/* learn.css — the free A1 web lesson player (PROTOTYPE, 2026-10-10). Builds on /css/styles.css and keeps its
   WCAG 2.1 AA rules: text in --ink / --ink-muted / --accent-text, white text only on --button, every control's
   boundary ≥ 3:1 against its background, 44px touch targets, logical properties so RTL needs no second sheet.
   Contrast (measured against --card #FBF6EC): ink 14.9, ink-muted 6.0, accent-text 5.9, control border #6b5c50 6.0 (6.4 on white),
   correct text #1F4D2A on #E3EFE4 8.2, wrong text #8A2B12 on #FBE7E0 7.2, white on --button 5.3, accent-text on the picked #FBE3D6 5.2. */

.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }

.learn { max-width: 720px; margin: 0 auto; padding: 28px 16px 56px; }
.learn-loading { padding: 48px 0; text-align: center; color: var(--ink-muted); }
.learn h1 { font-size: clamp(28px, 6vw, 38px); line-height: 1.15; letter-spacing: -.5px; margin-block: 4px 10px; }
.learn h2 { font-size: 22px; line-height: 1.3; margin-block: 2px 12px; }
.learn h3 { font-size: 17px; margin-block: 18px 8px; }
.learn h4 { font-size: 17px; line-height: 1.35; }
.learn h1:focus, .learn h2:focus { outline: none; }
.learn h1:focus-visible, .learn h2:focus-visible { outline: 3px solid var(--accent-text); outline-offset: 4px; }
.learn p { margin-block: 0 10px; }

.learn-hero { margin-block-end: 22px; }
.learn-eyebrow { font-size: 13px; font-weight: 700; letter-spacing: .4px; text-transform: uppercase; color: var(--accent-text); margin-block-end: 4px; }
.learn-lead { font-size: 18px; color: var(--ink-soft); }
.learn-muted { color: var(--ink-muted); }
.learn-small { font-size: 15px; }
.learn-label { font-size: 14px; font-weight: 700; color: var(--ink-muted); text-transform: none; margin-block-end: 6px; }
.learn-subhead { display: flex; flex-wrap: wrap; gap: 4px 6px; align-items: baseline; }
.learn-subhead .learn-muted { font-weight: 500; font-size: 15px; }

.learn-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; margin-block-end: 18px; box-shadow: 0 1px 2px rgba(42, 31, 26, .05); }
.learn-cta { text-align: center; }
.learn-cta .store-badges { justify-content: center; margin-top: 8px; }

/* The language picker: navigates only on its button (WCAG 3.2.2), like the tutorial's. */
.learn-lang { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; margin-top: 14px; }
.learn-lang label { font-weight: 700; }
.learn-lang select { min-height: 44px; padding: 8px 12px; border: 1.5px solid var(--ink-muted); border-radius: 10px; background: #fff; color: var(--ink); font: inherit; }

.learn-lessons { list-style: none; display: grid; gap: 12px; margin-top: 8px; }
.learn-lesson { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 16px; padding: 14px 0; border-top: 1px solid var(--line); }
.learn-lesson-text { flex: 1 1 260px; }
.learn-lesson-text p { margin-block: 4px 0; }
.learn-best { font-weight: 700; color: #1F4D2A; font-size: 15px; }

.learn-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 22px; border-radius: 999px; border: 2px solid var(--button); background: var(--button); color: #fff; font: inherit; font-weight: 700; cursor: pointer; }
.learn-btn:hover { background: var(--button-hover); border-color: var(--button-hover); }
.learn-btn:disabled { opacity: .45; cursor: not-allowed; }
.learn-btn-secondary { background: transparent; color: var(--accent-text); border-color: var(--accent-text); }
.learn-btn-secondary:hover { background: rgba(160, 66, 31, .08); color: var(--accent-text-hover); }
.learn-link { min-height: 44px; padding: 8px 0; border: 0; background: none; color: var(--accent-text); font: inherit; font-weight: 700; cursor: pointer; }
.learn-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.learn-backbar { margin-block-end: 6px; }

.learn-es { font-size: 19px; font-weight: 600; color: var(--ink); }
.learn-examples ul, .learn-vocab { list-style: none; display: grid; gap: 12px; }
.learn-examples li { padding-inline-start: 12px; border-inline-start: 3px solid var(--gold); }
.learn-examples li p { margin: 0; }
.learn-word { padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.learn-word-es { font-size: 22px; font-weight: 700; margin-block-end: 2px; }
.learn-word-en { font-weight: 600; color: var(--ink-soft); }
.learn-word-example { font-size: 15px; }

.learn-progress { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; margin-block-end: 10px; }
.learn-progress p { margin: 0; }
.learn-progress progress { flex: 1 1 160px; height: 10px; accent-color: var(--button); }
.learn-chip { display: inline-block; padding: 3px 10px; border-radius: 999px; background: #F2E4CC; color: var(--ink); font-size: 14px; font-weight: 700; }
.learn-chip-retry { margin-block-end: 10px; }

.learn-choices { display: grid; gap: 10px; margin-top: 8px; }
.learn-choice { min-height: 48px; padding: 10px 14px; border: 1.5px solid var(--ink-muted); border-radius: 12px; background: #fff; color: var(--ink); font: inherit; font-size: 18px; text-align: start; cursor: pointer; }
.learn-choice:hover:not(:disabled) { background: #FFF7EE; }
.learn-choice:disabled { cursor: default; }
.learn-choice.is-picked, .learn-choice[aria-pressed="true"] { border: 2.5px solid var(--accent-text); background: #FBE3D6; }
.learn-choice.is-matched { border-color: #2F6B3C; background: #E3EFE4; color: #1F4D2A; opacity: 1; }
.learn-choice.is-miss { border-color: #8A2B12; background: #FBE7E0; }

.learn-match { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 8px; }
.learn-match-col { display: grid; gap: 10px; align-content: start; }
@media (max-width: 380px) { .learn-match .learn-choice { font-size: 16px; padding: 8px 10px; } }

.learn-sentence { font-size: 21px; margin-block: 6px 12px; }
.learn-blank { display: inline-block; min-width: 3.5em; border-bottom: 2.5px solid var(--accent-text); color: var(--accent-text); text-align: center; }

.learn-dialogue { display: grid; gap: 8px; margin-block: 10px 14px; }
.learn-line { padding: 10px 14px; border-radius: 12px; background: #fff; border: 1px solid var(--line); }
.learn-line p { margin: 0; }
.learn-speaker { font-size: 13px; font-weight: 700; color: var(--accent-text); }

.learn-tiles { display: flex; flex-wrap: wrap; gap: 8px; min-height: 56px; padding: 8px; align-content: flex-start; }
.learn-answer-row { border-bottom: 2px solid var(--ink-muted); margin-block-end: 10px; }
.learn-tile { min-height: 44px; padding: 8px 14px; border: 1.5px solid var(--ink-muted); border-radius: 10px; background: #fff; color: var(--ink); font: inherit; font-size: 18px; cursor: pointer; }
.learn-tile:hover:not(:disabled) { background: #FFF7EE; }

.learn-input { width: 100%; min-height: 48px; padding: 10px 14px; border: 1.5px solid var(--ink-muted); border-radius: 12px; background: #fff; color: var(--ink); font: inherit; font-size: 19px; }
.learn-input:focus-visible { outline: 3px solid var(--accent-text); outline-offset: 2px; }
.learn-accents { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.learn-accent { min-width: 44px; min-height: 44px; border: 1.5px solid var(--ink-muted); border-radius: 10px; background: #fff; color: var(--ink); font: inherit; font-size: 19px; cursor: pointer; }

.learn-feedback { margin-top: 16px; padding: 14px 16px; border-radius: 12px; }
.learn-feedback p { margin: 0 0 4px; }
.learn-feedback-title { font-weight: 800; font-size: 18px; }
.learn-feedback-answer { font-size: 19px; font-weight: 600; }
.learn-feedback.is-correct { background: #E3EFE4; color: #1F4D2A; }
.learn-feedback.is-wrong { background: #FBE7E0; color: #8A2B12; }

.learn-result { text-align: center; }
.learn-result .learn-actions { justify-content: center; }
.learn-score { font-size: 56px; font-weight: 800; line-height: 1.1; color: var(--accent-text); margin: 8px 0 12px; }
.learn-score.is-pass { color: #1F4D2A; }
.learn-note { padding: 10px 14px; border-radius: 12px; background: #F2E4CC; }

@media (prefers-reduced-motion: no-preference) {
  .learn-choice, .learn-tile { transition: background-color .15s ease, border-color .15s ease; }
}

/* ---------- the full version (2026-10-10): landing unit list, unit header, leave dialog, conjugation chips ---------- */
.learn-units { list-style: none; display: grid; gap: 4px; margin-top: 4px; }
.learn-unit { padding: 14px 0; border-top: 1px solid var(--line); }
.learn-unit:first-child { border-top: 0; }
.learn-unit h3 { margin: 2px 0 4px; font-size: 19px; }
.learn-unit h3 a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent-text); text-underline-offset: 3px; }
.learn-unit h3 a:hover { color: var(--accent-text); }
.learn-unit p { margin-block: 0 4px; }
.learn-unit .learn-eyebrow { margin-block-end: 0; }
.learn-lesson-titles { color: var(--ink-muted); }
.learn-unit-title { font-size: clamp(24px, 5vw, 30px); }
.learn h2.learn-subhead { font-size: 17px; }

.learn-dialog { margin: auto; max-width: min(420px, calc(100vw - 32px)); padding: 22px 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); color: var(--ink); }
.learn-dialog::backdrop { background: rgba(42, 31, 26, .45); }
.learn-dialog h2 { font-size: 20px; margin: 0 0 8px; }

.learn-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-block: 4px 12px; }
.learn-chip-verb { background: #FBE3D6; color: var(--ink); font-size: 16px; }
.learn-chip-tense { background: #F2E4CC; color: var(--ink); font-size: 16px; }
.learn-chip-person { background: #E3EFE4; color: #1F4D2A; font-size: 16px; }
.learn h2.learn-label { font-size: 14px; margin-block: 0 6px; }
/* The player paints "Loading the lesson…" and then fills in from /learn/data/. Until 1.4.0's site fix the footer sat in
   the first viewport and the lesson pushed it down: a layout shift of 0.14 in the lab (desktop) and 0.40 at p75 for real
   visitors (Web Analytics, 2026-10-17). Reserving a full viewport keeps the footer below the fold from the first paint. */
.learn-main { min-height: 100vh; }