/* Study tools: lessons, flashcards, glossary, notes and Pregúntale. Tokens only (see style.css :root). */

/* Lessons */
.lesson-area { margin-bottom: .75rem; }
.lesson-area summary { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .25rem 1rem; cursor: pointer; font-weight: 700; min-height: 44px; align-items: center; }
.lesson-area summary { list-style: none; }
.lesson-area summary::-webkit-details-marker { display: none; }
.lesson-area summary::after { content: ""; flex: none; width: .55rem; height: .55rem; margin-left: .5rem; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform .15s var(--ease); }
.lesson-area[open] summary::after { transform: rotate(-135deg); }
.lesson-area-title { flex: 1 1 14rem; }
.lesson-area-title .tag { display: block; margin-top: .15rem; font-weight: 500; font-family: var(--mono); text-transform: uppercase; }
.lesson-area-meta { display: inline-flex; align-items: center; gap: .6rem; font-weight: 400; }
.lesson-area-meta progress { width: 5.5rem; height: .4rem; accent-color: var(--teal); }
.lesson-list { margin: .75rem 0 0; padding-left: 1.4rem; display: grid; gap: .45rem; }
.lesson-list .note { display: block; font-size: .85rem; }
.lesson-list .is-read > a { color: var(--muted); }
.lesson-body { margin: 1.5rem 0; }
.lesson-page .wrap > h2, .lesson-body h2 { font-size: 1.35rem; margin-top: 2em; }
.lesson-page h1 { font-size: clamp(1.9rem, 4.2vw, 2.6rem); max-width: 24ch; }
.lesson-body .is-current { background: var(--teal-soft); border-radius: var(--r-sm); }
.md-table { width: 100%; border-collapse: collapse; background: var(--surface); font-size: .95rem; }
.md-table th, .md-table td { padding: .5rem .65rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.ask-row { position: sticky; bottom: .75rem; z-index: 5; display: inline-flex; flex-wrap: nowrap; gap: .5rem; align-items: center; width: max-content; max-width: 100%; padding: .3rem .9rem .3rem .3rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--pill); box-shadow: var(--shadow-2); }
.ask-link { background: var(--surface); }
.ask-link.is-ready { background: var(--teal); border-color: var(--teal); color: var(--on-teal); }
.ask-hint { margin: 0; }
.key-facts th { width: 55%; font-weight: 600; }
.lesson-traps li { margin-bottom: .4rem; }
.lesson-actions { margin: 1.5rem 0; }
.lesson-cases { padding-left: 1.2rem; }
.related-lesson { font-weight: 600; }

/* Flashcards */
.flashcard { margin-top: 1rem; }
.fc-front { font-size: 1.15rem; font-weight: 600; }
.fc-back > summary { list-style: none; display: inline-block; margin: .5rem 0 1rem; }
.fc-back > summary::-webkit-details-marker { display: none; }
.fc-answers { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin: 1rem 0; }
.fc-answers .btn { width: 100%; }
kbd { font: .75rem/1 var(--mono); border: 1px solid currentColor; border-radius: 4px; padding: .1rem .3rem; opacity: .7; }
.fc-progress { margin-bottom: .3rem; color: var(--muted); font-family: var(--mono); font-size: var(--step--1); }
.fc-missed li, .notes-list li { margin-bottom: .75rem; }

/* Notes */
.notes-list { list-style: none; padding: 0; }
.note-save summary { cursor: pointer; color: var(--teal-strong); margin-top: .5rem; min-height: 44px; display: flex; align-items: center; }

/* Glossary and concepto del día */
.gloss-letters { display: flex; flex-wrap: wrap; gap: .4rem; margin: 1rem 0; }
.gloss-letters a { padding: .35rem .6rem; border: 1px solid var(--line); border-radius: var(--r-sm); text-decoration: none; min-width: 2.2rem; min-height: 2.2rem; text-align: center; font-family: var(--mono); }
.gloss-letters a[aria-current] { background: var(--teal); color: var(--on-teal); border-color: var(--teal); }
.gloss-list dt { font-weight: 700; margin-top: 1rem; }
.gloss-letter { position: sticky; top: 0; z-index: 2; background: var(--bg); padding: .5rem 0; margin: 1.5rem 0 0; font: 600 1rem/1 var(--mono); color: var(--teal); border-bottom: 1px solid var(--line); }
.gloss-practice { margin: .5rem 0 1rem; }
.gloss-list dd { margin: .2rem 0 0; color: var(--muted); }
.concept { margin: 1.5rem 0; }
.concept-term { font-size: 1.2rem; font-weight: 700; margin-bottom: .3rem; }

/* /practicar: the ways to practise */
.practice-ways { list-style: none; padding: 0; margin: 1.5rem 0 2rem; display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.practice-ways a { display: flex; align-items: center; gap: .6rem; min-height: 44px; text-decoration: none; color: var(--ink); }
.practice-ways .icon { width: 1.4rem; height: 1.4rem; color: var(--teal); flex: none; }
.practice-ways .note { margin: .25rem 0 0; }
@media (max-width: 30rem) {
  .ask-hint { display: none; }
  .ask-row { padding-right: .3rem; }
  .gloss-letters { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .gloss-letters a { min-width: 44px; min-height: 44px; flex: none; display: inline-grid; place-items: center; }
}
/* Touch screens have no keyboard: hide the shortcut keys and their hint (persona run v2, 360 px phone). */
@media (hover: none) and (pointer: coarse) { kbd, .fc-keys { display: none; } }