/* Curso de IA — layout + reading styles (extends /assets/base.css) */

body { overflow-x: hidden; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 0.9rem;
  height: 58px; padding: 0 1rem;
  background: rgba(10, 10, 15, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
}
.topbar .menu-btn {
  display: none; background: none; border: 1px solid var(--border);
  color: var(--fg); width: 38px; height: 38px; border-radius: 9px; cursor: pointer; font-size: 1.1rem;
}
.topbar .crumb { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; white-space: nowrap; }
.topbar .crumb a { color: var(--fg); }
.topbar .crumb .sep { color: var(--muted-2); }
.topbar .crumb .cur { color: var(--muted); }
.topbar .bar-wrap { flex: 1; display: flex; align-items: center; gap: 0.6rem; max-width: 380px; margin-left: auto; }
.topbar .bar-wrap .progress { flex: 1; height: 7px; }
.topbar .bar-wrap .pct { font-size: 0.78rem; color: var(--muted); min-width: 3ch; text-align: right; }
.topbar .home-link { font-size: 0.82rem; }

/* ---------- layout ---------- */
.layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); align-items: start; }
.scrim { display: none; }

/* ---------- sidebar / TOC ---------- */
.toc {
  position: sticky; top: 58px; align-self: start;
  height: calc(100dvh - 58px); overflow-y: auto;
  border-right: 1px solid var(--border-soft);
  padding: 1.25rem 0.75rem 3rem;
  scrollbar-width: thin;
}
.toc .toc-title { font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-2); padding: 0 0.75rem; margin-bottom: 0.75rem; }
.toc a.ov { display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 0.75rem; border-radius: 8px; color: var(--fg-dim); font-size: 0.9rem; }
.toc a.ov:hover { background: var(--bg-elev); text-decoration: none; }
.toc a.ov.active { background: var(--bg-elev-2); color: var(--fg); }

.toc .mod { margin-top: 0.35rem; }
.toc .mod > .mod-head {
  display: flex; align-items: center; gap: 0.55rem; width: 100%;
  padding: 0.5rem 0.75rem; border-radius: 8px; cursor: pointer;
  background: none; border: none; color: var(--fg-dim); font-family: var(--font-mono); font-size: 0.86rem; text-align: left;
}
.toc .mod > .mod-head:hover { background: var(--bg-elev); }
.toc .mod.active > .mod-head { background: var(--bg-elev-2); color: var(--fg); }
.toc .mod .m-ico { font-size: 0.95rem; width: 1.2rem; text-align: center; }
.toc .mod .m-name { flex: 1; line-height: 1.35; }
.toc .mod .m-check { font-size: 0.72rem; color: var(--muted-2); }
.toc .mod .m-check.done { color: var(--success); }

.toc .lessons { list-style: none; margin: 0.15rem 0 0.4rem; padding-left: 0.4rem; }
.toc .lessons li a {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.35rem 0.75rem 0.35rem 1.6rem; border-radius: 7px;
  color: var(--muted); font-size: 0.8rem; line-height: 1.35;
  border-left: 2px solid var(--border-soft); margin-left: 0.85rem;
}
.toc .lessons li a:hover { background: var(--bg-elev); color: var(--fg-dim); text-decoration: none; }
.toc .lessons li a.active { color: var(--fg); border-left-color: var(--accent); }
.toc .lessons li a .tick { width: 14px; height: 14px; flex: none; border-radius: 4px; border: 1px solid var(--border); display: inline-grid; place-items: center; font-size: 9px; }
.toc .lessons li a .tick.done { background: var(--success); border-color: var(--success); color: #04150a; }

/* ---------- main content ---------- */
.view { padding: clamp(1.5rem, 4vw, 3rem) clamp(1rem, 5vw, 3.5rem); min-height: calc(100dvh - 58px); }
.view-inner { max-width: 760px; margin: 0 auto; }

/* overview */
.ov-hero h1 { font-size: clamp(2rem, 6vw, 3.1rem); letter-spacing: -0.04em; line-height: 1.05; }
.ov-hero h1 b { color: var(--accent); }
.ov-hero .sub { color: var(--muted); margin-top: 0.9rem; font-size: 1.02rem; max-width: 42rem; }
.ov-progress { margin: 2rem 0; padding: 1.25rem 1.35rem; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); }
.ov-progress .row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 0.8rem; }
.ov-progress .row .big { font-size: 1.05rem; font-weight: 700; }
.ov-progress .row .muted { color: var(--muted); font-size: 0.85rem; }
.ov-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.1rem; }

.mod-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 0.9rem; margin-top: 1.75rem; }
.mod-card {
  position: relative; display: flex; flex-direction: column; gap: 0.5rem;
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.15rem 1.15rem 1.25rem; transition: border-color .16s, transform .16s;
}
.mod-card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.mod-card .top { display: flex; align-items: center; gap: 0.6rem; }
.mod-card .top .ico { font-size: 1.4rem; }
.mod-card .top .num { margin-left: auto; font-size: 0.72rem; color: var(--muted-2); }
.mod-card h3 { font-size: 1rem; color: var(--fg); letter-spacing: -0.01em; line-height: 1.25; }
.mod-card p { font-size: 0.82rem; color: var(--muted); flex: 1; }
.mod-card .mc-foot { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.35rem; }
.mod-card .mc-foot .progress { flex: 1; height: 6px; }
.mod-card .mc-foot .n { font-size: 0.72rem; color: var(--muted); white-space: nowrap; }
.mod-card.complete { border-color: rgba(55,214,122,.4); }
.mod-card.complete .top .ico::after { content: " ✓"; color: var(--success); }

/* module view */
.mod-view header.mh { border-bottom: 1px solid var(--border-soft); padding-bottom: 1.2rem; margin-bottom: 0.5rem; }
.mod-view header.mh .eyebrow { font-size: 0.75rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-2); }
.mod-view header.mh h1 { font-size: clamp(1.7rem, 5vw, 2.5rem); letter-spacing: -0.03em; margin-top: 0.4rem; line-height: 1.1; }
.mod-view header.mh h1 .e { margin-right: 0.5rem; }
.mod-view header.mh .sub { color: var(--muted); margin-top: 0.6rem; }

.lesson { padding: 2rem 0; border-bottom: 1px solid var(--border-soft); scroll-margin-top: 72px; }
.lesson > .lh { display: flex; align-items: flex-start; gap: 0.8rem; margin-bottom: 0.4rem; }
.lesson > .lh .lh-main { flex: 1; }
.lesson > .lh .l-num { font-size: 0.75rem; color: var(--accent-soft); font-weight: 700; letter-spacing: 0.05em; }
.lesson > .lh h2 { font-size: 1.5rem; letter-spacing: -0.02em; line-height: 1.2; margin-top: 0.15rem; }
.lesson > .lh .mins { font-size: 0.75rem; color: var(--muted-2); margin-top: 0.35rem; }

/* reading body: readable sans-serif */
.lesson-body { font-family: var(--font-sans); color: var(--fg-dim); font-size: 1.02rem; line-height: 1.72; }
.lesson-body > * + * { margin-top: 1rem; }
.lesson-body h3 { font-family: var(--font-mono); color: var(--fg); font-size: 1.15rem; letter-spacing: -0.01em; margin-top: 1.8rem; }
.lesson-body h4 { font-family: var(--font-mono); color: var(--fg); font-size: 1rem; margin-top: 1.4rem; }
.lesson-body strong { color: var(--fg); }
.lesson-body ul, .lesson-body ol { padding-left: 1.4rem; }
.lesson-body li + li { margin-top: 0.35rem; }
.lesson-body a { text-decoration: underline; text-underline-offset: 2px; }
.lesson-body code { font-family: var(--font-mono); font-size: 0.88em; background: var(--bg-elev-2); border: 1px solid var(--border-soft); padding: 0.1em 0.4em; border-radius: 5px; color: var(--accent-soft); }
.lesson-body blockquote { border-left: 3px solid var(--border); padding-left: 1rem; color: var(--muted); font-style: italic; }

.lesson-body table { width: 100%; border-collapse: collapse; font-size: 0.9rem; font-family: var(--font-mono); display: block; overflow-x: auto; }
.lesson-body th, .lesson-body td { border: 1px solid var(--border); padding: 0.55rem 0.7rem; text-align: left; vertical-align: top; }
.lesson-body th { background: var(--bg-elev); color: var(--fg); }

.lesson-body pre.sample {
  font-family: var(--font-mono); font-size: 0.86rem; line-height: 1.55;
  background: var(--bg-elev-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 0.9rem 1rem; overflow-x: auto; white-space: pre-wrap; color: var(--fg-dim);
}

/* callouts — full soft-colored border + faint tint per type (no side-tab) */
.lesson-body .note { border: 1px solid var(--border); background: var(--bg-elev); border-radius: 11px; padding: 0.9rem 1.05rem; }
.lesson-body .note p { margin: 0; }
.lesson-body .note p + p { margin-top: 0.5rem; }
.lesson-body .note::before { display: block; font-family: var(--font-mono); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 0.4rem; }
.lesson-body .note--tip { border-color: rgba(124, 92, 255, 0.4); background: rgba(124, 92, 255, 0.06); }
.lesson-body .note--tip::before { content: "💡 Consejo"; color: var(--accent-soft); }
.lesson-body .note--warn { border-color: rgba(255, 176, 32, 0.4); background: rgba(255, 176, 32, 0.06); }
.lesson-body .note--warn::before { content: "⚠️ Cuidado"; color: var(--warn); }
.lesson-body .note--example { border-color: rgba(70, 182, 255, 0.4); background: rgba(70, 182, 255, 0.06); }
.lesson-body .note--example::before { content: "🔎 Ejemplo"; color: var(--info); }
.lesson-body .note--try { border-color: rgba(55, 214, 122, 0.45); background: rgba(55, 214, 122, 0.07); }
.lesson-body .note--try::before { content: "✍️ Practicá"; color: var(--success); }
.lesson-body .note--info { border-color: var(--border); background: var(--bg-elev-2); }
.lesson-body .note--info::before { content: "ℹ️ Dato"; color: var(--muted); }

.lesson-body .takeaways { background: rgba(124, 92, 255, 0.07); border: 1px solid rgba(124, 92, 255, 0.25); border-radius: var(--radius); padding: 1.1rem 1.25rem; margin-top: 1.8rem; }
.lesson-body .takeaways h4 { font-family: var(--font-mono); margin: 0 0 0.6rem; color: var(--accent-soft); font-size: 0.95rem; }
.lesson-body .takeaways ul { list-style: none; padding: 0; }
.lesson-body .takeaways li { position: relative; padding-left: 1.5rem; }
.lesson-body .takeaways li + li { margin-top: 0.5rem; }
.lesson-body .takeaways li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 700; }

/* completion control */
.complete-bar { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; margin-top: 1.6rem; padding-top: 0.2rem; }
.complete-btn {
  display: inline-flex; align-items: center; gap: 0.55rem; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600; color: var(--fg);
  background: var(--bg-elev-2); border: 1px solid var(--border); padding: 0.55rem 0.95rem; border-radius: 99px;
  transition: border-color .15s, background .15s;
}
.complete-btn:hover { border-color: var(--success); }
.complete-btn .box { width: 18px; height: 18px; border-radius: 6px; border: 1.5px solid var(--muted); display: inline-grid; place-items: center; font-size: 11px; color: transparent; transition: all .15s; }
.complete-btn[aria-pressed="true"] { border-color: var(--success); color: var(--success); background: rgba(55, 214, 122, 0.08); }
.complete-btn[aria-pressed="true"] .box { background: var(--success); border-color: var(--success); color: #04150a; }

/* prev / next */
.pager { display: flex; gap: 1rem; margin: 2.5rem 0 1rem; }
.pager a { flex: 1; display: flex; flex-direction: column; gap: 0.25rem; padding: 1rem 1.15rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-elev); transition: border-color .15s, transform .15s; }
.pager a:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.pager a.next { text-align: right; }
.pager a .dir { font-size: 0.72rem; color: var(--muted-2); letter-spacing: 0.08em; text-transform: uppercase; }
.pager a .ttl { font-size: 0.92rem; color: var(--fg); }
.pager a.disabled { opacity: 0.35; pointer-events: none; }

/* toast */
.toast { position: fixed; bottom: 1.25rem; left: 50%; transform: translateX(-50%) translateY(20px); opacity: 0; background: var(--bg-elev-2); border: 1px solid var(--border); color: var(--fg); padding: 0.7rem 1.1rem; border-radius: 99px; font-size: 0.85rem; z-index: 60; transition: opacity .25s, transform .25s; pointer-events: none; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .topbar .menu-btn { display: inline-grid; place-items: center; }
  .topbar .bar-wrap { max-width: 160px; }
  .topbar .home-link { display: none; }
  .toc {
    position: fixed; top: 58px; left: 0; z-index: 45;
    width: 82vw; max-width: 320px; background: var(--bg);
    transform: translateX(-102%); transition: transform .25s ease; will-change: transform;
  }
  .toc.open { transform: translateX(0); box-shadow: var(--shadow); }
  .scrim.on { display: block; position: fixed; inset: 58px 0 0; background: rgba(0,0,0,.5); z-index: 44; }
}

/* ---------- quiz ---------- */
.quiz { margin-top: 2.75rem; padding: 1.5rem 1.5rem 1.4rem; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); }
.quiz .quiz-head { display: flex; align-items: center; gap: 0.6rem; }
.quiz .q-emoji { font-size: 1.35rem; }
.quiz .quiz-head h2 { font-size: 1.3rem; letter-spacing: -0.02em; }
.quiz .quiz-intro { color: var(--muted); font-size: 0.9rem; margin: 0.4rem 0 0.5rem; }
.quiz .q { padding: 1.15rem 0; border-top: 1px solid var(--border-soft); }
.quiz .q:first-of-type { border-top: none; }
.quiz .q-text { font-family: var(--font-sans); font-size: 1.02rem; line-height: 1.5; margin-bottom: 0.5rem; color: var(--fg); }
.quiz .q-text .q-n { color: var(--accent-soft); font-family: var(--font-mono); font-weight: 700; margin-right: 0.45rem; }
.quiz .opt { display: flex; align-items: flex-start; gap: 0.7rem; width: 100%; text-align: left; font-family: var(--font-sans); font-size: 0.95rem; line-height: 1.4; color: var(--fg-dim); background: var(--bg-elev-2); border: 1px solid var(--border); border-radius: 10px; padding: 0.65rem 0.85rem; cursor: pointer; transition: border-color 0.15s, background 0.15s; margin-top: 0.5rem; }
.quiz .opt:hover:not(:disabled) { border-color: var(--accent); }
.quiz .opt .letter { flex: none; width: 22px; height: 22px; border-radius: 6px; border: 1px solid var(--border); display: grid; place-items: center; font-family: var(--font-mono); font-size: 0.76rem; font-weight: 700; color: var(--muted); }
.quiz .opt:disabled { cursor: default; }
.quiz .opt.correct { border-color: var(--success); background: rgba(55, 214, 122, 0.1); color: var(--fg); }
.quiz .opt.correct .letter { background: var(--success); border-color: var(--success); color: #04150a; }
.quiz .opt.wrong { border-color: var(--danger); background: rgba(255, 92, 124, 0.1); color: var(--fg); }
.quiz .opt.wrong .letter { background: var(--danger); border-color: var(--danger); color: #2a0710; }
.quiz .opt.dim { opacity: 0.5; }
.quiz .explain { margin-top: 0.7rem; font-family: var(--font-sans); font-size: 0.9rem; line-height: 1.55; color: var(--muted); background: var(--bg); border: 1px solid var(--border-soft); border-radius: 9px; padding: 0.7rem 0.9rem; display: none; }
.quiz .explain.show { display: block; }
.quiz .explain b { color: var(--fg-dim); }
.quiz-score { margin-top: 1.4rem; padding-top: 1.1rem; border-top: 1px solid var(--border-soft); display: flex; align-items: center; gap: 0.7rem; flex-wrap: wrap; font-family: var(--font-mono); font-size: 0.9rem; }
.quiz-score .s-badge { font-weight: 700; color: var(--fg); }
.quiz-score .s-muted { color: var(--muted); font-size: 0.82rem; }
.quiz-score .btn { margin-left: auto; }

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