/* ============================================================================
   styles.css — Tema oscuro, minimalista
   ============================================================================ */
:root {
  --bg: #0c0e14;
  --bg-2: #141823;
  --panel: #1a1f2e;
  --panel-2: #222838;
  --border: #2b3245;
  --text: #e8ecf4;
  --muted: #8b93a7;
  --accent: #5ee6c5;
  --accent-2: #7aa2ff;
  --left: #7aa2ff;   /* color mano izquierda */
  --right: #ff8db4;  /* color mano derecha */
  --danger: #ff5a6a;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 800px at 70% -10%, #161b2b 0%, var(--bg) 55%);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.accent { color: var(--accent); }

/* --- Pantalla de arranque -------------------------------------------------- */
.start-screen {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 50;
}
.start-card {
  background: linear-gradient(180deg, var(--panel) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  max-width: 540px;
  width: 100%;
  padding: 40px 36px;
  text-align: center;
}
.start-card h1 { font-size: 2.6rem; margin: 0 0 6px; letter-spacing: -0.02em; }
.tagline { color: var(--muted); margin: 0 0 22px; font-size: 1.05rem; }
.howto {
  text-align: left;
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px 16px 34px;
  margin: 0 0 26px;
  line-height: 1.7;
  font-size: 0.96rem;
}
.howto strong { color: var(--accent); font-weight: 600; }
.start-btn {
  background: linear-gradient(180deg, var(--accent) 0%, #36c9a8 100%);
  color: #06231d;
  border: none;
  border-radius: var(--radius);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 16px 48px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  box-shadow: 0 8px 24px rgba(94, 230, 197, 0.25);
}
.start-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(94, 230, 197, 0.35); }
.start-btn:disabled { opacity: 0.6; cursor: wait; transform: none; }
.start-status { color: var(--muted); min-height: 1.2em; margin: 16px 0 0; font-size: 0.92rem; }
.start-status.error { color: var(--danger); }
.privacy { color: var(--muted); font-size: 0.82rem; margin: 22px 0 0; }

/* --- Layout de la app ------------------------------------------------------ */
.app { max-width: 1080px; margin: 0 auto; padding: 18px 20px 60px; }
.topbar {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 14px;
}
.brand { font-size: 1.4rem; margin: 0; letter-spacing: -0.01em; }
.privacy-inline { color: var(--muted); font-size: 0.8rem; margin: 0; }
.diagnostics { color: var(--muted); font-size: 0.74rem; font-variant-numeric: tabular-nums; }
.session-status {
  color: var(--accent); font-size: 0.74rem; font-weight: 700;
  padding: 4px 8px; border: 1px solid rgba(94, 230, 197, 0.35); border-radius: 999px;
}
.session-status.error { color: var(--danger); border-color: rgba(255, 90, 106, 0.45); }
.session-controls, .config-actions, .creative-actions {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
}
.session-controls { margin-left: auto; }
.session-controls button, .config-actions button, .creative-actions button,
.calibration-dialog button {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 9px; padding: 8px 12px; cursor: pointer;
}

.stage {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 1fr);
  gap: 18px;
  align-items: start;
}
@media (max-width: 880px) { .stage { grid-template-columns: 1fr; } }

.video-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 9;
}
#video, #overlay {
  position: absolute; inset: 0; width: 100%; height: 100%;
  /* Espejo (selfie) */
  transform: scaleX(-1);
}
#video { object-fit: cover; }

/* --- Lecturas por mano ----------------------------------------------------- */
.readouts { display: grid; gap: 14px; }
.readout {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.readout.active { box-shadow: 0 0 0 1px rgba(94,230,197,0.25), var(--shadow); }
#readout-left.active { border-color: var(--left); }
#readout-right.active { border-color: var(--right); }
.readout-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.hand-dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.hand-dot.left { background: var(--left); }
.hand-dot.right { background: var(--right); }
.hand-label { font-weight: 600; font-size: 0.9rem; }
.hand-state { margin-left: auto; font-size: 0.78rem; color: var(--muted); }
.hand-state.on { color: var(--accent); }
.note { font-size: 2.2rem; font-weight: 800; line-height: 1; letter-spacing: -0.02em; }
.freq { color: var(--muted); font-variant-numeric: tabular-nums; margin: 2px 0 12px; font-size: 0.9rem; }

.bar-group { display: grid; gap: 8px; }
.bar-row { display: grid; grid-template-columns: 36px 1fr; align-items: center; gap: 8px; }
.bar-row span { font-size: 0.74rem; color: var(--muted); }
.bar {
  height: 10px; border-radius: 6px; background: var(--panel-2);
  overflow: hidden; border: 1px solid var(--border);
}
.bar i {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  transition: width 0.06s linear;
}
.bar.vol i { background: linear-gradient(90deg, #ffb86b, var(--right)); }
.vol-pct { text-align: right; color: var(--muted); font-size: 0.8rem; margin-top: 6px; font-variant-numeric: tabular-nums; }

/* --- Controles ------------------------------------------------------------- */
.controls {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px;
  margin-top: 20px; padding: 16px 18px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
}
.control-group { display: grid; gap: 10px; }
.control-group-title {
  margin: 0; color: var(--muted); font-size: 0.67rem; font-weight: 800;
  letter-spacing: 0.1em; text-transform: uppercase;
}
.control-group-items { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end; }
.control-group-utility { min-width: min(100%, 300px); padding-left: 16px; border-left: 1px solid var(--border); }
.control { display: flex; flex-direction: column; gap: 6px; }
.control > label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
#soundPresetSelect { min-width: 230px; }
select {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; padding: 9px 12px; font-size: 0.92rem; cursor: pointer; min-width: 130px;
}
.seg { display: inline-flex; background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
.seg-btn {
  background: transparent; color: var(--muted); border: none; border-radius: 8px;
  padding: 7px 16px; font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all 0.15s ease;
}
.seg-btn.active { background: var(--accent); color: #06231d; }
.toggles { flex-direction: row; gap: 16px; align-items: center; }
.chk { display: flex; align-items: center; gap: 6px; font-size: 0.86rem; color: var(--text); cursor: pointer; text-transform: none; letter-spacing: 0; }
.chk input { accent-color: var(--accent); width: 16px; height: 16px; }

.performance-config {
  margin-top: 14px;
  padding: 14px 18px 16px;
  background: rgba(26, 31, 46, 0.82);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.performance-config summary {
  color: var(--text);
  font-size: 0.94rem;
  font-weight: 700;
  cursor: pointer;
}
.performance-config[open] summary { margin-bottom: 14px; }
.performance-summary { color: var(--muted); font-size: 0.74rem; font-weight: 500; margin-left: 8px; }
.config-intro, .config-description, .config-status {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}
.config-intro { margin: 10px 0 14px; }
.config-description { margin: 14px 0 0; }
.config-status { min-height: 1.2em; margin: 4px 0 0; color: var(--accent); }
.config-status.error { color: var(--danger); }
.config-actions { margin-top: 12px; }
.ir-upload { color: var(--muted); font-size: 0.78rem; cursor: pointer; }
.ir-upload input { display: block; max-width: 190px; margin-top: 4px; }
.documentation-launcher {
  margin-top: 14px;
  padding: 18px;
  background: rgba(26, 31, 46, 0.82);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.documentation-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}
.documentation-heading h3 { margin: 1px 0 0; font-size: 1rem; }
.documentation-heading > p {
  max-width: 380px;
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.4;
  text-align: right;
}
.documentation-kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.documentation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.documentation-card {
  position: relative;
  display: flex;
  min-height: 152px;
  padding: 15px;
  flex-direction: column;
  color: var(--text);
  overflow: hidden;
  background: linear-gradient(145deg, rgba(34, 40, 56, 0.94), rgba(22, 28, 40, 0.94));
  border: 1px solid var(--border);
  border-radius: 13px;
  text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.documentation-card::after {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  right: -55px;
  top: -60px;
  background: radial-gradient(circle, rgba(94, 230, 197, 0.18), transparent 70%);
  pointer-events: none;
}
.documentation-card:hover {
  color: var(--text);
  border-color: var(--accent);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.28);
  transform: translateY(-2px);
}
.documentation-card:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.documentation-card__index {
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}
.documentation-card__title { margin-top: 9px; font-size: 0.92rem; font-weight: 750; }
.documentation-card__description { margin-top: 5px; color: var(--muted); font-size: 0.72rem; line-height: 1.42; }
.documentation-card__cta { margin-top: auto; padding-top: 12px; color: var(--accent); font-size: 0.72rem; font-weight: 750; }
.config-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(170px, 1fr));
  gap: 14px 16px;
  align-items: end;
}
.config-wide { grid-column: span 2; }
.config-wide select { width: 100%; }
.number-unit {
  display: flex;
  align-items: center;
  gap: 7px;
}
.number-unit input {
  width: 100%;
  min-width: 0;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 10px;
  font: inherit;
}
.number-unit span { color: var(--muted); font-size: 0.8rem; }
.config-slider input { width: 100%; accent-color: var(--accent); }
.config-slider output {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  text-transform: none;
  letter-spacing: 0;
}
.octave-stepper {
  display: grid;
  grid-template-columns: 36px minmax(110px, 1fr) 36px;
  align-items: center;
  gap: 8px;
}
.octave-stepper button {
  width: 36px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--panel-2);
  color: var(--accent);
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
}
.octave-stepper button:hover { border-color: var(--accent); }

.training-panel, .creative-tools {
  margin-top: 14px; padding: 14px 18px; background: var(--panel);
  border: 1px solid var(--border); border-radius: var(--radius);
}
.training-panel { display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); }
.training-panel strong { color: var(--accent); }
.creative-tools { display: grid; grid-template-columns: 1fr 1.2fr; gap: 14px 20px; align-items: center; }
.creative-tools h3 { margin: 0 0 4px; }
.creative-tools p { margin: 0; color: var(--muted); font-size: 0.8rem; }
.xy-controls { display: grid; gap: 8px; }
.xy-controls label { display: grid; grid-template-columns: 90px 1fr; gap: 8px; font-size: 0.78rem; color: var(--muted); }
.creative-actions { grid-column: 1 / -1; }
.creative-actions button.active { border-color: var(--accent); color: var(--accent); }
.gesture-import { color: var(--muted); font-size: 0.78rem; }
.gesture-import input { display: block; max-width: 180px; }
.calibration-dialog {
  max-width: 480px; color: var(--text); background: var(--panel);
  border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.calibration-dialog::backdrop { background: rgba(0, 0, 0, 0.72); }
@media (max-width: 760px) { .creative-tools { grid-template-columns: 1fr; } }
@media (max-width: 760px) {
  .controls { grid-template-columns: 1fr; }
  .control-group-utility { order: -1; padding: 0 0 14px; border: 0; border-bottom: 1px solid var(--border); }
  .rec { min-width: 0; }
  .performance-summary { display: block; margin: 4px 22px 0 0; }
  .config-grid { grid-template-columns: 1fr; }
  .config-wide { grid-column: auto; }
  .documentation-heading { align-items: start; flex-direction: column; }
  .documentation-heading > p { max-width: none; text-align: left; }
  .documentation-grid { grid-template-columns: 1fr; }
  .documentation-card { min-height: 132px; }
}

.rec { min-width: 270px; }
.rec-row { display: flex; align-items: center; gap: 10px; }
.rec-btn {
  min-height: 42px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--danger); font-size: 0.9rem; font-weight: 700; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 13px; transition: all 0.15s ease;
}
.rec-btn:hover { border-color: var(--danger); }
.rec-btn.recording { background: var(--danger); color: #fff; border-color: var(--danger); animation: pulse 1.2s infinite; }
.rec-btn:disabled { opacity: 0.4; cursor: not-allowed; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(255,90,106,0.5); } 50% { box-shadow: 0 0 0 8px rgba(255,90,106,0); } }
.rec-timer { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 0.95rem; }
.rec-status { font-size: 0.76rem; color: var(--muted); min-height: 1em; }
.rec-status.error { color: var(--danger); }

/* --- Resultado de grabación ------------------------------------------------ */
.rec-result {
  width: min(540px, 100%);
  margin-top: 6px; padding: 12px 14px; background: var(--panel-2);
  border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; flex-wrap: wrap; align-items: center; gap: 16px;
}
.rec-result audio { flex: 1 1 280px; min-width: 240px; }
.rec-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.dl-btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; padding: 9px 16px; font-size: 0.9rem; text-decoration: none;
  cursor: pointer; transition: all 0.15s ease;
}
.dl-btn:hover { border-color: var(--accent); color: var(--accent); }

.app-footer {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
  text-align: center;
}
.app-footer p { margin: 0; }

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}