/* ===================== */
/* Base + Theme Variables */
/* ===================== */
:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --shadow-1: 0 6px 20px rgba(15, 23, 42, 0.08);
  --shadow-2: 0 10px 28px rgba(15, 23, 42, 0.12);
  --radius: 16px;

  --primary: #14529b;
  --primary-strong: #0f3f7a;
  --accent: #1d4ed8;

  --chip: #eef2f7;
  --ball: #0f4a8a;
  --ball-glow: rgba(15, 74, 138, 0.28);
  --called: #0b4a8f;
  --uncalled: #8a99b0;
  --badge-bg: rgba(255, 255, 255, 0.75);
  --badge-text: #0b1b2a;
  --badge-border: rgba(255, 255, 255, 0.85);
  --start-bg: #9fc0f2;
  --start-border: #7aa5e6;
  --danger: #b42318;
  --danger-border: #f04438;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1200px 400px at 10% -10%, rgba(20, 82, 155, 0.06), transparent 60%),
    radial-gradient(900px 500px at 100% -20%, rgba(15, 23, 42, 0.05), transparent 65%);
}

header {
  padding: 18px 16px 8px;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: 0.3px;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 16px 28px;
}

/* ===================== */
/* Current Call (Hero)   */
/* ===================== */
.current-section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 18px;
}

#currentCall {
  width: clamp(200px, 28vw, 320px);
  aspect-ratio: 1;
  margin: 8px auto 16px;
  border-radius: 999px;
  background: var(--ball);
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 6px;
  font-size: clamp(54px, 7vw, 96px);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
  box-shadow:
    0 18px 36px rgba(15, 23, 42, 0.22),
    0 0 0 8px var(--ball-glow);
  position: relative;
  user-select: none;
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease;
  animation: callPulse 280ms ease;
}

#currentCall.is-clickable {
  cursor: pointer;
}

#currentCall.is-clickable:hover {
  transform: scale(1.01);
  box-shadow:
    0 20px 38px rgba(15, 23, 42, 0.24),
    0 0 0 10px var(--ball-glow);
}

#currentCall.is-clickable:focus-visible {
  outline: 4px solid rgba(20, 82, 155, 0.35);
  outline-offset: 6px;
}

#currentCall:not(.is-clickable) {
  cursor: default;
}

#currentCall::before {
  content: "";
  position: absolute;
  inset: 14%;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.22), transparent 55%);
  pointer-events: none;
}

.call-letter {
  position: static;
  margin: 0;
  padding: 0;
  background: none;
  border: 0;
  box-shadow: none;
  color: #ffffff;
  font-size: clamp(54px, 7vw, 96px);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1;
}

.call-number {
  font-size: clamp(54px, 7vw, 96px);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
}

#currentCall.is-empty .call-letter {
  display: none;
}

#currentCall.is-empty .call-number {
  font-size: clamp(24px, 4vw, 36px);
  letter-spacing: 0.02em;
}

@keyframes callPulse {
  from { transform: scale(0.97); opacity: 0.86; }
  to { transform: scale(1); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  #currentCall { animation: none; transition: none; }
}

/* ===================== */
/* Controls Toolbar       */
/* ===================== */
.controls-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  align-items: center;
  justify-content: space-between;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow-1);
}

.controls-left,
.controls-right,
.controls-voice {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.controls-left {
  flex: 1 1 520px;
}

.controls-voice {
  flex: 1 1 340px;
  min-width: 300px;
}

.controls-right {
  flex: 0 0 auto;
  white-space: nowrap;
}

button {
  appearance: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 12px;
  padding: 12px 18px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  min-height: 44px;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.06);
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

button:hover { transform: translateY(-1px); }
button:active { transform: translateY(0); }
button:focus { outline: 3px solid rgba(20, 82, 155, 0.25); outline-offset: 2px; }

#nextBtn {
  background: var(--primary);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-2);
}

#autoplayBtn {
  border-color: var(--primary);
  color: var(--primary);
  background: #fff;
}

#startBtn {
  background: var(--start-bg);
  border-color: var(--start-border);
  color: var(--text);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.12);
}

#startBtn {
  display: none;
}

#resetBtn {
  background: transparent;
  border-color: var(--danger-border);
  color: var(--danger);
}

button.primary {
  background: var(--primary-strong);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-2);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

label {
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}

select {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-weight: 700;
  background: #fff;
  min-height: 44px;
}

#voiceSelect {
  min-width: 240px;
  flex: 1 1 240px;
}

#intervalSelect {
  min-width: 90px;
}

.toggle-switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.toggle-track {
  position: relative;
  width: 46px;
  height: 26px;
  border-radius: 999px;
  background: #e5e7eb;
  border: 1px solid var(--border);
  transition: background 140ms ease, border-color 140ms ease;
}

.toggle-track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.2);
  transition: transform 140ms ease;
}

#voiceToggle:focus-visible + .toggle-track {
  outline: 3px solid rgba(20, 82, 155, 0.35);
  outline-offset: 2px;
}

#voiceToggle:checked + .toggle-track {
  background: var(--primary);
  border-color: transparent;
}

#voiceToggle:checked + .toggle-track::after {
  transform: translateX(20px);
}

.voice-disabled {
  opacity: 0.5;
}

#voiceToggle {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

#darkModeToggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

#darkModeToggle::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: #fff;
  box-shadow: inset 0 0 0 2px var(--muted);
}

.remaining-count {
  margin-top: 10px;
  text-align: center;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.2px;
}

/* ===================== */
/* Panels + Previous Calls */
/* ===================== */
.panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}

@media (min-width: 980px) {
  .panels { grid-template-columns: 320px 1fr; }
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 16px;
}

.panel h3 {
  margin: 0 0 12px;
  font-size: 16px;
  color: var(--muted);
  letter-spacing: 0.2px;
}

#calledList {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  overflow: hidden;
}

#calledList .called-item {
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--chip);
  color: var(--text);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.5px;
  border: 1px solid var(--border);
}

#calledList .called-item:nth-child(1) {
  background: var(--primary);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-2);
}

#calledList .called-item:nth-child(2) { opacity: 0.88; }
#calledList .called-item:nth-child(3) { opacity: 0.76; }
#calledList .called-item:nth-child(4) { opacity: 0.68; }
#calledList .called-item:nth-child(5) { opacity: 0.6; }
#calledList .called-item:nth-child(n+6) { display: none; }

.muted {
  color: var(--muted);
  font-weight: 600;
}

/* ===================== */
/* Bingo Grid             */
/* ===================== */
.bingo-grid {
  width: 100%;
}

.bingo-header {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}

.bingo-header-cell {
  text-align: center;
  padding: 12px 0;
  border-radius: 12px;
  background: #111827;
  color: #fff;
  font-weight: 800;
  letter-spacing: 2px;
}

.bingo-body {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.bingo-cell {
  padding: 12px 0;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #f2f4f8;
  font-weight: 800;
  font-size: 18px;
  text-align: center;
  color: var(--uncalled);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
}

.bingo-cell.called {
  background: var(--primary);
  border-color: var(--primary-strong);
  color: #ffffff;
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, 0.35),
    inset 0 -2px 6px rgba(15, 23, 42, 0.2);
}

:root.theme-light .bingo-cell.called {
  background: var(--primary);
  border-color: var(--primary-strong);
  color: #ffffff;
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, 0.35),
    inset 0 -2px 6px rgba(15, 23, 42, 0.2);
}

@media (prefers-color-scheme: light) {
  :root:not(.theme-dark) .bingo-cell.called {
    background: var(--primary);
    border-color: var(--primary-strong);
    color: #ffffff;
    box-shadow:
      inset 0 0 0 2px rgba(255, 255, 255, 0.35),
      inset 0 -2px 6px rgba(15, 23, 42, 0.2);
  }
}

/* ===================== */
/* Responsive Tweaks       */
/* ===================== */
@media (max-width: 560px) {
  #currentCall { width: clamp(180px, 60vw, 260px); }
  button { width: 100%; }
  .controls-bar { justify-content: center; }
  #calledList { justify-content: center; }
}

@media (max-width: 700px) {
  .controls-bar {
    justify-content: flex-start;
  }

  .controls-left,
  .controls-voice,
  .controls-right {
    flex: 1 1 100%;
  }

  .controls-right {
    justify-content: flex-start;
    gap: 10px;
  }

  #voiceSelect {
    min-width: 220px;
  }
}

/* ===================== */
/* Dark Mode               */
/* ===================== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --card: #0f172a;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: #1f2937;
    --shadow-1: 0 6px 20px rgba(2, 6, 23, 0.55);
    --shadow-2: 0 10px 28px rgba(2, 6, 23, 0.65);
    --chip: #111827;
    --ball: #1d4f91;
    --ball-glow: rgba(29, 79, 145, 0.25);
    --called: #1f5b99;
    --uncalled: #64748b;
    --badge-bg: rgba(255, 255, 255, 0.85);
    --badge-text: #0b1b2a;
    --badge-border: rgba(255, 255, 255, 0.7);
    --start-bg: #36507a;
    --start-border: #4b6aa1;
    --danger: #fda29b;
    --danger-border: #f97066;
  }

  body {
    background-image:
      radial-gradient(900px 400px at 10% -10%, rgba(29, 79, 145, 0.12), transparent 60%),
      radial-gradient(900px 500px at 100% -20%, rgba(2, 6, 23, 0.25), transparent 65%);
  }

  button, select {
    background: #0b1222;
    color: var(--text);
  }

  #autoplayBtn {
    background: #0b1222;
    color: #e2e8f0;
    border-color: #60a5fa;
  }

  button.primary {
    background: var(--primary);
    color: #ffffff;
    border-color: transparent;
  }

  #startBtn {
    background: var(--start-bg);
    border-color: var(--start-border);
    color: var(--text);
  }

  #resetBtn {
    background: transparent;
    border-color: var(--danger-border);
    color: var(--danger);
  }

  .bingo-header-cell { background: #111827; }
  .bingo-cell {
    background: #0a1220;
    border-color: #1f2a3a;
    color: #7f8fa3;
  }

  .bingo-cell.called {
    background: var(--primary);
    border-color: #5a7bb5;
    color: #ffffff;
    box-shadow:
      inset 0 0 0 2px rgba(255, 255, 255, 0.25),
      0 0 0 2px rgba(20, 82, 155, 0.35);
  }
}

:root.theme-dark {
  --bg: #0b1120;
  --card: #0f172a;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #1f2937;
  --shadow-1: 0 6px 20px rgba(2, 6, 23, 0.55);
  --shadow-2: 0 10px 28px rgba(2, 6, 23, 0.65);
  --chip: #111827;
  --ball: #1d4f91;
  --ball-glow: rgba(29, 79, 145, 0.25);
  --called: #1f5b99;
  --uncalled: #64748b;
  --badge-bg: rgba(255, 255, 255, 0.85);
  --badge-text: #0b1b2a;
  --badge-border: rgba(255, 255, 255, 0.7);
  --start-bg: #36507a;
  --start-border: #4b6aa1;
  --danger: #fda29b;
  --danger-border: #f97066;
}

:root.theme-dark body {
  background-image:
    radial-gradient(900px 400px at 10% -10%, rgba(29, 79, 145, 0.12), transparent 60%),
    radial-gradient(900px 500px at 100% -20%, rgba(2, 6, 23, 0.25), transparent 65%);
}

:root.theme-dark button,
:root.theme-dark select {
  background: #0b1222;
  color: var(--text);
}

:root.theme-dark #autoplayBtn {
  background: #0b1222;
  color: #e2e8f0;
  border-color: #60a5fa;
}

:root.theme-dark button.primary {
  background: var(--primary);
  color: #ffffff;
  border-color: transparent;
}

:root.theme-dark #startBtn {
  background: var(--start-bg);
  border-color: var(--start-border);
  color: var(--text);
}

:root.theme-dark #resetBtn {
  background: transparent;
  border-color: var(--danger-border);
  color: var(--danger);
}

:root.theme-dark .bingo-header-cell { background: #111827; }
:root.theme-dark .bingo-cell {
  background: #0a1220;
  border-color: #1f2a3a;
  color: #7f8fa3;
}

:root.theme-dark .bingo-cell.called {
  background: var(--primary);
  border-color: #5a7bb5;
  color: #ffffff;
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, 0.25),
    0 0 0 2px rgba(20, 82, 155, 0.35);
}

:root.theme-dark #darkModeToggle {
  background: var(--primary-strong);
  color: #fff;
  border-color: transparent;
}

:root.theme-dark #darkModeToggle::before {
  background: #fff;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35);
}

:root.theme-light {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --shadow-1: 0 6px 20px rgba(15, 23, 42, 0.08);
  --shadow-2: 0 10px 28px rgba(15, 23, 42, 0.12);
  --radius: 16px;
  --primary: #14529b;
  --primary-strong: #0f3f7a;
  --accent: #1d4ed8;
  --chip: #eef2f7;
  --ball: #0f4a8a;
  --ball-glow: rgba(15, 74, 138, 0.28);
  --called: #0b4a8f;
  --uncalled: #8a99b0;
  --badge-bg: rgba(255, 255, 255, 0.75);
  --badge-text: #0b1b2a;
  --badge-border: rgba(255, 255, 255, 0.85);
  --danger: #b42318;
  --danger-border: #f04438;
  --start-bg: #9fc0f2;
  --start-border: #7aa5e6;
}

:root.theme-light body {
  background-image:
    radial-gradient(1200px 400px at 10% -10%, rgba(20, 82, 155, 0.06), transparent 60%),
    radial-gradient(900px 500px at 100% -20%, rgba(15, 23, 42, 0.05), transparent 65%);
}

:root.theme-light button,
:root.theme-light select {
  background: #fff;
  color: var(--text);
}