/* Soundstage — design tokens, layout, components. No external assets. */

:root {
  --bg: #0c0e14;
  --bg-elev: #131623;
  --bg-elev-2: #1a1f30;
  --border: #2a3148;
  --border-strong: #3a4263;
  --text: #e7ebf3;
  --text-dim: #9aa3b8;
  --text-faint: #6b7385;
  --accent: #ffb547;
  --accent-soft: #ffd28a;
  --accent-deep: #c08530;
  --accent-glow: rgba(255, 181, 71, 0.32);
  --good: #5ed68a;
  --danger: #ff7777;

  --brand-mark-bg: #1a1f30;

  --radius: 14px;
  --radius-sm: 8px;
  --radius-pill: 999px;

  --shadow-1: 0 1px 0 rgba(255,255,255,0.04) inset, 0 1px 2px rgba(0,0,0,0.4);
  --shadow-2: 0 10px 30px rgba(0,0,0,0.35);
  --shadow-3: 0 30px 80px rgba(0,0,0,0.55);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, system-ui, sans-serif;
  --font-display: ui-serif, "Iowan Old Style", "Apple Garamond", "Palatino", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --transition: 180ms cubic-bezier(.2,.7,.2,1);
  --header-h: 72px;
  --transport-h: 84px;
}

:root[data-theme="light"] {
  --bg: #f6f3eb;
  --bg-elev: #ffffff;
  --bg-elev-2: #efe9da;
  --border: #d9d2bf;
  --border-strong: #b9b09a;
  --text: #1e1f25;
  --text-dim: #555967;
  --text-faint: #7e8290;
  --accent: #b06b1e;
  --accent-soft: #d18a3a;
  --accent-deep: #874e10;
  --accent-glow: rgba(176, 107, 30, 0.25);
  --brand-mark-bg: #ffffff;
  --shadow-1: 0 1px 0 rgba(255,255,255,0.6) inset, 0 1px 2px rgba(0,0,0,0.08);
  --shadow-2: 0 10px 30px rgba(0,0,0,0.10);
  --shadow-3: 0 30px 80px rgba(0,0,0,0.16);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { color-scheme: dark; }
:root[data-theme="light"] html, html[data-theme="light"] { color-scheme: light; }
body {
  background:
    radial-gradient(ellipse at top, color-mix(in oklab, var(--accent) 6%, transparent), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
}
button { font: inherit; color: inherit; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
ol, ul { list-style: none; padding: 0; margin: 0; }
h1, h2, h3 { margin: 0; line-height: 1.2; }
p { margin: 0; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; top: -100px; left: 12px;
  background: var(--accent); color: #1a1208;
  padding: 10px 14px; border-radius: 8px;
  font-weight: 600; z-index: 1000;
  transition: top var(--transition);
}
.skip-link:focus { top: 12px; }

/* ----------------------------- Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-elev) 85%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { display: inline-flex; }
.brand__name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.2px;
}
.brand__tagline {
  color: var(--text-dim);
  font-size: 12.5px;
  margin-top: 2px;
}
.topnav { display: flex; align-items: center; gap: 8px; }

/* ----------------------------- Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 500;
  font-size: 13.5px;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.btn:hover { background: var(--bg-elev-2); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: #1a1208;
  border-color: var(--accent-deep);
  box-shadow: 0 6px 14px var(--accent-glow);
}
.btn--primary:hover {
  background: linear-gradient(180deg, var(--accent-soft) 0%, var(--accent) 100%);
  border-color: var(--accent);
}
.btn--ghost { background: transparent; }
.btn .icon { width: 16px; height: 16px; }

#theme-toggle .icon--sun { display: none; }
:root[data-theme="light"] #theme-toggle .icon--moon { display: none; }
:root[data-theme="light"] #theme-toggle .icon--sun { display: inline-block; }

/* ----------------------------- Form inputs */
.field { display: inline-flex; flex-direction: column; gap: 6px; }
.field--inline { flex-direction: row; align-items: center; gap: 8px; }
.field__label { font-size: 12px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.6px; }
.input, .select, .textarea {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.input:focus-visible, .select:focus-visible, .textarea:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  outline: none;
}
.select { padding-right: 28px; min-width: 180px; }
.textarea { width: 100%; resize: vertical; font-family: var(--font-mono); font-size: 13px; line-height: 1.55; }

/* ----------------------------- Stage grid */
.stage-grid {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(380px, 1fr) minmax(280px, 360px);
  gap: 16px;
  padding: 18px 24px;
  align-items: stretch;
  min-height: 0;
}
.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  display: flex; flex-direction: column;
  min-height: 480px;
  overflow: hidden;
}
.panel__head {
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
}
.panel__title { font-family: var(--font-display); font-size: 18px; font-weight: 600; }
.panel__sub { color: var(--text-dim); font-size: 13px; margin-top: 4px; }
.panel__foot {
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-elev-2) 60%, transparent);
}
.eyebrow {
  color: var(--accent);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-weight: 600;
}
.hint { font-size: 12.5px; color: var(--text-faint); }

/* Cast */
.cast-list { padding: 8px; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; flex: 1; }
.cast-card {
  padding: 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 4px 12px;
  align-items: center;
  transition: border-color var(--transition), box-shadow var(--transition);
  position: relative;
}
.cast-card.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.cast-card__avatar {
  grid-row: span 2;
  width: 40px; height: 40px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: #11131a;
  background: var(--cast-color, var(--accent));
  position: relative;
}
.cast-card__avatar::after {
  content: '';
  position: absolute; inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--cast-color, var(--accent));
  opacity: 0;
  transform: scale(0.85);
  transition: opacity var(--transition), transform var(--transition);
}
.cast-card.is-active .cast-card__avatar::after {
  opacity: 0.6;
  transform: scale(1.1);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1.06); opacity: 0.5; }
  50%      { transform: scale(1.18); opacity: 0.1; }
}
.cast-card__name { font-weight: 600; font-size: 14.5px; }
.cast-card__voice { font-size: 12px; color: var(--text-dim); grid-column: 2; }
.cast-card__controls {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 6px 10px;
  margin-top: 6px;
  font-size: 11.5px;
  color: var(--text-dim);
}
.cast-card__voice-select { grid-column: 1 / -1; }
.cast-card select.select { min-width: 0; width: 100%; padding: 6px 8px; font-size: 12.5px; }
.cast-card input[type="range"] { width: 100%; accent-color: var(--accent); }
.cast-card .ctl-row { display: contents; }
.cast-card .ctl-val { font-variant-numeric: tabular-nums; color: var(--text); min-width: 28px; text-align: right; }

/* Script */
.script {
  padding: 8px 4px 12px;
  overflow-y: auto;
  flex: 1;
  counter-reset: line;
}
.script__line {
  padding: 12px 18px;
  border-left: 3px solid transparent;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 12px;
  align-items: baseline;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}
.script__line:hover { background: color-mix(in oklab, var(--bg-elev-2) 70%, transparent); }
.script__line.is-current {
  background: color-mix(in oklab, var(--accent) 10%, transparent);
  border-left-color: var(--accent);
}
.script__line.is-played { color: var(--text-dim); }
.script__line.is-played .script__text { color: var(--text-dim); }
.script__cast {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-size: 11.5px;
  color: var(--line-color, var(--text-dim));
}
.script__text { font-family: var(--font-display); font-size: 16px; line-height: 1.5; }

/* Stage */
.panel--stage { background: linear-gradient(180deg, var(--bg-elev) 0%, var(--bg-elev-2) 100%); }
.stage {
  padding: 20px;
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: space-between;
  gap: 16px;
  text-align: center;
}
.stage__spotlight {
  width: 100%;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  padding: 28px 14px 8px;
  transition: opacity var(--transition);
}
.stage__avatar {
  width: 92px; height: 92px;
  border-radius: 50%;
  background: var(--cast-color, var(--accent));
  color: #11131a;
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 700;
  box-shadow: 0 0 0 6px color-mix(in oklab, var(--cast-color, var(--accent)) 25%, transparent), 0 20px 40px rgba(0,0,0,0.4);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.stage__spotlight[data-state="speaking"] .stage__avatar {
  animation: avatar-breath 1.5s ease-in-out infinite;
}
@keyframes avatar-breath {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.04); }
}
.stage__spotlight[data-state="idle"] .stage__avatar {
  background: var(--bg-elev-2);
  color: var(--text-dim);
  box-shadow: 0 0 0 6px var(--border), 0 20px 40px rgba(0,0,0,0.2);
}
.stage__speaker {
  text-transform: uppercase;
  letter-spacing: 1.6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
}
.stage__spotlight[data-state="speaking"] .stage__speaker { color: var(--cast-color, var(--accent)); }
.stage__line {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.4;
  max-width: 28ch;
  min-height: 3.6em;
  color: var(--text);
}
.stage__counter {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  letter-spacing: 1px;
}

.visualizer {
  display: flex; align-items: flex-end; justify-content: center; gap: 4px;
  height: 36px;
}
.visualizer span {
  width: 4px;
  height: 6px;
  background: var(--cast-color, var(--accent));
  border-radius: 2px;
  opacity: 0.35;
  transition: opacity var(--transition);
}
.stage[data-state="speaking"] .visualizer span,
.stage__spotlight[data-state="speaking"] ~ .visualizer span {
  opacity: 0.9;
}
.panel--stage[data-state="speaking"] .visualizer span {
  animation: bar 0.8s ease-in-out infinite;
  opacity: 1;
}
.panel--stage[data-state="speaking"] .visualizer span:nth-child(1) { animation-delay: -0.10s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(2) { animation-delay: -0.55s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(3) { animation-delay: -0.20s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(4) { animation-delay: -0.70s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(5) { animation-delay: -0.35s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(6) { animation-delay: -0.05s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(7) { animation-delay: -0.45s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(8) { animation-delay: -0.25s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(9) { animation-delay: -0.60s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(10){ animation-delay: -0.15s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(11){ animation-delay: -0.40s; }
.panel--stage[data-state="speaking"] .visualizer span:nth-child(12){ animation-delay: -0.50s; }
@keyframes bar {
  0%, 100% { height: 6px; }
  20%      { height: 28px; }
  40%      { height: 12px; }
  60%      { height: 32px; }
  80%      { height: 18px; }
}

/* ----------------------------- Transport */
.transport {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 14px 24px;
  border-top: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-elev) 80%, transparent);
  backdrop-filter: blur(6px);
  position: sticky; bottom: 0; z-index: 15;
}
.transport__group { display: flex; align-items: center; gap: 8px; }
.iconbtn {
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  display: inline-grid; place-items: center;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.iconbtn svg { width: 18px; height: 18px; }
.iconbtn:hover { background: var(--bg-elev-2); border-color: var(--border-strong); }
.iconbtn:active { transform: translateY(1px); }
.iconbtn--small { width: 32px; height: 32px; border-radius: 8px; }
.iconbtn--primary {
  width: 48px; height: 48px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: #1a1208;
  border-color: var(--accent-deep);
  box-shadow: 0 6px 16px var(--accent-glow);
}
.iconbtn--primary:hover {
  background: linear-gradient(180deg, var(--accent-soft) 0%, var(--accent) 100%);
}
.iconbtn--primary svg { width: 22px; height: 22px; }
#play-btn .icon-pause { display: none; }
#play-btn.is-playing .icon-play { display: none; }
#play-btn.is-playing .icon-pause { display: inline-block; }

.transport__progress { display: flex; align-items: center; gap: 12px; min-width: 0; }
.transport__pos { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-dim); white-space: nowrap; }
.progress {
  flex: 1;
  height: 6px;
  background: var(--bg-elev-2);
  border-radius: var(--radius-pill);
  overflow: hidden;
  position: relative;
}
.progress__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-soft) 100%);
  width: 0%;
  transition: width 240ms ease;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* Toggle */
.toggle { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle__track {
  position: relative;
  width: 36px; height: 20px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: background var(--transition), border-color var(--transition);
}
.toggle__thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  background: var(--text-dim);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
}
.toggle input:checked + .toggle__track {
  background: color-mix(in oklab, var(--accent) 22%, var(--bg-elev-2));
  border-color: var(--accent);
}
.toggle input:checked + .toggle__track .toggle__thumb {
  transform: translateX(16px);
  background: var(--accent);
}
.toggle input:focus-visible + .toggle__track {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.toggle__label { font-size: 13px; color: var(--text-dim); }

/* ----------------------------- Dialog */
.dialog {
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  border-radius: var(--radius);
  padding: 0;
  max-width: 640px;
  width: calc(100% - 32px);
  box-shadow: var(--shadow-3);
}
.dialog--narrow { max-width: 460px; }
.dialog::backdrop {
  background: rgba(6, 8, 14, 0.55);
  backdrop-filter: blur(4px);
}
.dialog__form { display: flex; flex-direction: column; max-height: 80vh; }
.dialog__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.dialog__head h2 { font-family: var(--font-display); font-size: 18px; }
.dialog__body { padding: 18px 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; }
.dialog__body--prose p { color: var(--text-dim); }
.dialog__body--prose h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.8px; color: var(--text); margin-top: 4px; }
.dialog__body--prose ul { display: flex; flex-direction: column; gap: 6px; color: var(--text-dim); }
.dialog__body--prose li { padding-left: 14px; position: relative; }
.dialog__body--prose li::before { content: "›"; position: absolute; left: 0; color: var(--accent); }
.dialog__intro { color: var(--text-dim); font-size: 13.5px; }
.dialog__hint { color: var(--danger); font-size: 13px; min-height: 1em; }
.dialog__foot { display: flex; justify-content: flex-end; gap: 8px; padding: 14px 20px; border-top: 1px solid var(--border); }
.kbd-list { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 18px; }
kbd {
  background: var(--bg-elev-2); border: 1px solid var(--border); border-bottom-width: 2px;
  padding: 1px 6px; border-radius: 4px; font-family: var(--font-mono); font-size: 11.5px; color: var(--text);
}

/* ----------------------------- Footer */
.site-foot {
  padding: 14px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-faint);
  font-size: 12.5px;
}

/* ----------------------------- Responsive */
@media (max-width: 1080px) {
  .stage-grid { grid-template-columns: minmax(240px, 280px) 1fr; }
  .panel--stage { grid-column: 1 / -1; min-height: 280px; }
  .panel--stage .stage { padding: 16px; flex-direction: row; flex-wrap: wrap; justify-content: space-between; }
  .panel--stage .stage__spotlight { padding-top: 8px; width: auto; flex: 1; min-width: 240px; }
  .panel--stage .visualizer { height: 60px; }
}
@media (max-width: 760px) {
  .topbar { flex-direction: column; align-items: stretch; gap: 10px; }
  .topnav { justify-content: flex-end; flex-wrap: wrap; }
  .stage-grid { grid-template-columns: 1fr; padding: 14px; }
  .panel { min-height: 360px; }
  .transport { grid-template-columns: 1fr; gap: 12px; padding: 12px; }
  .transport__group { justify-content: center; flex-wrap: wrap; }
  .transport__progress { order: 3; }
  .brand__tagline { display: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}