@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&family=Playfair+Display:ital,wght@0,600;0,700;1,600&display=swap');

:root {
  --ink: #10233f;
  --ink-soft: #52637a;
  --paper: #f5f8fb;
  --white: #ffffff;
  --navy: #0b2341;
  --blue: #1c67e3;
  --sky: #d7e6ff;
  --cyan: #2ed6c5;
  --gold: #d4a44a;
  --line: #dce5f0;
  --danger: #ba4856;
  --shadow: 0 24px 60px rgba(15, 37, 66, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: radial-gradient(circle at 14% -4%, #dfeaff 0, rgba(223,234,255,0) 35%), var(--paper); color: var(--ink); font-family: Manrope, Arial, sans-serif; }
button, textarea { font: inherit; }
button { cursor: pointer; }
button:focus-visible, textarea:focus-visible, video:focus-visible { outline: 3px solid rgba(46,214,197,.72); outline-offset: 3px; }
.shell { width: min(1220px, calc(100% - 40px)); margin: 0 auto; padding: 36px 0 64px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-bottom: 27px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark { width: 54px; height: 32px; flex: 0 0 auto; display: block; object-fit: contain; }
.eyebrow { margin: 0 0 5px; font-family: 'DM Mono', monospace; font-size: .68rem; font-weight: 500; letter-spacing: .12em; color: #6d7d92; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 1.04rem; letter-spacing: -.02em; }
h2, h3 { letter-spacing: -.04em; }
.pilot-badge { display: inline-flex; align-items: center; gap: 8px; color: var(--navy); background: #edf6ff; border: 1px solid #cce3fa; border-radius: 999px; padding: 9px 13px; font-size: .76rem; font-weight: 800; white-space: nowrap; }
.pilot-badge span { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(46,214,197,.16); }

.class-intro { display: flex; justify-content: space-between; align-items: end; gap: 28px; padding: 23px 26px; margin-bottom: 22px; border: 1px solid rgba(202,215,231,.78); border-radius: 22px; background: rgba(255,255,255,.72); box-shadow: 0 12px 36px rgba(15,37,66,.05); }
.class-intro h2 { margin-bottom: 8px; font: 700 clamp(1.45rem, 3vw, 2.25rem)/1.08 'Playfair Display', Georgia, serif; }
.class-intro > div:first-child > p:last-child { max-width: 690px; margin-bottom: 0; color: var(--ink-soft); font-size: .84rem; line-height: 1.6; }
.intro-meta { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; max-width: 390px; }
.meta-chip { display: inline-flex; align-items: center; min-height: 32px; padding: 7px 10px; border-radius: 999px; color: var(--navy); background: #eff5fa; border: 1px solid #d8e5f0; font: .68rem 'DM Mono', monospace; }
.meta-chip strong { margin-right: 4px; color: var(--blue); }
.muted-chip { color: var(--ink-soft); }

.lesson-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(330px, .72fr); align-items: stretch; gap: 22px; }
.lesson-card, .tutor-card, .metrics-card, .learning-map, .timeline-card { background: var(--white); border: 1px solid rgba(202,215,231,.78); box-shadow: var(--shadow); }
.lesson-card { padding: 24px; border-radius: 24px; }
.lesson-head { display: flex; justify-content: space-between; gap: 16px; align-items: start; margin-bottom: 19px; }
.lesson-head h2 { margin-bottom: 0; font: 700 clamp(1.38rem, 2.8vw, 2.05rem)/1.1 'Playfair Display', Georgia, serif; max-width: 600px; }
.duration { background: #eff4f9; color: var(--ink-soft); border-radius: 8px; padding: 7px 9px; font: 500 .7rem 'DM Mono', monospace; white-space: nowrap; }
.video-shell { border-radius: 15px; overflow: hidden; position: relative; background: #061629; box-shadow: inset 0 0 0 1px rgba(255,255,255,.09); }
.video-shell video { width: 100%; aspect-ratio: 16 / 9; display: block; object-fit: cover; }
.video-status { position: absolute; top: 14px; left: 14px; z-index: 2; color: white; background: rgba(7,25,46,.78); backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,.14); border-radius: 999px; padding: 8px 11px; display: flex; gap: 8px; align-items: center; font-size: .7rem; font-weight: 700; }
.pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(46,214,197,.15); }
.video-status[data-variant="paused"] .pulse { background: var(--gold); box-shadow: 0 0 0 4px rgba(212,164,74,.16); }
.video-status[data-variant="guided"] .pulse { background: #ffd075; box-shadow: 0 0 0 4px rgba(255,208,117,.17); animation: breathe 1.15s infinite ease-in-out; }
.guided-pause { position: absolute; z-index: 3; left: 18px; right: 18px; bottom: 64px; display: grid; grid-template-columns: auto minmax(0,1fr) auto; align-items: center; gap: 14px; padding: 13px 15px; color: white; background: linear-gradient(108deg, rgba(11,35,65,.96), rgba(13,58,91,.94)); border: 1px solid rgba(46,214,197,.48); border-radius: 14px; box-shadow: 0 18px 40px rgba(2,16,34,.34); }
.guided-pause[hidden] { display: none; }
.guided-icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; color: var(--navy); background: var(--cyan); font: 800 1rem 'DM Mono', monospace; }
.guided-copy .eyebrow { color: #a8dfe7; margin-bottom: 3px; }
.guided-copy h3 { margin-bottom: 3px; font-size: .9rem; }
.guided-copy p:last-child { margin: 0; color: #d5e8f3; font-size: .7rem; line-height: 1.45; }
.guided-actions { display: grid; grid-template-columns: auto auto; gap: 7px; align-items: center; justify-items: end; }
.pause-clock { grid-row: span 2; padding: 8px 9px; border-radius: 9px; color: #ffe0a1; background: rgba(255,255,255,.07); font: 500 .72rem 'DM Mono', monospace; }
.quiet-button, .overlay-question-button { border: 1px solid rgba(255,255,255,.22); border-radius: 8px; padding: 6px 9px; font-size: .65rem; font-weight: 800; white-space: nowrap; }
.quiet-button { color: #e3f2ff; background: rgba(255,255,255,.08); }
.overlay-question-button { color: var(--navy); background: var(--cyan); border-color: var(--cyan); }
.lesson-footer { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding-top: 17px; }
.progress-copy { color: var(--ink-soft); font: .73rem 'DM Mono', monospace; }
.progress-rail { height: 5px; margin-top: 13px; border-radius: 999px; overflow: hidden; background: #e7edf4; }
.progress-rail span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--cyan), var(--blue)); transition: width .2s linear; }
.secondary-button, .primary-button, .stop-button, .continue-button { border-radius: 10px; border: 0; padding: 11px 14px; font-size: .77rem; font-weight: 800; transition: transform .18s ease, background .18s ease, opacity .18s ease; }
.secondary-button:hover, .primary-button:hover, .continue-button:hover, .overlay-question-button:hover, .quiet-button:hover { transform: translateY(-1px); }
.secondary-button { color: var(--navy); background: #e8f1ff; }
.primary-button, .continue-button { color: white; background: var(--blue); box-shadow: 0 9px 18px rgba(28,103,227,.18); }
.stop-button { color: var(--danger); background: #fff0f2; border: 1px solid #ffd4da; }
.stop-button:disabled, .continue-button:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; }

.tutor-card { padding: 25px; border-radius: 24px; background: linear-gradient(155deg, #102b4e 0%, #0b2341 60%, #0b3151 100%); color: white; position: relative; overflow: hidden; min-width: 0; }
.tutor-card::after { content: ''; position: absolute; height: 260px; width: 260px; border: 1px solid rgba(46,214,197,.19); border-radius: 50%; right: -160px; top: -110px; box-shadow: 0 0 0 38px rgba(46,214,197,.035), 0 0 0 76px rgba(46,214,197,.025); }
.tutor-head, .tutor-intro, .state-panel, .question-form, .answer-panel { position: relative; z-index: 1; }
.tutor-head { display: flex; align-items: center; gap: 12px; }
.tutor-card .eyebrow { color: #a8c5e7; }
.tutor-head h2 { margin-bottom: 0; font: 700 1.2rem/1.1 'Playfair Display', Georgia, serif; }
.voice-orb { width: 43px; height: 43px; border-radius: 50%; background: rgba(46,214,197,.14); border: 1px solid rgba(46,214,197,.56); display: flex; align-items: center; justify-content: center; gap: 2px; }
.voice-orb i { width: 2px; border-radius: 3px; background: var(--cyan); }
.voice-orb i:nth-child(1), .voice-orb i:nth-child(5) { height: 8px; }
.voice-orb i:nth-child(2), .voice-orb i:nth-child(4) { height: 16px; }
.voice-orb i:nth-child(3) { height: 23px; }
.tutor-intro { color: #d6e4f4; font-size: .84rem; line-height: 1.65; margin: 23px 0 18px; }
.tutor-mode { display: block; min-width: 0; color: #eaf4ff; font-size: .73rem; font-weight: 800; }
.tutor-mode select { display: block; width: 100%; max-width: 100%; min-width: 0; margin-top: 8px; padding: 10px 11px; border: 1px solid rgba(255,255,255,.18); border-radius: 9px; color: var(--ink); background: #fff; font-size: .74rem; line-height: 1.25; }
.state-panel { display: flex; gap: 10px; align-items: start; padding: 12px; border-radius: 12px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.1); }
.state-dot { width: 8px; height: 8px; margin-top: 4px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(46,214,197,.14); }
.state-panel[data-state="thinking"] .state-dot, .state-panel[data-state="guided"] .state-dot { background: var(--gold); animation: breathe 1.1s infinite ease-in-out; }
.state-panel[data-state="answering"] .state-dot { background: #75aefb; animation: breathe .7s infinite ease-in-out; }
.state-panel[data-state="interrupted"] .state-dot { background: #f6a2aa; }
.state-label { font-size: .75rem; font-weight: 800; margin: 0 0 2px; }
.state-detail { margin: 0; color: #bdd1e8; font-size: .68rem; line-height: 1.45; }
.question-form { margin-top: 18px; }
.question-form label:not(.safety-check) { font-size: .73rem; font-weight: 800; color: #eaf4ff; }
.question-form textarea { width: 100%; color: var(--ink); background: white; border: 1px solid transparent; border-radius: 10px; padding: 11px; resize: vertical; margin-top: 8px; font-size: .78rem; line-height: 1.45; outline: none; }
.question-form textarea:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(46,214,197,.15); }
.form-meta { display: flex; justify-content: space-between; color: #9db8d2; font: .62rem 'DM Mono', monospace; padding: 6px 2px 0; }
.safety-check { display: flex; gap: 8px; align-items: start; margin-top: 13px; color: #cbdced; font-size: .66rem; line-height: 1.45; }
.safety-check input { margin-top: 2px; accent-color: var(--cyan); }
.form-actions { display: flex; gap: 9px; margin-top: 15px; flex-wrap: wrap; }
.answer-panel { margin-top: 18px; border-top: 1px solid rgba(255,255,255,.14); padding-top: 17px; }
.answer-panel p:not(.eyebrow) { color: #e5effa; font-size: .75rem; line-height: 1.55; margin-bottom: 10px; }
.audio-visualizer { height: 26px; display: flex; align-items: center; gap: 3px; margin-bottom: 14px; }
.audio-visualizer b { width: 3px; height: 6px; border-radius: 4px; background: var(--cyan); }
.audio-visualizer.playing b { animation: wave .8s ease-in-out infinite; }
.audio-visualizer.playing b:nth-child(2n) { animation-delay: .12s; }
.audio-visualizer.playing b:nth-child(3n) { animation-delay: .27s; }
.continue-button { width: 100%; }

.learning-map, .timeline-card, .metrics-card { margin-top: 22px; border-radius: 21px; padding: 24px 26px; }
.map-heading, .timeline-head, .metrics-header { display: flex; justify-content: space-between; align-items: end; gap: 24px; }
.map-heading h2, .timeline-head h2, .metrics-header h2 { margin-bottom: 0; font-size: 1.1rem; }
.map-heading > p, .timeline-head > p, .metrics-header > p { max-width: 440px; margin: 0; color: var(--ink-soft); font-size: .73rem; line-height: 1.55; }
.first-time-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; list-style: none; padding: 0; margin: 22px 0 0; }
.first-time-steps li { display: flex; gap: 11px; padding: 14px; background: #f8fbfd; border: 1px solid #e6edf4; border-radius: 15px; }
.first-time-steps span { display: grid; place-items: center; flex: 0 0 auto; width: 26px; height: 26px; border-radius: 50%; color: var(--navy); background: #c8f2ed; font: 600 .7rem 'DM Mono', monospace; }
.first-time-steps strong { display: block; font-size: .76rem; margin-bottom: 4px; }
.first-time-steps p { margin: 0; color: var(--ink-soft); font-size: .68rem; line-height: 1.5; }
.timeline-units { display: grid; grid-template-columns: repeat(2, 1fr); gap: 13px; margin-top: 22px; }
.unit-card { display: flex; width: 100%; gap: 13px; align-items: start; padding: 15px; border: 1px solid #e3ebf3; border-radius: 15px; background: #fbfdff; color: inherit; text-align: left; cursor: pointer; transition: border .2s ease, box-shadow .2s ease, background .2s ease, transform .18s ease; }
.unit-card:hover { border-color: rgba(46,214,197,.68); transform: translateY(-1px); }
.unit-card.active { border-color: rgba(46,214,197,.68); background: #f1fffd; box-shadow: 0 9px 20px rgba(31,168,157,.09); }
.unit-number { flex: 0 0 auto; padding-top: 2px; color: var(--blue); font: 500 .82rem 'DM Mono', monospace; }
.unit-card h3 { margin-bottom: 4px; font-size: .78rem; }
.unit-card p { margin: 0; color: var(--ink-soft); font-size: .68rem; line-height: 1.45; }
.timeline-note { margin: 15px 0 0; color: var(--ink-soft); font-size: .72rem; line-height: 1.5; }
.module-link { display: inline-flex; align-items: center; text-decoration: none; }
.metrics { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-top: 21px; }
.metric { border-left: 1px solid var(--line); padding-left: 12px; }
.metric:first-child { border-left: 0; padding-left: 0; }
.metric span { color: var(--blue); font: 500 .68rem 'DM Mono', monospace; }
.metric strong { display: block; margin: 4px 0; font-size: .9rem; }
.metric small { display: block; color: var(--ink-soft); font-size: .61rem; line-height: 1.4; }
.metric.active strong { color: var(--blue); }
.metrics-footnote { color: var(--ink-soft); margin: 18px 0 0; font-size: .68rem; }
.privacy-note { display: flex; gap: 10px; align-items: start; max-width: 900px; margin: 21px auto 0; color: #65758a; font-size: .7rem; line-height: 1.55; }
.privacy-note span { color: var(--cyan); font-size: .8rem; }
.privacy-note p { margin: 0; }
.privacy-note strong { color: var(--ink); }

@keyframes breathe { 50% { transform: scale(1.25); opacity: .65; } }
@keyframes wave { 0%, 100% { height: 6px; } 50% { height: 25px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } }
@media (max-width: 980px) { .lesson-grid { grid-template-columns: 1fr; }.first-time-steps { grid-template-columns: 1fr; }.metrics { grid-template-columns: repeat(3, 1fr); row-gap: 18px; }.metric:nth-child(4) { border-left: 0; padding-left: 0; } }
@media (max-width: 700px) { .class-intro, .map-heading, .timeline-head, .metrics-header { align-items: flex-start; flex-direction: column; }.intro-meta { justify-content: flex-start; max-width: none; }.guided-pause { left: 10px; right: 10px; bottom: 55px; grid-template-columns: auto minmax(0, 1fr); gap: 10px; padding: 11px; }.guided-actions { grid-column: 2; grid-template-columns: auto 1fr 1fr; justify-items: stretch; }.pause-clock { grid-row: auto; }.quiet-button, .overlay-question-button { padding: 7px 8px; }.guided-copy h3 { font-size: .8rem; }.guided-copy p:last-child { font-size: .64rem; } }
@media (max-width: 580px) { .shell { width: min(100% - 24px, 1220px); padding-top: 20px; }.topbar, .lesson-footer { align-items: flex-start; flex-direction: column; }.lesson-card, .tutor-card, .metrics-card, .learning-map, .timeline-card { border-radius: 18px; padding: 18px; }.metrics { grid-template-columns: repeat(2, 1fr); }.metric:nth-child(3), .metric:nth-child(5) { border-left: 0; padding-left: 0; }.lesson-head h2 { font-size: 1.35rem; }.timeline-units { grid-template-columns: 1fr; }.video-status { top: 9px; left: 9px; font-size: .61rem; }.guided-pause { bottom: 48px; }.guided-icon { display: none; }.guided-actions { grid-column: 1 / -1; }.pause-clock { justify-self: start; }.class-intro { padding: 19px; } }

/* Los avisos viven en el flujo del aula, nunca encima de la diapositiva. */
.video-status {
  position: static;
  width: fit-content;
  max-width: 100%;
  margin: 12px 0;
  color: var(--ink);
  background: #edf4fa;
  border-color: var(--line);
  backdrop-filter: none;
}
.guided-pause {
  position: static;
  margin: 12px 0 0;
  grid-template-columns: auto minmax(0, 1fr);
  box-shadow: none;
  padding: 16px;
}
.guided-actions {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 10px;
}
.guided-copy h3 { font-size: .95rem; }
.guided-copy p:last-child, #guidedInstruction {
  color: #d5e8f3;
  font-size: .78rem;
  line-height: 1.5;
  margin: 4px 0;
}
.quiet-button, .overlay-question-button { min-height: 42px; font-size: .76rem; }
.pause-clock { grid-row: auto; align-self: center; }
@media (max-width: 580px) {
  .guided-pause { grid-template-columns: minmax(0, 1fr); }
  .guided-actions { grid-column: 1; }
  .video-status { font-size: .7rem; }
}

.source-list { display: grid; gap: 8px; margin: 12px 0; }
.source-card { display: grid; gap: 4px; min-width: 0; padding: 10px 11px; border: 1px solid rgba(145, 226, 216, .25); border-radius: 10px; color: #eaf4ff; text-decoration: none; background: rgba(7, 29, 52, .42); overflow-wrap: anywhere; }
.source-card:hover, .source-card:focus-visible { border-color: #70d9cc; background: rgba(12, 56, 75, .62); }
.source-card strong { font-size: .72rem; line-height: 1.35; }
.source-card small, .source-list > p { color: #bbd1e6; font-size: .65rem; line-height: 1.4; margin: 0; }
@media (max-width: 760px) { .source-card strong { font-size: .68rem; } }
@media (max-width: 700px) {
  .shell { padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
  .tutor-mode select, .question-form textarea { font-size: 16px; }
  .form-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form-actions > button, .secondary-button { min-height: 44px; }
}
@media (max-width: 580px) {
  .form-actions { grid-template-columns: 1fr; }
}

/* Controles aditivos: aviso inmediatamente encima del video, nunca superpuesto. */
.pause-hint { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin: 0 0 12px; padding: 10px 12px; border: 1px solid #bddfd9; border-radius: 12px; background: #effaf7; color: var(--ink); }
.pause-hint[hidden] { display: none; }
.pause-hint-copy { min-width: 0; }
.pause-hint strong { display: block; font-size: .78rem; line-height: 1.4; }
.pause-hint small { display: block; color: var(--ink-soft); font-size: .69rem; line-height: 1.4; }
.pause-hint-actions { display: flex; flex: 0 0 auto; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.pause-hint button { flex-shrink: 0; min-height: 44px; }
.pause-hint .primary-button, .pause-hint .secondary-button, .pause-hint .quiet-button { padding: 9px 11px; font-size: .7rem; }
.dictation-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
.mic-button { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 10px 12px; border: 1px solid rgba(46,214,197,.5); border-radius: 10px; background: rgba(46,214,197,.12); color: #e8fffa; font-size: .76rem; font-weight: 800; }
.mic-button[data-listening="true"] { border-color: #ffbcc2; background: #713541; }
.dictation-controls p { flex: 1 1 170px; margin: 0; color: #d0e0ef; font-size: .7rem; line-height: 1.5; }
@media (max-width: 580px) {
  .pause-hint { align-items: flex-start; flex-direction: column; }
  .pause-hint-actions { width: 100%; justify-content: stretch; }
  .pause-hint-actions button { flex: 1 1 30%; }
  .pause-hint .secondary-button { font-size: .75rem; }
}

.primary-button:disabled { opacity: .55; cursor: wait; box-shadow: none; transform: none; }
button:focus-visible, select:focus-visible { outline: 3px solid rgba(46,214,197,.72); outline-offset: 3px; }