/* Курсы: страницы курса, кабинета ученика, сертификата и админки. Светлая и тёмная тема, телефон.
   Основа (токены, кнопки, поля, карточки) — та же, что у вебинаров. */
:root {
  --accent: #5b5bf0;
  --accent-ink: #fff;
  --bg: #f6f7fb;
  --panel: #ffffff;
  --panel-2: #f0f2f8;
  --ink: #15172b;
  --muted: #646a85;
  --line: #e2e5ef;
  --good: #12a150;
  --warn: #e58a00;
  --bad: #e5484d;
  --live: #ef233c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 22, 50, 0.06), 0 8px 24px rgba(20, 22, 50, 0.06);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, 'Helvetica Neue', Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0e0f1a;
    --panel: #171928;
    --panel-2: #20233a;
    --ink: #eceefa;
    --muted: #9aa0bd;
    --line: #2a2e48;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}
:root[data-theme='dark'] {
  --bg: #0e0f1a;
  --panel: #171928;
  --panel-2: #20233a;
  --ink: #eceefa;
  --muted: #9aa0bd;
  --line: #2a2e48;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 15px/1.5 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; text-wrap: balance; }
h1 { font-size: clamp(26px, 4.5vw, 40px); letter-spacing: -0.02em; }
h2 { font-size: 20px; }
h3 { font-size: 16px; }
p { margin: 0 0 0.8em; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.hidden { display: none !important; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.stack > * + * { margin-top: 12px; }

/* кнопки и поля */
.btn { appearance: none; border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 10px; padding: 9px 14px; font: inherit; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 40px; text-decoration: none; transition: background 0.15s, border-color 0.15s, transform 0.1s; white-space: nowrap; }
.btn:hover { background: var(--panel-2); }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--bad); }
.btn.live { background: var(--live); border-color: var(--live); color: #fff; }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.sm { min-height: 32px; padding: 5px 10px; font-size: 13px; border-radius: 8px; }
.btn.lg { min-height: 52px; padding: 12px 22px; font-size: 17px; border-radius: 12px; }
.btn.icon { width: 40px; padding: 0; }
.btn.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
input, textarea, select { font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; width: 100%; min-height: 40px; }
textarea { resize: vertical; min-height: 80px; }
input:focus, textarea:focus, select:focus { outline: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); outline-offset: 0; border-color: var(--accent); }
input[type='checkbox'], input[type='radio'] { width: auto; min-height: 0; accent-color: var(--accent); }
label.field { display: block; }
label.field > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; font-weight: 600; }
label.check { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; cursor: pointer; }
label.check input { margin-top: 3px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px; background: var(--panel-2); font-size: 12px; font-weight: 600; color: var(--muted); }
.pill.live { background: var(--live); color: #fff; }
.pill.live::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: #fff; animation: pulse 1.4s infinite; }
.pill.auto { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.pill.good { background: color-mix(in srgb, var(--good) 16%, transparent); color: var(--good); }
@keyframes pulse { 50% { opacity: 0.35; } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

.toast-box { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); display: grid; gap: 8px; z-index: 100; width: min(420px, calc(100% - 32px)); pointer-events: none; }
.toast { background: var(--ink); color: var(--bg); border-radius: 12px; padding: 10px 14px; font-weight: 600; box-shadow: var(--shadow); animation: toastIn 0.25s ease-out; pointer-events: auto; }
.toast.bad { background: var(--bad); color: #fff; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } }

.modal-back { position: fixed; inset: 0; background: rgba(10, 12, 30, 0.5); display: grid; place-items: center; z-index: 90; padding: 16px; animation: fadeIn 0.15s; }
.modal { background: var(--panel); border-radius: 18px; padding: 22px; width: min(520px, 100%); max-height: calc(100vh - 32px); overflow: auto; box-shadow: var(--shadow); }
@keyframes fadeIn { from { opacity: 0; } }


/* ——— шапка и раскладки ——— */
.top { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-bottom: 1px solid var(--line); background: var(--panel); position: sticky; top: 0; z-index: 20; }
.top .title { font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: inherit; text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 24px 16px 64px; }
.narrow { max-width: 760px; }
.hero { display: grid; grid-template-columns: 1.3fr 1fr; gap: 28px; align-items: start; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; } }
.cover { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--radius); background: var(--panel-2); display: block; }
.desc { white-space: pre-wrap; }
.facts { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-weight: 700; flex: none; }

/* программа */
.module { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); margin-top: 12px; overflow: hidden; }
.module > header { padding: 12px 16px; font-weight: 700; display: flex; gap: 10px; align-items: center; background: var(--panel-2); }
.lesson-row { display: flex; gap: 10px; align-items: center; padding: 11px 16px; border-top: 1px solid var(--line); color: inherit; text-decoration: none; }
a.lesson-row:hover { background: var(--panel-2); }
.lesson-row .ico { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; flex: none; background: var(--panel-2); font-size: 13px; }
.lesson-row.done .ico { background: var(--good); color: #fff; }
.lesson-row.locked { color: var(--muted); }
.lesson-row .why { font-size: 12px; color: var(--muted); }

/* тарифы */
.tariffs { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.tariff { display: grid; gap: 10px; align-content: start; }
.tariff.best { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 25%, transparent), var(--shadow); }
.tariff .price { font-size: 28px; font-weight: 800; }
.tariff .old { text-decoration: line-through; color: var(--muted); font-size: 16px; margin-left: 8px; font-weight: 600; }
.tariff ul { margin: 0; padding-left: 18px; }

/* кабинет */
.course-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.progress { height: 8px; border-radius: 4px; background: var(--panel-2); overflow: hidden; }
.progress i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--good)); border-radius: 4px; transition: width 0.4s; }
.lesson-layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 20px; align-items: start; }
.lesson-layout aside { position: sticky; top: 72px; max-height: calc(100dvh - 90px); overflow-y: auto; }
@media (max-width: 900px) { .lesson-layout { grid-template-columns: 1fr; } .lesson-layout aside { position: static; max-height: none; order: 2; } }
.video { position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: var(--radius); overflow: hidden; }
.video iframe, .video video { width: 100%; height: 100%; border: 0; display: block; }
.watermark { position: absolute; pointer-events: none; color: rgba(255, 255, 255, 0.28); font: 600 13px/1 var(--font); white-space: nowrap; text-shadow: 0 0 2px rgba(0, 0, 0, 0.6); animation: wm 40s linear infinite; }
@keyframes wm { 0% { top: 8%; left: 6%; } 25% { top: 70%; left: 55%; } 50% { top: 30%; left: 70%; } 75% { top: 82%; left: 10%; } 100% { top: 8%; left: 6%; } }
.md h2, .md h3 { margin-top: 1.2em; }
.md ul { padding-left: 20px; }
.md p { margin: 0 0 0.8em; }
.files a { display: flex; gap: 8px; align-items: center; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; margin-top: 6px; text-decoration: none; color: inherit; background: var(--panel); }
.quiz-q { margin-top: 14px; }
.quiz-q label { display: flex; gap: 8px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 10px; margin-top: 6px; cursor: pointer; background: var(--panel); }
.quiz-q label.right { border-color: var(--good); }
.hw-attempt { border-left: 3px solid var(--line); padding: 6px 10px; margin-top: 10px; }
.hw-attempt.accepted { border-color: var(--good); }
.hw-attempt.returned { border-color: var(--warn); }
.hw-attempt.submitted { border-color: var(--accent); }
.lesson-nav { display: flex; gap: 10px; justify-content: space-between; margin-top: 20px; flex-wrap: wrap; }

/* сертификат */
.cert { background: #fff; color: #15172b; max-width: 900px; margin: 24px auto; aspect-ratio: 1.414; border-radius: 6px; box-shadow: var(--shadow); padding: 6%; position: relative; display: grid; align-content: center; justify-items: center; text-align: center; border: 14px solid color-mix(in srgb, var(--accent) 85%, #000); }
.cert h1 { font-size: clamp(22px, 4vw, 44px); letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 0.3em; }
.cert .name { font-size: clamp(22px, 4vw, 40px); font-weight: 800; border-bottom: 2px solid #ccd; padding: 0 30px 6px; margin: 0.4em 0; }
.cert .meta { display: flex; justify-content: space-between; width: 100%; margin-top: 8%; font-size: 13px; color: #555; text-align: left; }
@media print { .top, .no-print { display: none !important; } body { background: #fff; } .cert { box-shadow: none; margin: 0 auto; } }

/* админка */
.subtabs { display: flex; gap: 4px; overflow-x: auto; border-bottom: 1px solid var(--line); margin: 14px 0 16px; scrollbar-width: none; }
.subtabs button { background: none; border: 0; padding: 10px 12px; font: inherit; font-weight: 600; color: var(--muted); border-bottom: 2px solid transparent; cursor: pointer; white-space: nowrap; }
.subtabs button.on { color: var(--ink); border-bottom-color: var(--accent); }
.list-item { padding: 10px; border: 1px solid var(--line); border-radius: 10px; display: flex; gap: 8px; align-items: center; margin-top: 6px; background: var(--panel); }
.row-click { cursor: pointer; }
.row-click:hover { border-color: var(--accent); }
table.t { width: 100%; border-collapse: collapse; font-size: 14px; }
table.t th, table.t td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.t th { color: var(--muted); font-weight: 600; font-size: 12px; }
.table-wrap { overflow-x: auto; }
.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 10px; }
.kpi b { display: block; font-size: 22px; font-variant-numeric: tabular-nums; }
.kpi span { font-size: 12px; color: var(--muted); }
@media (max-width: 700px) { .kpis { grid-template-columns: repeat(2, 1fr); } }
.bar-row { display: grid; grid-template-columns: minmax(0, 1fr) 160px 60px; gap: 10px; align-items: center; padding: 6px 0; font-size: 14px; }
.bar { height: 10px; background: var(--panel-2); border-radius: 5px; overflow: hidden; position: relative; }
.bar i { position: absolute; inset: 0 auto 0 0; background: color-mix(in srgb, var(--accent) 40%, transparent); }
.bar b { position: absolute; inset: 0 auto 0 0; background: var(--accent); }
.modal.wide { width: min(820px, 100%); }
.q-edit { border: 1px solid var(--line); border-radius: 12px; padding: 10px; margin-top: 8px; display: grid; gap: 6px; }