:root {
  color-scheme: dark;
  --background: #07111f;
  --surface: #111c2d;
  --surface-raised: #18263a;
  --border: #30425b;
  --text: #f4f7fb;
  --muted: #a9b6c8;
  --accent: #62d3ff;
  --accent-strong: #27b9ee;
  --danger: #ff8f99;
  --focus: #ffd166;
  --radius: 16px;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--background); }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at top right, #173354 0, var(--background) 38rem); color: var(--text); }
button, input, select { font: inherit; }
button, select, input[type="search"], input[type="text"] { min-height: 44px; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.app-header, main, footer { width: min(1120px, calc(100% - 32px)); margin-inline: auto; }
.app-header { display: flex; justify-content: space-between; gap: 24px; align-items: flex-start; padding: calc(24px + env(safe-area-inset-top)) 0 20px; }
.app-header h1 { margin: 0; font-size: clamp(1.8rem, 5vw, 3rem); letter-spacing: -0.03em; }
.app-header p { color: var(--muted); }
.eyebrow { margin: 0 0 6px; color: var(--accent); font-size: 0.74rem; letter-spacing: 0.14em; font-weight: 800; }
.status-cluster, .actions, .transport, .mode-controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.chip { display: inline-flex; align-items: center; min-height: 32px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); background: rgba(7, 17, 31, 0.72); }

main { display: grid; gap: 16px; padding-bottom: 48px; }
main > *, .two-column > *, .panel { min-width: 0; }
.notice, .message, .panel { border: 1px solid var(--border); background: color-mix(in srgb, var(--surface) 92%, transparent); border-radius: var(--radius); }
.notice { padding: 14px 18px; border-left: 4px solid var(--accent); }
.notice h2 { font-size: 1rem; margin: 0 0 4px; }
.notice p, .message { margin: 0; color: var(--muted); }
.message { padding: 12px 16px; }
.message.error { color: #ffe3e6; border-color: #8c3f48; }
.panel { padding: clamp(16px, 3vw, 24px); box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18); }
.section-heading { display: flex; justify-content: space-between; gap: 16px; align-items: start; margin-bottom: 16px; }
.section-heading h2 { margin: 0; font-size: 1.25rem; }

.button, .icon-button { border: 1px solid var(--border); color: var(--text); background: var(--surface-raised); border-radius: 12px; padding: 9px 14px; cursor: pointer; }
.button:hover, .icon-button:hover { border-color: var(--accent); }
.button.primary, .icon-button.primary { border-color: var(--accent-strong); background: var(--accent-strong); color: #00151f; font-weight: 800; }
.button.danger { border-color: #83404a; color: #ffd8dc; }
.button:disabled { opacity: 0.55; cursor: not-allowed; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.metrics { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin: 18px 0 0; }
.metrics div { padding: 12px; border-radius: 12px; background: var(--surface-raised); }
.metrics dt { color: var(--muted); font-size: 0.78rem; }
.metrics dd { margin: 4px 0 0; font-weight: 800; }

.media-stage { min-height: 210px; display: grid; place-items: center; border: 1px dashed var(--border); border-radius: 14px; overflow: hidden; background: #02060c; }
.media-stage audio, .media-stage video { width: 100%; max-height: 420px; }
.media-stage audio[hidden], .media-stage video[hidden], .empty-player[hidden] { display: none; }
.empty-player { color: var(--muted); padding: 40px 16px; text-align: center; }
.now-playing { display: flex; justify-content: space-between; gap: 16px; margin: 14px 0; }
.now-playing span { color: var(--muted); font-variant-numeric: tabular-nums; }
.transport { justify-content: center; }
.icon-button { min-width: 52px; min-height: 52px; }
.range-label { display: block; margin-top: 14px; color: var(--muted); font-size: 0.82rem; }
#seek-input { width: 100%; min-height: 44px; }
.mode-controls { justify-content: center; }
.mode-controls label { min-height: 44px; display: inline-flex; align-items: center; gap: 7px; padding-inline: 6px; }
.mode-controls input[type="checkbox"] { width: 20px; height: 20px; }

.two-column { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr); gap: 16px; }
.filters { display: grid; grid-template-columns: auto minmax(0, 1fr) auto minmax(150px, 0.4fr); gap: 8px; align-items: center; }
.filters label { color: var(--muted); }
input[type="search"], input[type="text"], select { width: 100%; border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; color: var(--text); background: #0b1524; }
.media-list { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 8px; }
.media-list li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 10px; border: 1px solid var(--border); border-radius: 12px; background: rgba(24, 38, 58, 0.62); }
.media-list button { text-align: left; color: inherit; background: transparent; border: 0; min-height: 44px; cursor: pointer; }
.media-list small { display: block; color: var(--muted); margin-top: 3px; }
.media-list strong, .media-list small { overflow-wrap: anywhere; }
.availability { font-size: 0.76rem; color: var(--muted); }
.availability.available { color: #8ee7b2; }
.muted { color: var(--muted); }

.capability-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.capability-list div { padding: 12px; background: var(--surface-raised); border-radius: 12px; }
.capability-list dt { color: var(--muted); font-size: 0.78rem; }
.capability-list dd { margin: 4px 0 0; font-weight: 800; }
.environment-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.environment-grid label { display: grid; gap: 5px; color: var(--muted); font-size: 0.82rem; }
.table-wrap { max-width: 100%; min-width: 0; margin: 18px 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { text-align: left; padding: 9px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-size: 0.78rem; }
td input, td select { width: 100%; }
footer { padding: 0 0 calc(28px + env(safe-area-inset-bottom)); color: var(--muted); }

@media (max-width: 780px) {
  .app-header { display: grid; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .two-column { grid-template-columns: 1fr; }
  .filters { grid-template-columns: 1fr; }
  .environment-grid, .capability-list { grid-template-columns: 1fr 1fr; }
  .now-playing { display: grid; }
}

@media (max-width: 480px) {
  .app-header, main, footer { width: min(100% - 20px, 1120px); }
  .metrics, .environment-grid, .capability-list { grid-template-columns: 1fr; }
  .actions .button { width: 100%; text-align: center; }
}

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