/* shared/styles.css — Tema alto contraste para proyector */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-main:      #0a1520;
  --bg-card:      rgba(255,255,255,0.07);
  --bg-canvas:    #0a1520;
  --text-primary: #ffffff;
  --text-dim:     #99ccff;
  --kw:           #00ffff;
  --accent-1:     #ffaa00;
  --accent-2:     #00ffff;
  --accent-3:     #ff4444;
  --accent-src:   #00ff44;
  --accent-obs:   #44aaff;
  --grid:         rgba(100,180,255,0.35);
  --border:       rgba(100,180,255,0.30);
  --panel:        #0d1a2e;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-main);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

/* ── Navegación ── */
.top-nav {
  display: flex;
  gap: 4px;
  padding: 8px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  flex-wrap: wrap;
  align-items: center;
}
.top-nav a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 0.82rem;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: all .18s;
}
.top-nav a:hover { color: var(--text-primary); background: rgba(255,255,255,.05); }
.top-nav a.active {
  background: rgba(0,255,255,.08);
  border-color: var(--accent-2);
  color: var(--accent-2);
}
.top-nav a.home {
  color: var(--accent-1);
  font-weight: 600;
}

/* ── Header ── */
header {
  background: linear-gradient(135deg, #0d1525 0%, #162040 100%);
  border-bottom: 1px solid var(--border);
  padding: 18px 24px 14px;
}
header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 4px;
}
header .subtitle {
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* ── Layout principal ── */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── Tarjetas ── */
.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
}
.section-card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-2);
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}
.section-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-1);
  margin: 14px 0 6px;
}

/* ── Descripción ── */
.description {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.65;
  margin-bottom: 14px;
}
.description .kw, .kw { color: var(--kw); font-weight: 600; }

/* ── Controles ── */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-bottom: 14px;
}
.control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 160px;
}
.control-group label {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 500;
}
.control-group .val {
  font-size: 0.78rem;
  color: var(--accent-1);
  font-weight: 700;
}
input[type=range] {
  width: 100%;
  accent-color: var(--accent-2);
  cursor: pointer;
}

/* ── Botones ── */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.btn {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 7px 16px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 0.82rem;
  transition: all .18s;
}
.btn:hover { color: var(--text-primary); border-color: var(--accent-2); }
.btn.active {
  background: rgba(0,255,255,0.12);
  border-color: var(--accent-2);
  color: var(--accent-2);
  font-weight: 600;
}
.btn.play  { border-color: var(--accent-src); color: var(--accent-src); }
.btn.play:hover  { background: rgba(0,255,68,0.10); }
.btn.stop  { border-color: var(--accent-3); color: var(--accent-3); }
.btn.stop:hover  { background: rgba(255,68,68,0.10); }

/* ── Canvas ── */
.canvas-wrap {
  position: relative;
  width: 100%;
}
.canvas-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
canvas {
  display: block;
  width: 100%;
  background: var(--bg-canvas);
  border: 1px solid var(--border);
  border-radius: 8px;
}

/* ── Grid 2 columnas ── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 700px) { .two-col { grid-template-columns: 1fr; } }

/* ── Tabla de tipos ── */
.type-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-top: 8px;
}
.type-table th {
  background: rgba(0,255,255,0.08);
  color: var(--accent-2);
  padding: 7px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
.type-table td {
  padding: 6px 10px;
  border-bottom: 1px solid rgba(100,180,255,0.10);
  color: var(--text-dim);
  vertical-align: top;
}
.type-table tr:hover td { background: rgba(255,255,255,0.03); }
.type-table td:first-child { color: var(--accent-1); font-weight: 600; }

/* ── Tabs ── */
.tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.tab {
  padding: 6px 14px;
  border-radius: 6px 6px 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
  background: rgba(255,255,255,0.03);
  color: var(--text-dim);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all .15s;
}
.tab.active {
  background: rgba(0,255,255,0.10);
  color: var(--accent-2);
  border-color: var(--accent-2);
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Header con logo ── */
.header-left {
  display: flex;
  align-items: center;
  gap: 18px;
}
.logo-uc {
  height: 80px;
  width: auto;
  opacity: 0.92;
  flex-shrink: 0;
}

/* ── Gradientes de h1 por sección ── */
.sec-sonido header h1 {
  background: linear-gradient(90deg, #00ffff, #00ff44);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-acustica header h1 {
  background: linear-gradient(90deg, #ffaa00, #ffff44);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-emision header h1 {
  background: linear-gradient(90deg, #00ffff, #44aaff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-sistema-auditivo header h1 {
  background: linear-gradient(90deg, #ff4444, #ffaa00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-percepcion header h1 {
  background: linear-gradient(90deg, #00ff44, #aa44ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-audio-digital header h1 {
  background: linear-gradient(90deg, #ff44ff, #44aaff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-compresion header h1 {
  background: linear-gradient(90deg, #ffaa00, #ff6644);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-sintesis header h1 {
  background: linear-gradient(90deg, #ff44ff, #ffaa00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-musica header h1 {
  background: linear-gradient(90deg, #ffcc00, #ff44aa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-tonalidad header h1 {
  background: linear-gradient(90deg, #ffd24a, #4ad2ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sec-musica-tecnologica header h1 {
  background: linear-gradient(90deg, #00ffcc, #ff55aa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Card grid (índices de sección) ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 8px;
}
.vineta-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 20px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all .2s;
  display: block;
}
.vineta-card:hover {
  border-color: var(--accent-2);
  background: rgba(0,255,255,0.06);
  transform: translateY(-2px);
}
.vineta-card .num {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}
.vineta-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.vineta-card p {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.5;
}
.vineta-card ul {
  margin-top: 10px;
  padding-left: 14px;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.vineta-card ul li { margin-bottom: 3px; }

/* ── Section index cards (3 secciones en raíz) ── */
.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 16px;
}
.section-card-big {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all .2s;
  display: block;
}
.section-card-big:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.section-card-big .sec-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}
.section-card-big h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  border: none;
  padding: 0;
}
.section-card-big p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.6;
}
.section-card-big .sec-count {
  margin-top: 12px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: .03em;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 16px;
  font-size: 0.78rem;
  color: rgba(100,150,200,0.5);
  border-top: 1px solid var(--border);
  margin-top: 24px;
}
footer a {
  color: var(--accent-2);
  text-decoration: none;
  opacity: 0.85;
}
footer a:hover { opacity: 1; }

/* ── Info box ── */
.info-box {
  background: rgba(0,255,255,0.05);
  border-left: 3px solid var(--accent-2);
  border-radius: 0 8px 8px 0;
  padding: 10px 14px;
  font-size: 0.84rem;
  color: var(--text-dim);
  margin: 10px 0;
  line-height: 1.6;
}
.info-box.warn { border-color: var(--accent-3); background: rgba(255,68,68,0.05); }
.info-box.ok   { border-color: var(--accent-src); background: rgba(0,255,68,0.05); }