:root {
  color-scheme: dark;
  --bg-top: #08111f;
  --bg-bottom: #12243f;
  --panel: rgba(7, 17, 32, 0.72);
  --panel-border: rgba(159, 210, 255, 0.16);
  --text-main: #f4f7fb;
  --text-muted: #a5b5c8;
  --accent: #78f0d5;
  --accent-strong: #ffc857;
  --danger: #ff7a7a;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  --radius-lg: 28px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(120, 240, 213, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(255, 200, 87, 0.18), transparent 24%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  color: var(--text-main);
}

body {
  min-height: 100vh;
}

.app-shell {
  width: min(1120px, calc(100vw - 24px));
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 0 max(24px, env(safe-area-inset-bottom));
  position: relative;
  isolation: isolate;
}

.hero-card,
.panel {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hidden {
  display: none !important;
}

.hero-card {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.build-tag {
  margin: 0 0 10px;
  color: rgba(165, 181, 200, 0.72);
  font-size: 0.82rem;
}

.screen {
  margin-top: 18px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.9rem);
  line-height: 0.95;
  max-width: 11ch;
}

.hero-text {
  margin-top: 14px;
  max-width: 58ch;
  color: var(--text-muted);
  line-height: 1.55;
}

.control-row {
  margin-top: 24px;
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.slider-row {
  margin-top: 16px;
  display: flex;
  gap: 24px;
  align-items: stretch;
  flex-wrap: wrap;
}

.menu-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.menu-card {
  appearance: none;
  text-align: left;
  border: 1px solid var(--panel-border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(7, 17, 32, 0.72);
  color: var(--text-main);
  border-radius: var(--radius-lg);
  padding: 24px;
  cursor: pointer;
  box-shadow: var(--shadow);
  min-height: 210px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.menu-card:hover {
  transform: translateY(-2px);
  border-color: rgba(120, 240, 213, 0.35);
}

.menu-card strong {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
}

.menu-card span {
  color: var(--text-muted);
  line-height: 1.5;
}

.menu-card-kicker {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.76rem;
}

.menu-card-accent {
  background:
    radial-gradient(circle at top right, rgba(255, 200, 87, 0.18), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(7, 17, 32, 0.72);
}

.primary-button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #3cb6ff);
  color: #03131c;
  font-weight: 700;
  padding: 14px 22px;
  cursor: pointer;
  transition: transform 0.18s ease, filter 0.18s ease;
}

.secondary-button {
  appearance: none;
  border: 1px solid rgba(159, 210, 255, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  font-weight: 600;
  padding: 14px 18px;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.secondary-button:hover {
  transform: translateY(-1px);
  border-color: rgba(120, 240, 213, 0.4);
}

.full-width {
  width: 100%;
}

.primary-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.primary-button.active {
  background: linear-gradient(135deg, var(--accent-strong), #ff8a5b);
}

.primary-button.button-press {
  animation: buttonPress 0.36s ease;
}

@keyframes buttonPress {
  0% {
    transform: translateY(0) scale(1);
    filter: brightness(1);
  }
  45% {
    transform: translateY(1px) scale(0.97);
    filter: brightness(0.95);
  }
  100% {
    transform: translateY(0) scale(1);
    filter: brightness(1.03);
  }
}

#trainingVotesValue.vote-bump {
  animation: voteBump 0.48s ease;
}

@keyframes voteBump {
  0% {
    transform: scale(1);
    color: var(--text-main);
  }
  40% {
    transform: scale(1.08);
    color: var(--accent);
  }
  100% {
    transform: scale(1);
    color: var(--text-main);
  }
}

.switch {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-direction: column;
  align-items: stretch;
  color: var(--text-muted);
  padding: 14px 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
}

.switch span {
  display: flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
}

.switch input {
  width: min(260px, 42vw);
}

.switch-wide {
  min-width: min(360px, 100%);
}

.slider-row .switch + .switch {
  margin-left: 0;
}

.dashboard-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(260px, 1fr);
  gap: 18px;
}

.game-layout {
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.training-layout {
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 1fr);
}

.panel {
  border-radius: var(--radius-lg);
  padding: 20px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  line-height: 1.2;
  min-height: 40px;
  text-align: center;
}

.status-badge.idle {
  background: rgba(165, 181, 200, 0.12);
  color: var(--text-muted);
}

.status-badge.active {
  background: rgba(120, 240, 213, 0.14);
  color: var(--accent);
}

.status-badge.error {
  background: rgba(255, 122, 122, 0.14);
  color: var(--danger);
}

#spectrumCanvas {
  width: 100%;
  height: auto;
  aspect-ratio: 1.875;
  display: block;
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(13, 25, 44, 0.92), rgba(6, 12, 24, 0.98)),
    radial-gradient(circle at 50% 0%, rgba(120, 240, 213, 0.18), transparent 48%);
}

.weight-meter {
  margin-top: 14px;
  padding: 14px 16px 12px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(159, 210, 255, 0.12);
}

.weight-meter-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.weight-meter-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-strong);
  letter-spacing: 0.04em;
}

.weight-meter-scale {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
}

.weight-meter-bin {
  height: 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(159, 210, 255, 0.1);
  transition: background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  opacity: 0.4;
}

.weight-meter-bin.active {
  opacity: 1;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 0 18px rgba(120, 240, 213, 0.22);
}

.weight-meter-bin.focus {
  transform: translateY(-1px) scaleY(1.08);
  box-shadow: 0 0 22px rgba(255, 200, 87, 0.28);
}

.weight-meter-legend {
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

#gameCanvas {
  width: 100%;
  height: auto;
  aspect-ratio: 1.15;
  max-height: min(62vh, 620px);
  display: block;
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(13, 25, 44, 0.92), rgba(6, 12, 24, 0.98)),
    radial-gradient(circle at 50% 0%, rgba(255, 200, 87, 0.14), transparent 52%);
}

#karaokeCanvas {
  width: 100%;
  height: auto;
  aspect-ratio: 1.875;
  display: block;
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(13, 25, 44, 0.92), rgba(6, 12, 24, 0.98)),
    radial-gradient(circle at 40% 0%, rgba(120, 240, 213, 0.12), transparent 56%);
}

.training-world {
  width: 100%;
  aspect-ratio: 1.7;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  background:
    linear-gradient(180deg, rgba(13, 25, 44, 0.92), rgba(6, 12, 24, 0.98)),
    radial-gradient(circle at 40% 0%, rgba(120, 240, 213, 0.14), transparent 56%);
  margin-bottom: 12px;
}

.training-world-frame {
  position: absolute;
  inset: -2px;
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  border: 0;
  display: block;
  pointer-events: none;
}

.karaoke-youtube {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.18);
  margin-bottom: 12px;
}

.karaoke-youtube iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.karaoke-external-link {
  display: block;
  margin: -2px 0 12px;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
}

.karaoke-external-link:hover {
  text-decoration: underline;
}

.karaoke-score-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.training-audio {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 12px;
}

.training-audio audio {
  width: 100%;
  border-radius: var(--radius-md);
  background: rgba(7, 17, 32, 0.6);
}

.training-rating-panel {
  display: grid;
  gap: 12px;
  padding: 14px;
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(120, 240, 213, 0.09), rgba(255, 255, 255, 0.035)),
    rgba(7, 17, 32, 0.52);
  border: 1px solid rgba(120, 240, 213, 0.16);
  box-shadow: 0 16px 28px rgba(0, 0, 0, 0.16);
}

.training-score-control {
  width: 100%;
  justify-content: space-between;
}

.training-score-control input {
  width: min(360px, 48vw);
}

.training-scale {
  display: grid;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.86rem;
  line-height: 1.4;
}

#homeScreen {
  position: relative;
  overflow: hidden;
}

.app-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: #120812 url("./assets/nebula/poster.jpg?v=20261019-02") center / cover no-repeat;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.app-shell.menu-bg-active::before {
  opacity: 1;
}

#menuBackgroundCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
  pointer-events: none;
}

.app-shell.menu-bg-active #menuBackgroundCanvas.nebula-ready {
  opacity: 1;
}

.background-credit {
  margin-top: 16px;
  color: var(--text-muted);
  text-align: right;
  font-size: 0.7rem;
}

.background-credit a {
  color: inherit;
  text-decoration-color: rgba(165, 181, 200, 0.4);
  text-underline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .app-shell::before,
  #menuBackgroundCanvas {
    transition: none;
  }
}

.hero-card,
.screen {
  position: relative;
  z-index: 1;
}

.app-shell.menu-bg-active .hero-card {
  background: rgba(7, 17, 32, 0.55);
  border-color: rgba(159, 210, 255, 0.22);
}

.app-shell.menu-bg-active .menu-card {
  backdrop-filter: blur(14px);
}

#homeScreen .menu-grid {
  position: relative;
  z-index: 1;
}

.panel-stats {
  display: grid;
  gap: 14px;
  align-content: start;
}

.button-stack {
  display: grid;
  gap: 12px;
}

.stat-block,
.tip-box {
  border-radius: var(--radius-md);
  padding: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-label,
.tip-title {
  color: var(--text-muted);
  font-size: 0.86rem;
  margin-bottom: 8px;
}

.stat-value {
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  font-weight: 700;
}

.stat-value-small {
  font-size: clamp(1rem, 2.1vw, 1.25rem);
  line-height: 1.4;
}

.tip-text {
  color: var(--text-main);
  line-height: 1.55;
}

@media (max-width: 840px) {
  .app-shell {
    width: min(100vw - 16px, 1120px);
  }

  .hero-card,
  .panel {
    border-radius: 24px;
    padding: 18px;
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
  }

  .training-layout {
    grid-template-columns: 1fr;
  }

  .menu-grid {
    grid-template-columns: 1fr;
  }

  .switch {
    width: 100%;
    justify-content: space-between;
  }

  .switch input {
    width: 42vw;
  }

  .training-score-control {
    display: grid;
    gap: 10px;
  }

  .training-score-control input {
    width: 100%;
  }

  .slider-row {
    gap: 28px;
  }

  #gameCanvas {
    aspect-ratio: 0.92;
    max-height: none;
  }
}


/* Sliding five-second passability, separate from the local voice-weight heuristic. */
.pass-meter { margin-top: 18px; padding: 16px; border: 1px solid rgba(124, 240, 213, .22); border-radius: 14px; }
.pass-toggle { display: flex; gap: 10px; align-items: center; cursor: pointer; }
.pass-toggle input { width: 18px; height: 18px; accent-color: #7cf0d5; flex-shrink: 0; }
.pass-meter progress { display: block; width: 100%; height: 10px; margin: 10px 0; accent-color: #7cf0d5; }
.pass-meter .weight-meter-value { white-space: nowrap; }
.pass-note { color: rgba(194, 213, 235, .7); font-size: 12px; line-height: 1.45; margin-bottom: 0; }

/* Pairwise vocal-weight training */
.training-mode-switch { display:flex; gap:8px; margin:0 0 16px; flex-wrap:wrap; }
.training-mode-switch button { flex:1; min-width:130px; }
.training-mode-switch .selected { border-color:var(--accent, #78f0d5); background:rgba(120,240,213,.16); }
.weight-training-panel { display:grid; gap:14px; }
.weight-training-panel h3, .weight-training-panel p { margin:0; }
.weight-audio-grid { display:grid; gap:12px; }
.weight-audio-card { min-width:0; display:grid; gap:10px; padding:14px; border:1px solid rgba(120,240,213,.2); border-radius:var(--radius-md); background:rgba(7,17,32,.52); }
.weight-audio-card label { font-weight:600; }
.weight-audio-card audio { width:100%; min-width:0; height:44px; }
.weight-choice-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; }
.weight-choice-grid .full-width { grid-column:1/-1; }
#modelTrainingScreen button:disabled { opacity:.5; cursor:default; }
@media(max-width:390px) { .weight-choice-grid { grid-template-columns:1fr; } }