/* Brainwave Studio — Deep Space palette */
:root {
  --bg: #0a0a14;
  --bg-elev: #11121f;
  --bg-elev-2: #181a2e;
  --border: #1f2240;
  --text: #d8dcf0;
  --text-dim: #8a8fb0;
  --accent: #5fe3d4;
  --accent-2: #9c7cff;
  --warning: #ffb86b;
  --danger: #ff6b8b;
  --green: #6bdc92;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, sans-serif;
  background: radial-gradient(ellipse at top, #131428 0%, var(--bg) 60%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h2 {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 0.8rem 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1rem;
  padding-top: max(0.8rem, env(safe-area-inset-top));
  background: rgba(10, 10, 20, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.mode-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}
.mode-btn:hover { border-color: var(--accent); }
.mode-btn[data-mode="speaker"] .mode-icon::before { content: "🔊"; }
.mode-btn[data-mode="speaker"] .mode-icon { font-size: 0; }
.mode-btn[data-mode="speaker"] .mode-icon::before { font-size: 1.1rem; }
.mode-icon { font-size: 1.1rem; line-height: 1; }

.app-title {
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

.stopall-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-elev);
  color: var(--text-dim);
  border: 1px solid var(--border);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.15s;
}
.stopall-btn:hover { color: var(--danger); border-color: var(--danger); }
.stopall-btn:active { transform: scale(0.92); }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.2rem 1rem 4rem;
  padding-bottom: max(4rem, calc(2rem + env(safe-area-inset-bottom)));
}
main > section { margin-bottom: 1.6rem; }

/* Presets — chips de categoría */
.category-chips {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.category-chips::-webkit-scrollbar { height: 4px; }
.category-chips::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.cat-chip {
  flex-shrink: 0;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}
.cat-chip:hover { color: var(--text); }
.cat-chip.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.cat-chip .cat-count { opacity: 0.7; margin-left: 0.3rem; font-size: 0.72rem; }

.evidence-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1rem;
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-bottom: 0.7rem;
  align-items: center;
}
.ev-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 0.35rem;
  vertical-align: 1px;
}
.ev-science { background: #6bdc92; }
.ev-community { background: #5fe3d4; }
.ev-tradition { background: #ffb86b; }
.ev-anecdotal { background: #8a8fb0; }
.ev-none { background: #ff6b8b; }

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.5rem;
}
.preset-btn {
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 0.7rem;
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  text-align: left;
  transition: all 0.18s;
  overflow: hidden;
}
.preset-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.preset-btn.active { border-color: var(--accent); background: var(--bg-elev-2); }
.preset-btn .preset-name { display: block; font-weight: 600; padding-right: 14px; }
.preset-btn .preset-desc { display: block; font-size: 0.7rem; color: var(--text-dim); margin-top: 0.15rem; }
.preset-btn .preset-ev {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px; height: 8px;
  border-radius: 50%;
}
.preset-btn .preset-ev.ev-science { background: #6bdc92; }
.preset-btn .preset-ev.ev-community { background: #5fe3d4; }
.preset-btn .preset-ev.ev-tradition { background: #ffb86b; }
.preset-btn .preset-ev.ev-anecdotal { background: #8a8fb0; }
.preset-btn .preset-ev.ev-none { background: #ff6b8b; }

/* Mixer blocks */
.mixer { display: grid; gap: 0.7rem; }
.block {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  transition: all 0.2s;
}
.block.active { border-color: var(--accent); background: var(--bg-elev-2); }
.block.disabled { opacity: 0.4; pointer-events: none; }

.block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.7rem;
  gap: 0.5rem;
}

/* Botón play/stop por módulo */
.block-play {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  text-align: left;
}
.block-play .play-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  font-size: 0.7rem;
  flex-shrink: 0;
}
.block-play[data-state="on"] {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  box-shadow: 0 2px 10px rgba(95, 227, 212, 0.25);
}
.block-play[data-state="on"] .play-icon {
  background: var(--bg);
  color: var(--accent);
}
.block-play[data-state="on"] .play-icon::before { content: "■"; }
.block-play[data-state="off"] .play-icon::before { content: "▶"; padding-left: 2px; }
.block-play .play-icon { font-size: 0; }  /* hide direct text */
.block-play .play-icon::before { font-size: 0.75rem; }

.block-play:hover { transform: translateY(-1px); }
.block-play:active { transform: translateY(0) scale(0.98); }

.badge {
  font-size: 0.7rem;
  color: var(--text-dim);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
}
.headphones-only { color: var(--accent-2); }
.speaker-friendly { color: var(--green); }

.block-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.7rem 1rem;
}
.ctrl { display: flex; flex-direction: column; gap: 0.25rem; }
.ctrl.wide { grid-column: 1 / -1; }
.ctrl label {
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.ctrl input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}
.ctrl input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 0 4px rgba(95, 227, 212, 0.15);
  transition: box-shadow 0.15s;
}
.ctrl input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  background: var(--accent);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 0 4px rgba(95, 227, 212, 0.15);
}
.ctrl output {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.ctrl select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 0.5rem;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

.breath-cue {
  margin-top: 0.7rem;
  text-align: center;
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--accent-2);
  min-height: 2rem;
  text-transform: uppercase;
  transition: opacity 0.5s;
}

/* Visualization */
.viz-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.6rem;
}
.viz-tab {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.15s;
}
.viz-tab:hover { color: var(--text); }
.viz-tab.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }

#viz {
  width: 100%;
  height: 240px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: block;
}

/* Actions */
.actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.action-btn {
  flex: 1 1 auto;
  min-width: 120px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.15s;
}
.action-btn:hover { border-color: var(--accent); }

/* Disclaimers */
.info details {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
}
.info summary {
  cursor: pointer;
  color: var(--warning);
  font-weight: 600;
  font-size: 0.88rem;
}
.info p {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-dim);
  margin: 0.7rem 0 0;
}
.info p strong { color: var(--text); }

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: fadeIn 0.2s;
}
.modal.hidden { display: none; }
.modal-content {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  max-width: 500px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}
.modal-content.wide { max-width: 720px; }
.modal-content h3 {
  margin: 0 0 1rem 0;
  font-size: 1.15rem;
}
.modal-content label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
  margin-top: 0.8rem;
}
.modal-content input[type="text"],
.modal-content input[type="number"],
.modal-content textarea,
.modal-content select {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
  font: inherit;
  font-size: 0.9rem;
}
.modal-content textarea { min-height: 80px; resize: vertical; }
.modal-content fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 1rem;
  margin-bottom: 0.8rem;
}
.modal-content legend {
  padding: 0 0.5rem;
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: 1.2rem;
}
.btn-primary, .btn-ghost {
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  border: 1px solid var(--border);
}
.btn-primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn-ghost { background: var(--bg); color: var(--text); }

.history-list {
  max-height: 50vh;
  overflow-y: auto;
}
.history-item {
  padding: 0.6rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.history-item .history-date {
  color: var(--accent);
  font-family: ui-monospace, monospace;
  font-size: 0.78rem;
}
.history-item .history-meta {
  color: var(--text-dim);
  font-size: 0.78rem;
  margin-top: 0.2rem;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Headphones / speaker mode visibility */
body.mode-speaker .block[data-requires="headphones"] .badge.headphones-only::after {
  content: " requiere cascos";
  font-size: 0.65rem;
}
body.mode-speaker .block[data-requires="headphones"] {
  opacity: 0.55;
}
body.mode-speaker .block[data-requires="headphones"]:has(input[type="checkbox"]:checked) {
  opacity: 0.85;
}

/* Mobile tweaks */
@media (max-width: 500px) {
  main { padding: 1rem 0.7rem 4rem; }
  .topbar { padding: 0.6rem 0.7rem; gap: 0.5rem; }
  .app-title { font-size: 0.85rem; }
  .mode-btn { padding: 0.4rem 0.6rem; font-size: 0.78rem; }
  .stopall-btn { width: 34px; height: 34px; font-size: 0.9rem; }
  .preset-grid { grid-template-columns: repeat(auto-fill, minmax(95px, 1fr)); }
  h2 { font-size: 0.72rem; }
  .block { padding: 0.7rem 0.8rem; }
  .block-play { font-size: 0.86rem; padding: 0.5rem 0.75rem; }
}