 0; min-width: 0; }
.options legend { margin-bottom: 10px; padding: 0; }
.option { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 12px; align-items: start; padding: 14px 16px; border: 1px solid var(--line-strong); border-radius: 10px; cursor: pointer; }
.option + .option { margin-top: 10px; }
.option input { margin: 3px 0 0; accent-color: var(--accent); width: 16px; height: 16px; }
.option:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.option .t { display: block; font-weight: 500; font-size: 15px; }
.option .s { display: block; font-size: 13.5px; color: var(--muted); font-variant-numeric: tabular-nums; }
.options .icode-registration-error { margin-top: 10px; }
.done-box { text-align: center; padding: 24px 8px 8px; }
.done-box .tick { width: 48px; height: 48px; margin: 0 auto 14px; border-radius: 50%; display: grid; place-items: center; background: color-mix(in srgb, var(--success) 14%, transparent); color: var(--success); font-size: 22px; font-weight: 600; }
.done-box h2 { margin: 10px auto 0; font-size: 24px; }
.done-box p { margin: 8px auto 0; color: var(--copy); max-width: 30em; }
.done-actions { margin-top: 22px; }

/* ---------- 404 / 500 ---------- */
.icode-error-page { padding-block: 88px 112px; text-align: center; }
.icode-error-page .eyebrow { font-size: 13px; }
.icode-error-page h1 { margin-top: 14px; font-size: clamp(32px, 4.6vw, 48px); }
.icode-error-page .lede { margin: 14px auto 0; max-width: 34em; color: var(--copy); }
.error-actions { margin-top: 28px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.error-courses { max-width: 560px; margin: 48px auto 0; text-align: left; }
.error-courses a { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 16px; align-items: center; padding: 16px 20px; border-top: 1px solid var(--line); }
.error-courses a:first-child { border-top: 0; }
.error-courses a:hover { background: var(--soft); }
.error-courses .mono { font-size: 12px; color: var(--muted); }

/* ---------- sign-in pages (login, signup, password reset) ---------- */
.auth-wrap { max-width: 440px; margin: 0 auto; padding-block: 48px 88px; }
.auth-head h1 { margin: 10px 0 0; max-width: none; text-align: left; font-size: clamp(28px, 3.6vw, 36px); }
.auth-head p { margin: 8px 0 0; color: var(--copy); }
.auth-head + .auth-messages, .auth-head + .panel { margin-top: 24px; }
.auth-card { padding: 24px; }
.auth-card.done-box { padding: 32px 24px; }
.auth-card.done-box h1 { margin: 12px auto 0; max-width: none; font-size: 24px; }
.auth-messages { margin-bottom: 16px; }
.auth-message { margin: 0 0 12px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--soft); font-size: 14px; color: var(--copy); }
.auth-message.is-error { border-color: color-mix(in srgb, var(--danger) 40%, transparent); background: color-mix(in srgb, var(--danger) 8%, transparent); color: var(--danger); }
.auth-providers { display: grid; gap: 10px; }
.auth-providers .btn { gap: 10px; }
.provider-badge { display: inline-grid; place-items: center; width: 22px; height: 22px; border: 1px solid var(--line-strong); border-radius: 50%; font-size: 9.5px; }
.auth-divider { display: flex; align-items: center; gap: 12px; margin: 20px 0; font-size: 12px; color: var(--muted); }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
.fields.one { grid-template-columns: minmax(0, 1fr); }
.auth-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin: 16px 0 20px; font-size: 14px; }
.auth-row a, .auth-alt a { color: var(--accent-text); }
.check { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }
.check input { width: 16px; height: 16px; accent-color: var(--accent); margin: 0; }
.auth-submit { margin-top: 20px; }
.auth-alt { margin: 20px 0 0; text-align: center; font-size: 14.5px; color: var(--copy); }

/* ---------- registration page (/course/<slug>/register) ---------- */
header.site .lang { margin-left: auto; font-size: 12px; color: var(--muted); }
header.site .lang:hover { color: var(--ink); }
.reg-wrap { max-width: 560px; margin: 0 auto; padding-block: 40px 88px; }
.reg-page-head h1 { margin: 10px 0 0; max-width: none; text-align: left; font-size: clamp(28px, 3.6vw, 36px); }
.reg-page-head p { margin: 8px 0 0; color: var(--copy); }
.reg-wrap .steps { margin: 24px 0 16px; }
.reg-card { padding: 24px; }
.summary { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 12px; font-size: 14.5px; }
.summary strong { font-variant-numeric: tabular-nums; }

@media (max-width: 900px) {
  .course-body { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  body.icode-course-public-page { padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px)); }
  .aside { position: static; order: -1; }
  .mobile-bar { display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; gap: 12px; align-items: center; justify-content: space-between; padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0px)); background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(10px); border-top: 1px solid var(--line); }
  .mobile-bar strong { display: block; font-size: 17px; font-variant-numeric: tabular-nums; }
  .mobile-bar .mono { display: block; }
  .fields { grid-template-columns: minmax(0, 1fr); }
  .field input, .field select { height: 44px; font-size: 16px; }
  .reg-actions .btn { height: 44px; }
  .icode-registration-modal { align-items: flex-end; padding: 0; }
  .icode-registration-modal__panel { margin: auto 0 0; width: 100%; max-height: 92dvh; border-radius: 12px 12px 0 0; padding: 20px 16px calc(20px + env(safe-area-inset-bottom, 0px)); }
}
@media (max-width: 560px) {
  .reg-wrap { padding-block: 24px 64px; }
  .auth-wrap { padding-block: 28px 64px; }
  .auth-card { padding: 20px 16px; }
  .icode-error-page { padding-block: 56px 72px; }
  .error-courses a { padding: 14px 16px; }
  .reg-card { padding: 20px 16px; }
  .teacher-row { grid-template-columns: 64px minmax(0, 1fr); gap: 14px; padding: 16px; }
}