/* Study hub, mode pages and the /learning landing. Builds on /static/landing-edu/styles.css tokens. */
.wordmark small { margin-left: 4px; font: 500 12px/1 var(--mono); letter-spacing: .08em; color: var(--muted-dark); }

/* Tilted grid hero */
.tg-hero, .tgh { position: relative; overflow: hidden; }
/* The hub is the carousel alone: it fills the screen under the header. */
.tg-hero-full { height: max(560px, calc(100svh - 64px)) !important; border-bottom: 0; }
/* A smaller headline that sits above the tiles rather than over them. */
.tg-hero-full .tg-copy h1 { font-size: clamp(34px, 4.2vw, 60px); }
.tg-hero-full .tg-top .slate-line { margin-bottom: 10px; }
.tg-hero.tg-hero-full .tg-copy { padding-top: clamp(20px, 3.5vh, 36px); }
/* Visible only while a keyboard user is in it. */
.subject-list:not(:focus-within) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.subject-list ul { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 0; padding: 0; list-style: none; }
.subject-list a { display: inline-block; padding: 8px 12px; background: var(--ink); border: 2px solid var(--hi); color: var(--paper); text-decoration: none; }
.tg-hero { height: clamp(560px, 86vh, 760px); background: var(--ink); border-bottom: 2px solid var(--ink-3); }
.tgh-slice { background: var(--ink-2); }
/* Carousel tiles open a subject or a free lesson; the row holds still under the pointer. */
.tgh-band:hover .tgh-tile { animation-play-state: paused; }
a.tgh-tile .tgh-slice img { transition: filter .2s; }
a.tgh-tile:hover .tgh-slice img { filter: brightness(1.08) saturate(1.1); }
.tg-copy { position: relative; z-index: 1; height: 100%; display: flex; flex-direction: column; justify-content: space-between; align-items: center; padding: clamp(36px, 6vh, 64px) var(--gutter) clamp(28px, 5vh, 48px); text-align: center; pointer-events: none; }
.tg-copy > * { pointer-events: auto; }
.tg-top { max-width: 900px; }
.tg-top .slate-line { justify-content: center; display: flex; align-items: center; gap: 10px; color: var(--hi); margin-bottom: 18px; }
.tg-copy h1 { font-size: clamp(52px, 8.4vw, 116px); text-shadow: 0 2px 24px rgba(21, 19, 15, .85); }
.tg-lede { max-width: 34em; margin: 0 auto; color: var(--paper); font-size: 17px; text-shadow: 0 1px 14px rgba(21, 19, 15, .95); }
.tg-bottom { display: grid; gap: 14px; justify-items: center; }
.tg-actions { display: flex; flex-wrap: wrap; gap: 14px 20px; justify-content: center; align-items: center; }
.tg-actions .text-link { background: rgba(21, 19, 15, .7); padding: 6px 8px; }
.tg-note { font: 400 11px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted-dark); background: rgba(21, 19, 15, .7); padding: 4px 8px; }

/* Mode cards (hub) */
.modes { padding: clamp(64px, 8vw, 112px) 0; }
.mode-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin: 0; padding: 0; list-style: none; border-top: 2px solid var(--ink); border-left: 2px solid var(--ink); }
.mode-card { border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }
.mode-card a { display: grid; height: 100%; grid-template-rows: auto 1fr; text-decoration: none; color: var(--ink); transition: background-color .15s; }
.mode-card a:hover { background: var(--hi); color: var(--ink); }
.mode-card img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-bottom: 2px solid var(--ink); }
.mode-card .mode-body { padding: 20px 22px 24px; display: grid; gap: 10px; align-content: start; }
.mode-card .mode-kicker { font: 500 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--pen); }
.mode-card h3 { font-size: clamp(30px, 3vw, 42px); }
.mode-card p { font-size: 16px; color: var(--muted-light); }
.mode-card .go { font-weight: 600; color: var(--ink); }
.mode-card-feature { grid-column: 1 / -1; }
.mode-card-feature a { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr; }
.mode-card-feature a { min-height: clamp(300px, 30vw, 420px); }
.mode-card-feature img { height: 100%; aspect-ratio: auto; border-bottom: 0; border-right: 2px solid var(--ink); }
.mode-card-feature .mode-body { align-content: center; padding: 28px clamp(22px, 3vw, 44px); }
.mode-card-feature h3 { font-size: clamp(44px, 5vw, 76px); }
.badge { display: inline-flex; align-items: center; gap: 6px; width: max-content; padding: 4px 8px; font: 500 10px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; border: 2px solid var(--ink); background: var(--paper); color: var(--ink); }
.badge-free { background: var(--hi); }
.badge-pro { background: var(--ink); color: var(--hi); }
.badge-open { background: var(--teal); }
.badge svg { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 2; }

/* How a lesson works */
.steps { padding: clamp(64px, 8vw, 104px) 0; }
.steps .section-head h2 { color: var(--paper); }
.step-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 2px solid var(--paper); margin: 0; padding: 0; list-style: none; counter-reset: step; }
.step-grid li { padding: 24px 24px 8px 0; }
.step-grid li + li { padding-left: 24px; border-left: 1px solid var(--ink-3); }
.step-grid b { display: block; margin-bottom: 10px; font: 500 11px/1 var(--mono); letter-spacing: .08em; color: var(--hi); }
.step-grid h3 { font-size: clamp(26px, 2.4vw, 34px); margin-bottom: 10px; }
.step-grid p { color: var(--muted-dark); font-size: 16px; }

/* Module list (mode page) */
.module-list { margin: 0; padding: 0; list-style: none; border-top: 2px solid var(--ink); }
.module { border-bottom: 1px solid var(--ink); scroll-margin-top: 80px; }
.module-head > button { scroll-margin-top: 80px; }
.module-head { font: inherit; text-transform: none; }
.module-head > button { width: 100%; display: grid; grid-template-columns: 64px 200px 1fr auto; gap: 24px; align-items: center; padding: 18px 0; border: 0; background: none; color: var(--ink); text-align: left; }
.module-head > button:hover, .module-head > button[aria-expanded="true"] { background: rgba(238, 240, 74, .35); }
.module-num { font: 900 44px/1 var(--display); color: var(--pen); }
.module img { width: 200px; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border: 2px solid var(--ink); }
.module-text { display: grid; gap: 8px; }
.module-title { font: 900 clamp(26px, 2.6vw, 36px)/.95 var(--display); text-transform: uppercase; }
.module-summary { font: 400 16px/1.45 var(--body); color: var(--muted-light); }
.module-meta { display: grid; gap: 8px; justify-items: end; font: 400 11px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted-light); }
.module-panel { padding: 4px 0 28px 88px; }
.module-panel[hidden] { display: none; }
.lesson-list { margin: 0 0 18px; padding: 0; list-style: none; counter-reset: lesson; border-top: 1px dashed var(--muted-light); }
.lesson-list li { counter-increment: lesson; border-bottom: 1px dashed var(--muted-light); }
.lesson-list a { display: flex; align-items: center; gap: 14px; padding: 12px 4px; font-size: 16px; text-decoration: none; color: var(--ink); }
.lesson-list a::before { content: counter(lesson, decimal-leading-zero); font: 500 12px/1.6 var(--mono); color: var(--pen); }
.lesson-list a:hover { background: var(--hi); }
.lesson-name { flex: 1; }
.lesson-meta { display: flex; align-items: center; gap: 12px; font: 400 11px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted-light); }
.mode-aside { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; margin-top: 28px; font-size: 15px; color: var(--muted-light); }
.mode-aside a { font-weight: 600; }

/* Learning landing extras */
.module-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); margin: 0; padding: 0; list-style: none; border-top: 2px solid var(--ink); border-left: 2px solid var(--ink); }
.module-grid li { border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink); display: grid; grid-template-rows: auto 1fr; }
.module-grid img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-bottom: 2px solid var(--ink); }
.module-grid div { padding: 14px 14px 18px; display: grid; gap: 8px; align-content: start; }
.module-grid b { font: 500 11px/1 var(--mono); color: var(--pen); }
.module-grid h3 { font-size: 22px; line-height: 1; }
.disclaimer { margin-top: 22px; font-size: 13px; color: var(--muted-light); }

/* Lesson page */
.lesson-page { padding: clamp(32px, 5vw, 64px) 0 clamp(64px, 8vw, 104px); }
.lesson-layout { display: grid; grid-template-columns: 260px minmax(0, 720px); gap: clamp(32px, 5vw, 72px); justify-content: center; align-items: start; }
.lesson-outline { position: sticky; top: 88px; }
.lesson-outline .kicker { margin-bottom: 10px; }
.outline-class { font: 900 24px/1 var(--display); text-transform: uppercase; margin-bottom: 16px; }
.outline-class a { text-decoration: none; }
.lesson-outline ol { margin: 0; padding: 0; list-style: none; border-top: 2px solid var(--ink); }
.lesson-outline li { border-bottom: 1px solid var(--paper-2); }
.lesson-outline ol a { display: grid; grid-template-columns: 28px 1fr; gap: 6px 8px; padding: 10px 2px; font-size: 14px; line-height: 1.35; text-decoration: none; color: var(--ink); }
.lesson-outline ol a .badge { grid-column: 2; }
.lesson-outline ol a:hover { background: rgba(238, 240, 74, .45); }
.lesson-outline li.current a { background: var(--ink); color: var(--paper); }
.outline-n { font: 500 11px/1.6 var(--mono); color: var(--pen); }
.lesson-outline li.current .outline-n { color: var(--hi); }
.outline-note { margin-top: 14px; font-size: 13px; color: var(--muted-light); }
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; font: 400 11px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted-light); }
.crumbs a { text-decoration: none; }
.lesson-cover { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border: 2px solid var(--ink); margin-bottom: 24px; }
.lesson-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; margin-bottom: 14px; font: 400 11px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted-light); }
.lesson h1 { font-size: clamp(40px, 5.4vw, 68px); line-height: .94; }
.lesson-summary { margin-top: 16px; font-size: 19px; color: var(--muted-light); }
.lesson-body { margin-top: 32px; font-size: 18px; line-height: 1.7; }
.lesson-body > p, .lesson-body > ul { margin: 0 0 18px; }
.lesson-body h2 { margin: 36px 0 14px; font-size: clamp(28px, 3vw, 38px); }
.lesson-body ul { padding-left: 22px; }
.lesson-body li { margin-bottom: 8px; }
.lesson-body strong { background: linear-gradient(transparent 60%, rgba(238, 240, 74, .7) 60%); font-weight: 600; }
.lesson-body code { font: 400 .86em var(--mono); background: var(--paper-2); padding: 1px 5px; }
.lesson-example { margin: 22px 0; padding: 18px 20px; border: 2px solid var(--ink); border-left-width: 8px; border-left-color: var(--pen); background: #fbf8f1; font-size: 16.5px; }
.lesson-example p { margin: 0 0 8px; }
.lesson-example p:first-child { font: 500 11px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--pen); }
.lesson-tip { margin: 22px 0; padding: 16px 20px; background: var(--hi); border: 2px solid var(--ink); font-size: 16.5px; }
.lesson-tip b { display: block; margin-bottom: 6px; font: 500 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.lesson-tip p { margin: 0 0 6px; }
.lesson-code { margin: 22px 0; padding: 16px 18px; overflow-x: auto; background: var(--ink); color: var(--paper); font: 400 14px/1.6 var(--mono); }
.lesson-code code { background: none; padding: 0; color: inherit; }
.lesson-section { margin-top: 44px; padding-top: 28px; border-top: 2px solid var(--ink); }
.lesson-takeaways { padding-left: 22px; }
.practice-q { margin: 0 0 22px; padding: 20px; border: 2px solid var(--ink); background: #fbf8f1; }
.practice-n { font: 500 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--pen); margin-bottom: 10px; }
.practice-q h3 { font: 600 18px/1.4 var(--body); text-transform: none; margin-bottom: 12px; }
.practice-q fieldset { margin: 0 0 14px; padding: 0; border: 0; display: grid; gap: 8px; }
.practice-q label { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border: 1px solid var(--paper-2); background: var(--paper); font-size: 16px; line-height: 1.45; cursor: pointer; }
.practice-q label:hover { border-color: var(--ink); }
.practice-q input { margin-top: 4px; accent-color: var(--pen); }
.practice-q label.right { border: 2px solid #1d7a4a; background: #e3f4ea; }
.practice-q label.wrong { border: 2px solid var(--red); background: #fbe5e1; }
.practice-feedback { margin-top: 12px; font-size: 16px; }
.practice-verdict { font-weight: 600; margin-bottom: 4px; }
.btn-ink { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-ink:hover { background: var(--pen); border-color: var(--pen); }
.lesson-teaser { position: relative; max-height: 220px; overflow: hidden; }
.lesson-teaser::after { content: ""; position: absolute; inset: auto 0 0; height: 120px; background: linear-gradient(transparent, var(--paper)); }
.paywall { margin-top: 12px; padding: clamp(22px, 4vw, 36px); background: var(--ink); color: var(--paper); border: 2px solid var(--ink); }
.paywall .kicker { color: var(--hi); }
.paywall h2 { font-size: clamp(36px, 4.4vw, 56px); margin-bottom: 14px; }
.paywall p { font-size: 17px; }
.paywall-note { margin-top: 8px; color: var(--muted-dark); font-size: 15px !important; }
.paywall-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 22px; margin-top: 22px; }
.lesson-next { margin-top: 40px; }
.lesson-next .btn { max-width: 100%; }
.lesson-foot { margin-top: 32px; font-size: 13px; color: var(--muted-light); }
.module-grid a { display: grid; grid-template-rows: auto 1fr; height: 100%; text-decoration: none; color: var(--ink); }
.module-grid a:hover { background: var(--hi); }

@media (max-width: 1020px) {
  .lesson-layout { grid-template-columns: minmax(0, 1fr); }
  .lesson-outline { position: static; order: 2; }
  .mode-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mode-card-feature { grid-column: 1 / -1; }
  .module-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .step-grid { grid-template-columns: 1fr 1fr; }
  .step-grid li:nth-child(3) { padding-left: 0; border-left: 0; }
  .module-head > button { grid-template-columns: 48px 150px 1fr; }
  .module img { width: 150px; }
  .module-meta { grid-column: 3; justify-items: start; }
  .module-panel { padding-left: 0; }
}
@media (max-width: 760px) {
  .lesson-body { font-size: 17px; }
  .lesson-meta span:last-child { display: none; }
  .tg-hero { height: clamp(560px, 92svh, 700px); }
  .tg-lede { background: rgba(21, 19, 15, .78); padding: 8px 10px; font-size: 15.5px; }
  .mode-grid { grid-template-columns: 1fr; }
  .mode-card-feature { grid-column: auto; }
  .mode-card-feature a { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .mode-card-feature img { aspect-ratio: 16 / 9; height: auto; border-right: 0; border-bottom: 2px solid var(--ink); }
  .module-grid { grid-template-columns: 1fr 1fr; }
  .step-grid { grid-template-columns: 1fr; }
  .step-grid li, .step-grid li + li { padding: 20px 0 8px; border-left: 0; }
  .step-grid li + li { border-top: 1px solid var(--ink-3); }
  .module-head > button { grid-template-columns: 1fr; gap: 12px; }
  .module img { width: 100%; }
  .module-num { font-size: 34px; }
  .module-meta { grid-column: auto; justify-items: start; }
}