:root {
  --navy: #0F1227; --navy-deep: #080A18; --navy-raised: #171B3A; --line: #2A2F55;
  --gold-shadow: #A87F50; --gold: #C9B47B; --gold-light: #F2F0AF; --ivory: #F5F3EA; --muted: #9A9DB8;
  --bull: #3DBE8B; --bear: #E5484D;
  --metal: linear-gradient(90deg, #A87F50 0%, #E0D599 35%, #F2F0AF 50%, #DFCE92 65%, #A87F50 100%);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --radius: 2px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--navy); color: var(--ivory); font-family: "Montserrat", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
body { min-height: 100dvh; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; }
img { display: block; max-width: 100%; }
.mono { font-family: "JetBrains Mono", ui-monospace, monospace; font-weight: 700; font-variant-numeric: tabular-nums; }
.kicker { font-size: 0.7rem; letter-spacing: 0.35em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; height: 50px; padding: 0 26px; border-radius: var(--radius); font-weight: 700; font-size: 0.78rem; letter-spacing: 0.16em; text-transform: uppercase; transition: transform 0.3s var(--ease), opacity 0.3s; }
.btn:active { transform: translateY(1px); }
.btn-gold { background: var(--metal); color: var(--navy); }
.btn-ghost { border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn[disabled] { opacity: 0.5; pointer-events: none; }
:focus-visible { outline: 1px solid var(--gold); outline-offset: 3px; }
@media print { body { display: none !important; } }

/* Ingreso */
.login { min-height: 100dvh; display: grid; place-items: center; padding: 24px 16px; background: radial-gradient(ellipse at 50% 30%, rgba(201, 180, 123, 0.08), transparent 60%), var(--navy); }
.login-card { width: 100%; max-width: 440px; border: 1px solid var(--line); background: var(--navy-raised); padding: 44px 36px; border-radius: var(--radius); position: relative; }
.login-card::before { content: ""; position: absolute; top: 0; left: 0; width: 64px; height: 1px; background: var(--gold); }
.login-card img { height: 48px; width: auto; margin-bottom: 34px; }
.login h1 { font-weight: 900; text-transform: uppercase; letter-spacing: -0.02em; font-size: 1.9rem; line-height: 1; margin: 14px 0 12px; }
.login p { color: var(--muted); margin: 0 0 28px; line-height: 1.6; font-size: 0.95rem; }
.login label { display: block; font-size: 0.72rem; letter-spacing: 0.25em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; font-weight: 500; }
.login input { width: 100%; height: 56px; background: var(--navy-deep); border: 1px solid var(--line); border-radius: var(--radius); color: var(--ivory); font-family: "JetBrains Mono", monospace; font-weight: 700; font-size: 1.1rem; letter-spacing: 0.12em; text-align: center; text-transform: uppercase; padding: 0 12px; user-select: text; -webkit-user-select: text; }
.login input:focus { outline: none; border-color: var(--gold); }
.login .btn { width: 100%; margin-top: 18px; }
.msg { min-height: 22px; margin-top: 16px; font-size: 0.88rem; color: var(--bear); text-align: center; }
.msg.info { color: var(--gold); }
.login small { display: block; margin-top: 26px; color: var(--muted); font-size: 0.78rem; text-align: center; line-height: 1.6; }

/* Aula */
.top { position: sticky; top: 0; z-index: 20; height: 64px; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; border-bottom: 1px solid var(--line); background: rgba(8, 10, 24, 0.92); backdrop-filter: blur(12px); }
.top img { height: 36px; width: auto; }
.top .who { display: flex; align-items: center; gap: 18px; font-size: 0.85rem; color: var(--muted); }
.top .who b { color: var(--ivory); font-weight: 700; }
.layout { display: grid; grid-template-columns: 340px 1fr; min-height: calc(100dvh - 64px); }
.side { border-right: 1px solid var(--line); background: var(--navy-deep); overflow-y: auto; max-height: calc(100dvh - 64px); position: sticky; top: 64px; }
.progress { padding: 22px 22px 18px; border-bottom: 1px solid var(--line); }
.progress .bar { height: 2px; background: var(--line); margin-top: 12px; position: relative; }
.progress .bar span { position: absolute; inset: 0 auto 0 0; background: var(--metal); transition: width 0.6s var(--ease); }
.progress .row { display: flex; justify-content: space-between; align-items: baseline; }
.mod > button { width: 100%; text-align: left; padding: 18px 22px; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 34px 1fr auto; align-items: center; gap: 8px; }
.mod > button .n { color: var(--gold); font-size: 0.8rem; }
.mod > button strong { font-weight: 700; font-size: 0.92rem; text-transform: uppercase; letter-spacing: 0.02em; }
.mod > button small { display: block; color: var(--muted); font-size: 0.72rem; margin-top: 3px; text-transform: none; letter-spacing: 0; font-weight: 400; }
.mod ul { list-style: none; margin: 0; padding: 6px 0; display: none; border-bottom: 1px solid var(--line); }
.mod.open ul { display: block; }
.mod li button { width: 100%; text-align: left; padding: 10px 22px 10px 26px; display: grid; grid-template-columns: 32px 1fr 18px; gap: 6px; align-items: center; font-size: 0.86rem; color: var(--muted); border-left: 2px solid transparent; transition: color 0.2s, background 0.2s; }
.mod li button:hover { color: var(--ivory); background: rgba(23, 27, 58, 0.7); }
.mod li button.active { color: var(--ivory); border-left-color: var(--gold); background: var(--navy-raised); }
.mod li button .mono { font-size: 0.72rem; color: var(--line); }
.mod li button.active .mono, .mod li button.seen .mono { color: var(--gold); }
.mod li button .st { font-size: 0.8rem; }
.mod li button.seen .st::before { content: "✓"; color: var(--gold); }
.mod li button.locked { opacity: 0.45; }
.mod li button.locked .st::before { content: "·"; }

.main { padding: 28px clamp(16px, 4vw, 48px) 60px; max-width: 1180px; width: 100%; }
/* El video nunca es más alto que la pantalla: se adapta a horizontal y vertical */
.player { position: relative; width: min(100%, calc((100dvh - 120px) * 16 / 9)); margin-inline: auto; aspect-ratio: 16 / 9; background: #000; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.player iframe, .player video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #000; }
.player:fullscreen { border: 0; }
.wm { position: absolute; inset: 0; pointer-events: none; z-index: 5; overflow: hidden; }
.wm .tile { display: none; }
.wm .float { position: absolute; font-family: "JetBrains Mono", monospace; font-size: 0.7rem; letter-spacing: 0.08em; color: rgba(255, 255, 255, 0.16); transition: left 2s var(--ease), top 2s var(--ease); white-space: nowrap; }
.shield { position: absolute; inset: 0; z-index: 8; background: var(--navy-deep); display: none; place-items: center; text-align: center; padding: 24px; color: var(--muted); font-size: 0.9rem; }
.shield.on { display: grid; }
.shield b { display: block; color: var(--ivory); margin-bottom: 6px; font-size: 1rem; }
.empty { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 24px; background: radial-gradient(ellipse at center, rgba(201, 180, 123, 0.08), transparent 60%), var(--navy-deep); }
.empty img { width: 90px; opacity: 0.6; margin: 0 auto 18px; }
.empty p { color: var(--muted); margin: 0; }
.fs { position: absolute; right: 12px; bottom: 56px; z-index: 9; width: 38px; height: 38px; display: grid; place-items: center; background: rgba(8, 10, 24, 0.7); border: 1px solid var(--line); border-radius: var(--radius); font-size: 1.1rem; }
.fs:hover { border-color: var(--gold); color: var(--gold); }
.lesson-head { margin-top: 26px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 18px; }
.lesson-head h1 { font-weight: 900; text-transform: uppercase; letter-spacing: -0.01em; font-size: clamp(1.4rem, 2.6vw, 2rem); line-height: 1.05; margin: 10px 0 0; max-width: 24ch; }
.lesson-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.note { margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.82rem; line-height: 1.7; max-width: 80ch; }
.demo-banner { margin-bottom: 18px; padding: 12px 16px; border: 1px solid rgba(201, 180, 123, 0.35); color: var(--gold); font-size: 0.85rem; border-radius: var(--radius); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .side { position: static; max-height: none; border-right: 0; border-top: 1px solid var(--line); order: 2; }
  .main { order: 1; padding-top: 18px; }
  .top .who span { display: none; }
  .fs { bottom: 50px; }
}

/* Pantalla completa: el video ocupa toda la pantalla sin deformarse (barras negras si la pantalla no es 16:9) */
.player:fullscreen, .player:-webkit-full-screen { width: 100vw; height: 100vh; aspect-ratio: auto; border: 0; border-radius: 0; }
.player.is-max { position: fixed; inset: 0; z-index: 100; width: 100vw; height: 100dvh; aspect-ratio: auto; border: 0; border-radius: 0; }
.player video { object-fit: contain; }
.player:fullscreen .fs, .player.is-max .fs { bottom: 64px; right: 16px; }
.player:fullscreen .wm .float, .player.is-max .wm .float { font-size: 0.85rem; }
@media (max-width: 900px) {
  .lesson-head { flex-direction: column; }
  .lesson-actions { width: 100%; display: grid; grid-template-columns: 50px 1fr 50px; }
  .lesson-actions .btn { padding: 0 12px; }
  .top { padding: 0 14px; }
  .top img { height: 30px; }
}

/* Videos grabados en vertical (formato celular) */
.player.is-vertical { aspect-ratio: 9 / 16; width: min(100%, calc((100dvh - 120px) * 9 / 16)); }
.player.is-vertical.is-max, .player.is-vertical:fullscreen { width: 100vw; aspect-ratio: auto; }

/* Un tema visto siempre muestra su ✓, aunque su video aún no esté disponible */
.mod li button.seen .st::before { content: "✓"; color: var(--gold); }
.mod li button.seen.locked { opacity: 0.85; }

/* Certificado (barra lateral) */
.cert { padding: 18px 22px; border-bottom: 1px solid var(--line); display: grid; gap: 10px; }
.cert .row { display: flex; justify-content: space-between; align-items: baseline; }
.cert .mono { color: var(--gold); font-size: 0.85rem; }
.cert-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 0.8rem; color: var(--muted); }
.cert-steps li::before { content: "○"; margin-right: 8px; color: var(--line); }
.cert-steps li.ok { color: var(--ivory); }
.cert-steps li.ok::before { content: "✓"; color: var(--gold); }
.cert-btn { height: 42px; width: 100%; font-size: 0.7rem; text-decoration: none; }
.mod li button.ev { color: var(--gold); }
.mod li button.ev .mono { color: var(--gold); font-size: 0.95rem; }
.mod li button.ev .ev-st { font-family: "JetBrains Mono", monospace; font-size: 0.72rem; color: var(--muted); white-space: nowrap; }
.mod li button.ev.passed .ev-st { color: var(--gold); }
.mod li button.ev.active { color: var(--ivory); border-left-color: var(--gold); background: var(--navy-raised); }

/* Evaluación */
.vista-eval { max-width: 820px; }
.ev-title { font-weight: 900; text-transform: uppercase; letter-spacing: -0.01em; font-size: clamp(1.6rem, 3vw, 2.3rem); line-height: 1; margin: 12px 0 14px; }
.ev-intro, .muted-p { color: var(--muted); line-height: 1.7; margin: 0 0 26px; font-size: 0.95rem; }
.ev-intro b { color: var(--ivory); }
.ev-intro b.ok { color: var(--gold); }
.ev-form { display: grid; gap: 16px; user-select: none; }
.ev-form .q { border: 1px solid var(--line); border-radius: var(--radius); background: rgba(23, 27, 58, 0.55); padding: 20px; margin: 0; display: grid; gap: 8px; transition: border-color 0.3s; }
.ev-form legend { float: left; width: 100%; padding: 0; margin-bottom: 8px; font-weight: 700; line-height: 1.45; display: flex; gap: 12px; }
.ev-form legend .mono { color: var(--gold); font-size: 0.8rem; padding-top: 3px; }
.ev-form label { display: flex; gap: 12px; align-items: flex-start; padding: 10px 12px; border: 1px solid transparent; border-radius: var(--radius); cursor: pointer; color: var(--muted); font-size: 0.92rem; line-height: 1.5; transition: background 0.2s, color 0.2s; }
.ev-form label:hover { background: rgba(8, 10, 24, 0.6); color: var(--ivory); }
.ev-form input[type=radio] { accent-color: var(--gold); margin-top: 4px; flex-shrink: 0; }
.ev-form label:has(input:checked) { color: var(--ivory); border-color: var(--line); background: var(--navy-deep); }
.ev-form .q.bien { border-color: rgba(61, 190, 139, 0.45); }
.ev-form .q.mal { border-color: rgba(229, 72, 77, 0.6); }
.ev-form .btn { justify-self: start; }
.ev-msg { color: var(--bear); font-size: 0.9rem; min-height: 1em; }
.ev-result { display: flex; gap: 22px; align-items: center; padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--navy-raised); }
.ev-result.aprobado { border-color: var(--gold); }
.ev-result > b { font-size: 2.6rem; line-height: 1; color: var(--ivory); }
.ev-result.aprobado > b { color: var(--gold); }
.ev-result p { color: var(--muted); margin: 6px 0 14px; font-size: 0.9rem; }
.ev-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.ev-actions .btn { height: 44px; }
@media (max-width: 600px) { .ev-result { flex-direction: column; align-items: flex-start; } }