/* «Обучение»: the lesson list, the lesson player and its text guide. Built on site.css tokens. */

.learn { padding-bottom: clamp(56px, 7vw, 96px); }
/* Components here set display; the hidden attribute must still win (no-JS player, guest support). */
.learn [hidden] { display: none !important; }
.learn h2 { font-size: clamp(24px, 2.6vw, 34px); }

/* ---- Index ---- */
.learn-hero { padding: clamp(36px, 5vw, 72px) 0 clamp(40px, 5vw, 64px); }
.learn-hero__in { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); gap: clamp(28px, 5vw, 72px); align-items: end; }
.learn-hero .eyebrow { display: block; margin-bottom: 20px; }
.learn-hero h1 { max-width: 14ch; margin-bottom: 24px; font-size: clamp(36px, 5.4vw, 70px); }
.learn-hero h1 em { position: relative; z-index: 0; font-style: normal; white-space: nowrap; }
.learn-hero h1 em::after { position: absolute; z-index: -1; right: -.06em; bottom: .1em; left: -.06em; height: .34em; background: var(--signal); content: ""; }
.learn-hero .lead { margin-bottom: 30px; }
.learn-hero__cta { display: flex; flex-wrap: wrap; gap: 12px; }
.learn-hero__progress { display: flex; align-items: center; gap: 14px; margin-top: 22px; color: var(--slate); font-size: 15px; }
.learn-meter { position: relative; width: 160px; height: 6px; overflow: hidden; border-radius: 3px; background: var(--rule); }
.learn-meter i { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--ink); }

.learn-needs { padding: clamp(24px, 3vw, 36px); border-radius: 4px; background: var(--ink); color: var(--paper); }
.learn-needs h2 { margin-bottom: 20px; font-size: 22px; }
.learn-needs ul { display: grid; gap: 16px; padding: 0; list-style: none; }
.learn-needs li { display: grid; grid-template-columns: 34px 1fr; column-gap: 12px; }
.learn-needs li span { grid-row: span 2; color: var(--signal); font-family: var(--mono); font-size: 13px; font-weight: 700; line-height: 1.9; }
.learn-needs strong { font-size: 16px; }
.learn-needs small { color: var(--pending); font-size: 14px; }

.learn-parts { display: grid; gap: clamp(48px, 6vw, 80px); }
.learn-part__head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 8px 40px; align-items: end; margin-bottom: 26px; padding-bottom: 18px; border-bottom: 1px solid var(--rule); }
.learn-part__head .eyebrow { grid-column: 1 / -1; }
.learn-part__head p { color: var(--slate); }
.learn-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; padding: 0; list-style: none; }

.learn-card { display: flex; height: 100%; flex-direction: column; overflow: hidden; border: 1px solid var(--rule); border-radius: 4px; background: var(--white); color: var(--ink); transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease; }
.learn-card:hover { border-color: var(--ink); box-shadow: 0 14px 34px rgb(14 18 48 / 12%); transform: translateY(-2px); }
.learn-card__media { position: relative; display: block; aspect-ratio: 16 / 9; background: var(--ink); }
.learn-card__media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.learn-card__play { position: absolute; top: 50%; left: 50%; width: 58px; height: 58px; border-radius: 50%; background: var(--signal); box-shadow: 0 8px 22px rgb(0 0 0 / 30%); transform: translate(-50%, -50%) scale(.92); opacity: 0; transition: opacity 160ms ease, transform 160ms ease; }
.learn-card__play::after { position: absolute; top: 50%; left: 54%; border-width: 10px 0 10px 16px; border-style: solid; border-color: transparent transparent transparent var(--ink); transform: translate(-50%, -50%); content: ""; }
.learn-card:hover .learn-card__play, .learn-card:focus-visible .learn-card__play { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.learn-card__time, .learn-card__done { position: absolute; bottom: 10px; padding: 3px 8px; border-radius: 2px; font-family: var(--mono); font-size: 12px; font-weight: 700; }
.learn-card__time { right: 10px; background: rgb(14 18 48 / 86%); color: var(--paper); }
.learn-card__done { left: 10px; background: var(--signal); color: var(--ink); }
.learn-card__body { display: grid; flex: 1; align-content: start; gap: 8px; padding: 20px 22px 22px; }
.learn-card__num { color: var(--slate); font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; }
.learn-card__title { font-family: var(--display); font-size: 19px; letter-spacing: -.02em; line-height: 1.2; }
.learn-card__text { color: var(--slate); font-size: 15.5px; }
.learn-card__meta { margin-top: 6px; color: var(--pending); font-size: 13.5px; }

/* ---- Support block (both pages) ---- */
.learn-support { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 48px; align-items: center; margin-top: clamp(48px, 6vw, 80px); padding: clamp(26px, 4vw, 44px); border-left: 6px solid var(--signal); border-radius: 4px; background: var(--white); }
.learn-support .eyebrow { display: block; margin-bottom: 12px; }
.learn-support h2 { margin-bottom: 10px; }
.learn-support p { max-width: 62ch; color: var(--slate); }
.learn-support p a { text-decoration: underline; text-underline-offset: 3px; }
.learn-support__actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }

/* ---- Lesson ---- */
.learn--lesson { padding-top: clamp(20px, 3vw, 36px); }
.learn-crumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; color: var(--slate); font-size: 14px; }
.learn-crumbs a { text-decoration: underline; text-underline-offset: 3px; }
.learn-lesson__head { margin-bottom: clamp(22px, 3vw, 34px); }
.learn-lesson__head .eyebrow { display: block; margin-bottom: 14px; }
.learn-lesson__modes { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-top: 18px; color: var(--slate); font-size: 14.5px; }
.learn-lesson__head h1 { max-width: 22ch; margin-bottom: 14px; font-size: clamp(30px, 4.4vw, 56px); }

.learn-stage { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 20px; align-items: start; }

.learn-player { position: relative; overflow: hidden; border-radius: 4px; background: var(--ink); box-shadow: 0 24px 60px rgb(14 18 48 / 22%); }
.learn-player__screen { position: relative; aspect-ratio: 16 / 9; background: var(--ink); }
.learn-player__video { display: block; width: 100%; height: 100%; background: var(--ink); }
.learn-player__big { position: absolute; top: 50%; left: 50%; width: clamp(64px, 9vw, 96px); height: clamp(64px, 9vw, 96px); border: 0; border-radius: 50%; background: var(--signal); box-shadow: 0 10px 32px rgb(0 0 0 / 35%); cursor: pointer; transform: translate(-50%, -50%); transition: transform 160ms ease, background-color 160ms ease; }
.learn-player__big:hover { background: var(--signal-soft); transform: translate(-50%, -50%) scale(1.05); }
.learn-player__big span { position: absolute; top: 50%; left: 54%; border-width: 14px 0 14px 23px; border-style: solid; border-color: transparent transparent transparent var(--ink); transform: translate(-50%, -50%); }
.learn-player__chapter-flag { position: absolute; top: 14px; left: 14px; max-width: calc(100% - 28px); padding: 6px 12px; border-radius: 2px; background: rgb(14 18 48 / 82%); color: var(--paper); font-size: 14px; font-weight: 600; opacity: 0; pointer-events: none; transition: opacity 240ms ease; }
.learn-player.is-flagged .learn-player__chapter-flag { opacity: 1; }
/* The end of a lesson: straight to the next one, without scrolling past the text guide. */
.learn-player__end { position: absolute; inset: 0; z-index: 4; display: grid; align-content: center; justify-items: center; gap: clamp(8px, 2vw, 16px); padding: 16px; background: rgb(14 18 48 / 90%); color: var(--paper); text-align: center; }
.learn-player__end .eyebrow { color: var(--signal); }
.learn-player__end .btn { max-width: 100%; white-space: normal; }
.learn-player__replay { padding: 8px 10px; border: 0; background: transparent; color: var(--paper); font: inherit; font-size: 15px; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.learn-player__replay:hover { color: var(--signal); }

.learn-player__bar { display: flex; align-items: center; gap: 6px; padding: 10px 12px; background: var(--ink); color: var(--paper); }
.learn-player__btn { display: inline-grid; place-items: center; width: 40px; height: 40px; flex: none; padding: 0; border: 0; border-radius: 2px; background: transparent; color: var(--paper); cursor: pointer; }
.learn-player__btn:hover { background: var(--ink-2); color: var(--signal); }
.learn-player__btn svg { width: 22px; height: 22px; fill: currentColor; stroke: currentColor; stroke-width: 0; }
.learn-player__btn [data-player-back] text, .learn-player__btn text { fill: currentColor; font: 700 6.5px var(--body); }
.learn-player__btn svg path[d^="M4 9V4"], .learn-player__btn svg .i-sound, .learn-player__btn svg .i-muted { fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.learn-player .i-pause, .learn-player.is-playing .i-play, .learn-player .i-muted, .learn-player.is-muted .i-sound { display: none; }
.learn-player.is-playing .i-pause, .learn-player.is-muted .i-muted { display: inline; }
.learn-player__speed { width: 48px; font-family: var(--mono); font-size: 14px; font-weight: 700; }
.learn-player__time { flex: none; min-width: 92px; padding: 0 4px; color: var(--pending); font-family: var(--mono); font-size: 13px; }
.learn-player__time [data-player-current] { color: var(--paper); }

.learn-player__track { position: relative; flex: 1; min-width: 80px; height: 40px; }
.learn-player__seek { position: absolute; inset: 0; z-index: 2; width: 100%; height: 100%; margin: 0; background: transparent; opacity: 0; cursor: pointer; }
.learn-player__track::before { position: absolute; top: 50%; right: 0; left: 0; height: 6px; border-radius: 3px; background: var(--rule-dark); transform: translateY(-50%); content: ""; }
.learn-player__fill { position: absolute; top: 50%; left: 0; width: 0; height: 6px; border-radius: 3px; background: var(--signal); transform: translateY(-50%); }
.learn-player__fill::after { position: absolute; top: 50%; right: -7px; width: 14px; height: 14px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 3px rgb(214 255 75 / 25%); transform: translateY(-50%); content: ""; }
.learn-player__marks i { position: absolute; top: 50%; width: 2px; height: 10px; background: var(--paper); opacity: .55; transform: translate(-1px, -50%); }
.learn-player__seek:focus-visible + .learn-player__fill::after { outline: 2px solid var(--paper); outline-offset: 2px; }
.learn-player__tip { position: absolute; bottom: 40px; z-index: 3; max-width: 260px; padding: 6px 10px; border-radius: 2px; background: var(--paper); color: var(--ink); font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; pointer-events: none; transform: translateX(-50%); }
.learn-player__tip b { margin-right: 6px; font-family: var(--mono); }

.learn-player:fullscreen { display: flex; flex-direction: column; border-radius: 0; }
.learn-player:fullscreen .learn-player__screen { flex: 1; aspect-ratio: auto; }

.learn-chapters { max-height: min(640px, calc((100vw - 2 * var(--pad) - 340px) * 9 / 16 + 60px)); overflow-y: auto; padding: 18px; border: 1px solid var(--rule); border-radius: 4px; background: var(--white); }
.learn-chapters h2 { margin: 2px 4px 14px; font-size: 18px; }
.learn-chapters ol { display: grid; gap: 2px; padding: 0; list-style: none; }
.learn-chapters a { display: grid; grid-template-columns: 46px 1fr; gap: 8px; padding: 8px 10px; border-radius: 2px; font-size: 14.5px; line-height: 1.35; }
.learn-chapters a:hover { background: var(--paper); }
.learn-chapters a[aria-current="true"] { background: var(--ink); color: var(--paper); }
.learn-chapters a[aria-current="true"] .learn-chapters__time { color: var(--signal); }
.learn-chapters__time { color: var(--slate); font-family: var(--mono); font-size: 13px; font-weight: 700; }
.learn-chapters a.learn-chapters__next { display: grid; grid-template-columns: minmax(0, 1fr); gap: 4px; margin-top: 12px; padding: 14px 10px 4px; border-top: 1px solid var(--rule); font-size: 14.5px; font-weight: 700; line-height: 1.35; }
.learn-chapters__next span { color: var(--slate); font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.learn-chapters a.learn-chapters__next:hover { background: none; text-decoration: underline; text-underline-offset: 3px; }

.learn-body { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 20px; margin-top: clamp(36px, 5vw, 64px); align-items: start; }
.learn-article { padding: clamp(24px, 4vw, 48px); border-radius: 4px; background: var(--white); }
.learn-article > .eyebrow { display: block; margin-bottom: 12px; }
.learn-article > h2 { margin-bottom: 26px; }
.learn-article h3 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; margin: 34px 0 12px; font-size: clamp(19px, 1.8vw, 23px); }
.learn-article h3 .learn-step { display: inline-grid; place-items: center; min-width: 34px; height: 34px; padding: 0 8px; border-radius: 2px; background: var(--signal); font-family: var(--mono); font-size: 15px; }
.learn-article p, .learn-article li { max-width: 70ch; color: #2b3054; font-size: 16.5px; }
.learn-article p + p { margin-top: 10px; }
.learn-article ol, .learn-article ul { display: grid; gap: 8px; margin: 10px 0 0; padding-left: 22px; }
.learn-article strong { color: var(--ink); }
.learn-article .learn-intro { color: var(--slate); font-size: 18px; }
.learn-article a:not(.learn-tc) { text-decoration: underline; text-underline-offset: 3px; }
.learn-article a:not(.learn-tc):hover { text-decoration-thickness: 2px; }
.learn-tc { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border: 1px solid var(--ink); border-radius: 2px; color: var(--ink); font-family: var(--mono); font-size: 13px; font-weight: 700; letter-spacing: 0; vertical-align: middle; }
.learn-tc:hover { background: var(--ink); color: var(--signal); }
.learn-tc span { font-size: 10px; }
.learn-note { margin: 18px 0 0; padding: 16px 18px; border-left: 4px solid var(--ink); border-radius: 2px; background: var(--paper); }
.learn-note--signal { border-left-color: var(--signal); background: #f7ffd8; }
.learn-note--warn { border-left-color: var(--warn); background: #fff6e4; }
.learn-note b { display: block; margin-bottom: 4px; color: var(--ink); font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.learn-note p, .learn-note li { font-size: 15.5px; }
.learn-table { width: 100%; margin-top: 14px; border-collapse: collapse; font-size: 15px; }
.learn-table th, .learn-table td { padding: 10px 12px; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
.learn-table th { color: var(--slate); font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; }
.learn-table td:first-child { width: 34%; color: var(--ink); font-weight: 700; }
.learn-cheat { margin-top: 38px; padding: 24px 26px; border-radius: 4px; background: var(--ink); color: var(--paper); }
.learn-cheat h3 { margin-top: 0; color: var(--paper); }
.learn-cheat ol { gap: 10px; counter-reset: cheat; padding: 0; list-style: none; }
.learn-cheat li { display: grid; grid-template-columns: 32px 1fr; gap: 10px; color: var(--paper); counter-increment: cheat; }
.learn-cheat li::before { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--signal); color: var(--ink); font-family: var(--mono); font-size: 13px; font-weight: 700; content: counter(cheat); }

.learn-side { position: sticky; top: 92px; }
.learn-toc { padding: 18px; border: 1px solid var(--rule); border-radius: 4px; background: var(--white); }
.learn-toc h2 { margin: 2px 4px 12px; font-size: 18px; }
.learn-toc ol { display: grid; gap: 2px; padding: 0; list-style: none; }
.learn-toc a { display: grid; grid-template-columns: 30px 1fr auto; gap: 10px; align-items: center; padding: 9px 10px; border-radius: 2px; font-size: 14.5px; line-height: 1.3; }
.learn-toc a:hover { background: var(--paper); }
.learn-toc a[aria-current="page"] { background: var(--ink); color: var(--paper); }
.learn-toc small { display: block; color: var(--pending); font-family: var(--mono); font-size: 12px; }
.learn-toc__n { display: grid; place-items: center; width: 28px; height: 28px; border: 1.5px solid currentColor; border-radius: 50%; font-family: var(--mono); font-size: 13px; font-weight: 700; }
.learn-toc a[aria-current="page"] .learn-toc__n { border-color: var(--signal); background: var(--signal); color: var(--ink); }
.learn-toc__done { color: #3e8f3a; font-weight: 800; }
.learn-toc a[aria-current="page"] .learn-toc__done { color: var(--signal); }

.learn-next { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: clamp(36px, 5vw, 56px); }
.learn-next__link { display: grid; gap: 6px; padding: 22px 26px; border: 1px solid var(--rule); border-radius: 4px; background: var(--white); transition: border-color 160ms ease, transform 160ms ease; }
.learn-next__link:hover { border-color: var(--ink); transform: translateY(-2px); }
.learn-next__link span { color: var(--slate); font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; }
.learn-next__link strong { font-family: var(--display); font-size: 19px; letter-spacing: -.02em; line-height: 1.25; }
.learn-next__link--next { border-color: var(--ink); background: var(--ink); color: var(--paper); text-align: right; }
.learn-next__link--next span { color: var(--signal); }
.learn-next__link--next:hover { background: var(--ink-2); }

/* ---- Landing section «Обучение» ---- */
.learn-teaser { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; padding: 0; list-style: none; }
.learn-teaser .learn-card__body { padding: 16px 16px 18px; }
.learn-teaser .learn-card__title { font-size: 16px; }
.learn-teaser__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; margin-top: 28px; }
.learn-teaser__foot p { color: var(--slate); }

@media (max-width: 1100px) {
  .learn-stage, .learn-body { grid-template-columns: minmax(0, 1fr); }
  .learn-chapters { max-height: none; }
  .learn-chapters ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .learn-side { position: static; }
  .learn-teaser { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .learn-hero__in, .learn-part__head { grid-template-columns: minmax(0, 1fr); }
  .learn-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .learn-support { grid-template-columns: minmax(0, 1fr); }
  .learn-support__actions { justify-content: flex-start; }
}

@media (max-width: 640px) {
  .learn-grid, .learn-teaser, .learn-next, .learn-chapters ol { grid-template-columns: minmax(0, 1fr); }
  .learn-next__link--next { text-align: left; }
  .learn-player__bar { flex-wrap: wrap; gap: 2px 4px; padding: 6px 8px 8px; }
  .learn-player__track { order: -1; flex-basis: 100%; height: 32px; }
  .learn-player__time { margin-right: auto; }
  .learn-player [data-player-mute] { display: none; }
  .learn-article { padding: 22px 18px; }
  .learn-player__end .btn { min-height: 44px; padding: 10px 16px; font-size: 15px; }
  .learn-table td:first-child { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .learn-card, .learn-card__play, .learn-next__link, .learn-player__big, .learn-player__chapter-flag { transition: none; }
  .learn-card:hover, .learn-next__link:hover { transform: none; }
}

.sec--dark .learn-card { border-color: var(--rule-dark); }
.sec--dark .learn-card:hover { border-color: var(--signal); }
.sec--dark .learn-teaser__foot p { color: var(--pending); }