/* обучение names. — чёрный фон, рукописные заголовки (Caveat), текст Inter */
@font-face { font-family: 'Caveat'; src: url('fonts/Caveat-Bold.ttf') format('truetype'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('fonts/Inter-Regular.ttf') format('truetype'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('fonts/Inter-SemiBold.ttf') format('truetype'); font-weight: 600; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('fonts/Inter-Bold.ttf') format('truetype'); font-weight: 700; font-display: swap; }

:root {
  --bg: #0c0c0c;
  --surface: #161616;
  --surface-2: #1d1d1d;
  --line: #2b2b2b;
  --line-soft: #222;
  --text: #efede8;
  --muted: #9b978f;
  --mark: #ffe45c;
  --ok: #7fdca4;
  --bad: #ff8a7a;
  --base: #6fd6b0;
  --hand: 'Caveat', 'Comic Sans MS', cursive;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: anywhere;
}
body.noscroll { overflow: hidden; }
a { color: var(--text); text-underline-offset: 3px; text-decoration-color: #666; }
a:hover { text-decoration-color: var(--text); }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--mark); outline-offset: 2px; }

/* шапка */
.top {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 8px;
  height: 52px; padding: 0 12px 0 16px;
  padding-top: env(safe-area-inset-top);
  background: rgba(12, 12, 12, .92); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.logo img { display: block; height: 17px; width: auto; }
.ptitle { flex: 1; min-width: 0; color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding-left: 6px; }
.ico {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line); background: transparent;
  font-size: 18px; line-height: 1; display: grid; place-items: center;
}
.ico:hover { background: var(--surface); }

/* меню разделов */
.secnav {
  position: sticky; top: 52px; z-index: 19;
  display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none;
  padding: 8px 16px; background: rgba(12, 12, 12, .92); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.secnav::-webkit-scrollbar { display: none; }
.secnav a {
  flex: none; padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line);
  font-size: 13px; text-decoration: none; color: var(--muted); white-space: nowrap;
}
.secnav a.is-active { color: var(--bg); background: var(--text); border-color: var(--text); }
.secnav a.is-done::after { content: ' ✓'; color: var(--ok); }
.secnav a.is-active.is-done::after { color: #1f7a45; }

main { max-width: 760px; margin: 0 auto; padding: 0 16px 40px; }

/* заголовки */
.hero { padding: 28px 0 8px; }
.hero h1 { font: 700 56px/1 var(--hand); margin: 0 0 10px; letter-spacing: .5px; }
.hero p { margin: 0; color: var(--muted); max-width: 560px; }
.hero.home { padding-top: 44px; }
.hero.home h1 { font-size: 72px; }

section { margin-top: 40px; scroll-margin-top: 112px; }
section h2 {
  font: 700 38px/1.05 var(--hand); margin: 0 0 14px; text-transform: lowercase;
  display: inline-block; padding-bottom: 8px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 10' preserveAspectRatio='none'%3E%3Cpath d='M2 6 C 20 1, 35 9, 55 5 S 95 2, 118 6' fill='none' stroke='%23efede8' stroke-width='2.2' stroke-linecap='round'/%3E%3C/svg%3E") left bottom / 100% 9px no-repeat;
}
h3 { font-size: 17px; margin: 14px 0 8px; }

/* текст */
p { margin: 8px 0; }
strong { font-weight: 700; color: #fff; }
em { color: #d8d4cc; }
mark { background: var(--mark); color: #111; padding: 0 .2em; border-radius: 3px; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
ul, ol { margin: 6px 0 10px; padding-left: 22px; }
li { margin: 4px 0; padding-left: 2px; }
li::marker { color: var(--muted); }
.sub { padding-left: 14px; }
.intro { margin-top: 18px; color: #d8d4cc; }

/* треугольнички */
details { border-top: 1px dashed var(--line); scroll-margin-top: 112px; }
details:last-of-type { border-bottom: 1px dashed var(--line); }
summary {
  list-style: none; cursor: pointer; padding: 14px 4px 14px 28px; position: relative;
  font-weight: 600; font-size: 16px;
}
summary::-webkit-details-marker { display: none; }
summary::before {
  content: ''; position: absolute; left: 6px; top: 21px;
  border-style: solid; border-width: 5px 0 5px 8px; border-color: transparent transparent transparent var(--text);
  transition: transform .15s ease;
}
details[open] > summary::before { transform: rotate(90deg); }
summary:hover { color: #fff; }
summary mark { font-size: 17px; }
.tb { padding: 0 2px 16px 28px; }
.tb details { border-top-color: var(--line-soft); }
.tb details:last-of-type { border-bottom: 0; }
.tb summary { padding-left: 24px; font-size: 15px; }
.tb summary::before { left: 4px; top: 20px; border-width: 4px 0 4px 7px; }
.tb .tb { padding-left: 24px; }
details.flash > summary, section.flash h2 { animation: flash 1.6s ease; }
@keyframes flash { 0%, 40% { background: rgba(255, 228, 92, .18); } 100% { background: transparent; } }

/* видео-уроки с таймкодами */
.player { margin: 6px 0 20px; scroll-margin-top: 112px; }
.player video {
  display: block; width: 100%; height: auto; max-height: 70vh;
  background: #000; border-radius: 14px; border: 1px solid var(--line-soft);
}
.pbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin: 6px 0 0; color: var(--muted); font-size: 13px; }
.pbar > details, .pbar > span { flex: 1 1 auto; min-width: 0; }
.pbar .speed { margin-top: 3px; }
.speed {
  border: 1px solid var(--line); background: var(--surface); border-radius: 999px;
  padding: 4px 12px; font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums;
}
details.chapters { border: 0; margin-top: 0; }
details.chapters > summary { padding: 8px 4px 8px 22px; font-size: 14px; color: var(--muted); }
details.chapters > summary::before { left: 4px; top: 15px; border-width: 4px 0 4px 7px; }
.chapters ol { list-style: none; margin: 0; padding: 0 0 4px; display: grid; gap: 2px; }
@media (min-width: 640px) { .chapters ol { grid-template-columns: 1fr 1fr; column-gap: 12px; } }
.chapters li { margin: 0; padding: 0; }
.chapters button {
  width: 100%; display: flex; gap: 12px; align-items: baseline; text-align: left;
  padding: 7px 10px; border: 0; border-radius: 10px; background: transparent; font-size: 14px; line-height: 1.35;
}
.chapters button:hover { background: var(--surface); }
.chapters button b { flex: none; min-width: 3.3em; font-weight: 600; color: var(--muted); font-variant-numeric: tabular-nums; }
.chapters button span { min-width: 0; }
.chapters button.is-now { background: var(--surface-2); }
.chapters button.is-now b { color: var(--ok); }
.vjump {
  display: inline-block; margin: 2px 0 8px; padding: 5px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); font-size: 13px; font-weight: 600;
}
.vjump:hover { border-color: #555; }

/* лента залетевших роликов в начале урока */
.feed { margin: 22px 0 6px; }
.feed-title { font: 700 28px/1.1 var(--hand); margin: 0 0 10px; }
.feed-view {
  overflow: hidden; margin: 0 -16px; padding: 0 16px;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 16px, #000 calc(100% - 16px), transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 16px, #000 calc(100% - 16px), transparent 100%);
}
.feed-track { display: flex; gap: 10px; width: max-content; animation: feed-scroll 32s linear infinite; }
.feed-row { display: flex; gap: 10px; }
.feed:hover .feed-track, .feed.is-paused .feed-track { animation-play-state: paused; }
@keyframes feed-scroll { from { transform: translateX(0); } to { transform: translateX(calc(-50% - 5px)); } }
.feed-item {
  position: relative; flex: none; width: 132px; aspect-ratio: 9 / 16; border-radius: 14px; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line-soft); text-decoration: none;
}
.feed-item video { display: block; width: 100%; height: 100%; object-fit: cover; }
.feed-badge {
  position: absolute; left: 6px; bottom: 6px; padding: 3px 8px; border-radius: 999px;
  background: rgba(12, 12, 12, .8); color: #fff; font-size: 12px; font-weight: 700; white-space: nowrap;
}
.feed-src { position: absolute; right: 6px; top: 6px; padding: 2px 7px; border-radius: 999px; background: rgba(12, 12, 12, .6); color: #ddd; font-size: 10px; }
@media (min-width: 640px) { .feed-item { width: 160px; } }
@media (prefers-reduced-motion: reduce) { .feed-view { overflow-x: auto; } .feed-row[aria-hidden] { display: none; } }

/* ссылки-чипсы */
.chip {
  display: inline-block; padding: 3px 10px; margin: 2px 4px 2px 0; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface);
  font-size: 13px; line-height: 1.5; text-decoration: none; white-space: nowrap;
}
.chip:hover { border-color: #555; }
.chip.ref { border-color: #3a3a3a; }
.chip.doc { background: var(--text); color: var(--bg); border-color: var(--text); font-weight: 600; }
.refs { display: flex; flex-wrap: wrap; gap: 0; margin: 6px 0 10px; }

/* картинки и видео */
figure { margin: 10px 0 14px; }
figure img { display: block; max-width: 100%; max-height: 70vh; height: auto; border-radius: 12px; border: 1px solid var(--line-soft); }
.video {
  margin: 10px 0 18px; padding: 14px; border: 1.5px dashed #444; border-radius: 14px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px;
}
.video button {
  border: 0; background: var(--text); color: var(--bg); font-weight: 700;
  padding: 10px 16px; border-radius: 999px;
}
.video span { color: var(--muted); font-size: 13px; flex: 1 1 200px; }
.video.off { display: block; }
.video.off b { display: block; margin-bottom: 4px; }
.video.on { padding: 0; border: 0; display: block; }
.video iframe { display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; border-radius: 14px; background: #000; }

/* подсветка текста из общей базы — только по адресу с «?база», для правки уроков */
body.show-base .b { box-shadow: inset 3px 0 0 var(--base); background: rgba(111, 214, 176, .07); }
body.show-base li.b { padding-left: 8px; }
body.show-base p.b, body.show-base h3.b, body.show-base figure.b, body.show-base .refs.b { padding: 2px 0 2px 10px; }

/* кнопка «изучено» */
.done {
  display: block; width: 100%; margin: 22px 0 0; padding: 12px 16px;
  border: 1.5px solid var(--line); border-radius: 14px; background: transparent; font-weight: 600; color: var(--muted);
}
.done:hover { border-color: #555; color: var(--text); }
.done.is-on { border-color: var(--ok); color: var(--ok); }

/* под блоком: кнопки «открыть конспект» и «пройти тест» */
.secbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 6px 0 4px; }
.opener {
  flex: 1 1 auto; padding: 11px 16px; border-radius: 14px; border: 1px solid var(--line);
  background: var(--surface); font-weight: 600; font-size: 15px; text-align: center;
}
.opener:hover { border-color: #555; }
.opener.is-open { background: var(--text); color: var(--bg); border-color: var(--text); }
.tstatus { flex-basis: 100%; font-size: 13px; color: var(--muted); }
.tstatus:empty { display: none; }
.tstatus.ok { color: var(--ok); }
.notes { margin-top: 10px; }

/* тест после раздела */
.quiz { margin-top: 4px; }
.score.is-ok { color: var(--ok); }
.q { padding: 14px; margin: 12px 0; background: var(--surface); border-radius: 16px; border: 1px solid var(--line-soft); }
.qt { margin: 0 0 10px; font-weight: 600; display: flex; gap: 10px; }
.qt span { flex: none; width: 26px; height: 26px; border-radius: 50%; border: 1.5px solid var(--text); display: grid; place-items: center; font: 700 18px/1 var(--hand); }
.opts { display: grid; gap: 8px; }
.opts button {
  text-align: left; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface-2);
}
.opts button:hover:not(:disabled) { border-color: #555; }
.opts button:disabled { cursor: default; }
.opts button.right { border-color: var(--ok); color: var(--ok); }
.opts button.wrong { border-color: var(--bad); color: var(--bad); text-decoration: line-through; }
.why { display: none; margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.q.answered .why { display: block; }
.score { font-weight: 600; min-height: 1em; }

/* главная */
.fake-search {
  display: block; width: 100%; margin: 22px 0 0; padding: 14px 18px; text-align: left;
  border-radius: 14px; border: 1px solid var(--line); background: var(--surface); color: var(--muted);
  display: flex; align-items: center; gap: 10px;
}
.cards { display: grid; gap: 12px; margin-top: 26px; }
@media (min-width: 640px) { .cards { grid-template-columns: 1fr 1fr; } }
.card {
  display: block; padding: 18px 18px 16px; border-radius: 18px; border: 1px solid var(--line);
  background: var(--surface); text-decoration: none;
}
.card:hover { border-color: #555; }
.card b { display: block; font: 700 34px/1 var(--hand); margin-bottom: 6px; }
.card span { display: block; color: var(--muted); font-size: 14px; min-height: 2.6em; }
.bar { display: block; height: 4px; margin: 14px 0 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--ok); transition: width .3s ease; }
.card small { color: var(--muted); font-size: 12px; }

/* поиск */
.search { position: fixed; inset: 0; z-index: 50; background: rgba(8, 8, 8, .97); display: flex; flex-direction: column; padding-top: env(safe-area-inset-top); }
.search[hidden] { display: none; }
.sbox { display: flex; gap: 8px; padding: 12px 12px 12px 16px; border-bottom: 1px solid var(--line-soft); max-width: 792px; width: 100%; margin: 0 auto; }
.sbox input {
  flex: 1; min-width: 0; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--surface); color: var(--text); font: 400 16px var(--sans);
}
.sres { overflow-y: auto; padding: 8px 16px 40px; max-width: 792px; width: 100%; margin: 0 auto; }
.hit { display: block; padding: 12px 0; border-bottom: 1px dashed var(--line); text-decoration: none; }
.hit small { display: block; color: var(--muted); font-size: 12px; }
.hit b { display: block; margin: 2px 0; }
.hit span { display: block; color: #cfcac1; font-size: 14px; }
.hint { color: var(--muted); }

footer { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line-soft); }
.linkbtn { border: 0; background: none; padding: 0; color: var(--muted); text-decoration: underline; text-underline-offset: 3px; }
.linkbtn:hover { color: var(--text); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }

/* вход и регистрация (страницы сервера) */
main.auth { max-width: 440px; padding-top: 36px; }
main.auth.wide { max-width: 1200px; }
.auth h1 { font: 700 48px/1 var(--hand); margin: 0 0 10px; text-wrap: balance; }
.auth > p { color: var(--muted); }
.authform { display: grid; gap: 8px; margin-top: 18px; }
.authform label { font-size: 14px; color: var(--muted); margin-top: 6px; }
.authform input:not([type=checkbox]) {
  padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--surface); color: var(--text); font: 400 16px var(--sans);
}
.authform .check { display: flex; gap: 10px; align-items: flex-start; color: var(--text); font-size: 14px; margin-top: 10px; }
.authform .check input { margin-top: 2px; width: 18px; height: 18px; accent-color: var(--ok); flex: none; }
.authform button {
  margin-top: 12px; padding: 13px 16px; border: 0; border-radius: 14px;
  background: var(--text); color: var(--bg); font-weight: 700; font-size: 16px;
}
.err { color: var(--bad); }
.muted { color: var(--muted); }

/* статистика для продюсеров */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 12px 0; }
.tabs a { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); text-decoration: none; color: var(--muted); font-size: 13px; }
.tabs a.on { background: var(--text); color: var(--bg); border-color: var(--text); }
.tablewrap { overflow-x: auto; margin-top: 14px; border: 1px solid var(--line-soft); border-radius: 12px; }
table.stats { border-collapse: collapse; font-size: 13px; min-width: 100%; }
.stats th, .stats td { padding: 8px 10px; border-bottom: 1px solid var(--line-soft); text-align: left; vertical-align: top; white-space: nowrap; }
.stats th { font-weight: 600; color: var(--muted); background: var(--surface); }
.stats th.t { white-space: normal; min-width: 104px; text-align: center; overflow-wrap: normal; hyphens: none; }
.stats td.t { text-align: center; font-variant-numeric: tabular-nums; }
.stats td small { display: block; color: var(--muted); font-size: 11px; }
.stats td.ok { color: var(--ok); }
.stats td.bad { color: var(--bad); }
.stats td.muted { color: var(--muted); }
.stats td.n { font-variant-numeric: tabular-nums; }

/* открытый сайт: тёмные системные элементы, убранные ссылки на таблицы */
:root { color-scheme: dark; }
.nolink { color: var(--muted); font-style: italic; }