/* ==========================================================================
   CD Digital Chess — Customizable Digital Chess Clock
   Mobile-First, Fullscreen, Face-to-Face OTB Responsive Stylesheet
   ========================================================================== */

:root {
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  
  /* Midnight OLED Theme (Default) */
  --bg-app: #000000;
  --bg-clock-idle: #12141a;
  --bg-clock-active: #0a251b;
  --bg-clock-low: #3a1515;
  --border-clock: #232733;
  --border-active: #10b981;
  --border-low: #ef4444;
  --text-primary: #f8fafc;
  --text-muted: #64748b;
  --text-active: #34d399;
  --text-low: #f87171;
  --accent: #10b981;
  --accent-glow: rgba(16, 185, 129, 0.35);
  --hud-bg: rgba(18, 20, 26, 0.85);
  --hud-border: rgba(255, 255, 255, 0.12);
  --modal-bg: #161a23;
  --modal-border: #2e3547;
  --shadow-active: 0 0 35px var(--accent-glow);
}

/* --- THEMES --- */

/* 1. DGT Classic Tournament Amber LCD */
[data-theme="dgt"] {
  --bg-app: #181512;
  --bg-clock-idle: #26211c;
  --bg-clock-active: #3a2e15;
  --bg-clock-low: #421815;
  --border-clock: #4a3e31;
  --border-active: #f59e0b;
  --border-low: #ef4444;
  --text-primary: #fbbf24;
  --text-muted: #927e65;
  --text-active: #fcd34d;
  --text-low: #fca5a5;
  --accent: #f59e0b;
  --accent-glow: rgba(245, 158, 11, 0.35);
  --hud-bg: rgba(38, 33, 28, 0.9);
  --hud-border: rgba(245, 158, 11, 0.2);
  --modal-bg: #221d18;
  --modal-border: #4a3e31;
}

/* 2. Cyber Emerald / Slate */
[data-theme="cyber"] {
  --bg-app: #090d16;
  --bg-clock-idle: #111827;
  --bg-clock-active: #064e3b;
  --bg-clock-low: #450a0a;
  --border-clock: #1f2937;
  --border-active: #059669;
  --border-low: #dc2626;
  --text-primary: #e2e8f0;
  --text-muted: #64748b;
  --text-active: #6ee7b7;
  --text-low: #fca5a5;
  --accent: #10b981;
  --accent-glow: rgba(16, 185, 129, 0.4);
  --hud-bg: rgba(17, 24, 39, 0.9);
  --hud-border: rgba(255, 255, 255, 0.15);
  --modal-bg: #151e2e;
  --modal-border: #2d3748;
}

/* 3. Warm Wood / Studio */
[data-theme="wood"] {
  --bg-app: #1a120b;
  --bg-clock-idle: #2b1e16;
  --bg-clock-active: #442817;
  --bg-clock-low: #4a1515;
  --border-clock: #53392a;
  --border-active: #d97706;
  --border-low: #dc2626;
  --text-primary: #fef3c7;
  --text-muted: #a89078;
  --text-active: #fde68a;
  --text-low: #fca5a5;
  --accent: #d97706;
  --accent-glow: rgba(217, 119, 6, 0.35);
  --hud-bg: rgba(43, 30, 22, 0.92);
  --hud-border: rgba(217, 119, 6, 0.25);
  --modal-bg: #2d1f16;
  --modal-border: #5a3d2a;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-family);
  touch-action: manipulation;
}

/* --- APP SHELL --- */
.clock-shell {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  height: 100dvh;
  background-color: var(--bg-app);
  position: relative;
}

/* --- DESKTOP TOP HEADER (Hidden on mobile) --- */
.clock-desktop-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--hud-bg);
  border-bottom: 1px solid var(--hud-border);
  z-index: 50;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.05rem;
}

.header-brand svg {
  color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--hud-border);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.nav-link-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent);
}

/* --- CLOCK MAIN ARENA --- */
.clock-arena {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  width: 100%;
  height: 100%;
}

/* --- CLOCK HALF / TOUCH ZONE --- */
.clock-zone {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-clock-idle);
  position: relative;
  cursor: pointer;
  padding: 20px;
  transition: background-color 0.2s, box-shadow 0.2s, transform 0.05s;
  outline: none;
  border: none;
  width: 100%;
}

.clock-zone:active {
  filter: brightness(1.1);
}

/* Rotated Top Player (Opponent Face-to-Face in Portrait) */
.clock-zone-top {
  border-bottom: 2px solid var(--border-clock);
}

.clock-zone-top .clock-content {
  transform: rotate(180deg);
  transition: transform 0.25s ease;
}

/* When 180° rotation is disabled */
.clock-shell.is-unmirrored .clock-zone-top .clock-content {
  transform: rotate(0deg);
}

.clock-zone-bottom {
  border-top: 2px solid var(--border-clock);
}

/* Active Clock Zone Highlight */
.clock-zone.is-active {
  background-color: var(--bg-clock-active);
  box-shadow: inset 0 0 40px var(--accent-glow);
}

.clock-zone.is-active .time-digits {
  color: var(--text-active);
  text-shadow: 0 0 25px var(--accent-glow);
}

.clock-zone.is-active .player-badge {
  background-color: var(--accent);
  color: #000000;
  font-weight: 700;
}

/* Low Time State (<20s / <10s) */
.clock-zone.is-low-time {
  background-color: var(--bg-clock-low) !important;
}

.clock-zone.is-low-time .time-digits {
  color: var(--text-low) !important;
  animation: pulse-low 1.2s infinite ease-in-out;
}

@keyframes pulse-low {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Flagged State */
.clock-zone.is-flagged {
  background-color: #450a0a !important;
  border-color: #ef4444 !important;
}

.clock-zone.is-flagged .time-digits {
  color: #ef4444 !important;
}

/* --- CLOCK CONTENT WRAPPER --- */
.clock-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 600px;
  gap: 12px;
  pointer-events: none; /* Let the parent zone capture all taps */
}

/* Header row inside clock: Player name badge & moves */
.clock-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0 16px;
  max-width: 480px;
}

.player-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: clamp(0.75rem, 2.5vw, 0.95rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
  transition: background 0.2s, color 0.2s;
}

.moves-badge {
  font-size: clamp(0.75rem, 2.5vw, 0.95rem);
  font-weight: 500;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 10px;
  border-radius: 12px;
}

/* Large Time Digits */
.time-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  width: 100%;
}

.time-digits {
  font-family: var(--font-mono);
  font-size: clamp(4rem, 16vw, 8.5rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-primary);
  transition: color 0.15s ease, text-shadow 0.15s ease;
}

/* Delay Countdown Badge */
.delay-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(245, 158, 11, 0.2);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fbbf24;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: clamp(0.7rem, 2vw, 0.85rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  margin-top: -4px;
}

.delay-badge[hidden] {
  display: none !important;
}

/* Ready State Prompt */
.clock-prompt {
  font-size: clamp(0.75rem, 2.2vw, 0.9rem);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- CENTER HUD CONTROLS PILL --- */
.clock-hud {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--hud-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--hud-border);
  padding: 6px 12px;
  border-radius: 40px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  z-index: 40;
}

.hud-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  cursor: pointer;
  transition: transform 0.1s, background 0.15s, border-color 0.15s;
}

.hud-btn:active {
  transform: scale(0.92);
}

.hud-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent);
}

.hud-btn-primary {
  width: 52px;
  height: 52px;
  background: var(--accent);
  color: #000000;
  border: none;
}

.hud-btn-primary:hover {
  background: var(--text-active);
}

.hud-btn svg {
  width: 22px;
  height: 22px;
}

.hud-btn-primary svg {
  width: 26px;
  height: 26px;
}

/* --- FLAG FALL / TIME OUT OVERLAY --- */
.flag-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 60;
  gap: 20px;
  padding: 24px;
  text-align: center;
  animation: fadeIn 0.3s ease;
}

.flag-overlay[hidden] {
  display: none !important;
}

.flag-title {
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 800;
  color: #ef4444;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.flag-subtitle {
  font-size: clamp(1.1rem, 3.5vw, 1.6rem);
  color: var(--text-primary);
  font-weight: 600;
}

.flag-actions {
  display: flex;
  gap: 12px;
  margin-top: 10px;
}

.btn-primary {
  background: var(--accent);
  color: #000000;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 12px;
  border: none;
  font-size: 1.05rem;
  cursor: pointer;
  transition: transform 0.1s, opacity 0.15s;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-primary:active {
  transform: scale(0.96);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 12px;
  border: 1px solid var(--hud-border);
  font-size: 1.05rem;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
}

/* --- MODALS (Settings, Custom Builder, Shortcuts) --- */
.clock-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
  animation: fadeIn 0.2s ease;
}

.clock-modal-backdrop[hidden] {
  display: none !important;
}

.clock-modal {
  background: var(--modal-bg);
  border: 1px solid var(--modal-border);
  border-radius: 20px;
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  max-height: 90dvh;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--modal-border);
  position: sticky;
  top: 0;
  background: var(--modal-bg);
  z-index: 10;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

.modal-body {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.setting-section-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* Preset Chips Grid */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
}

.preset-chip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--modal-border);
  color: var(--text-primary);
  padding: 10px 8px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.preset-chip:hover {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.1);
}

.preset-chip.is-selected {
  background: var(--accent);
  color: #000000;
  border-color: var(--accent);
  font-weight: 700;
}

/* Theme selector pills */
.themes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.theme-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--modal-border);
  padding: 10px 14px;
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
}

.theme-pill.is-selected {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.1);
}

.theme-color-preview {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Sound Options */
.sound-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sound-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--modal-border);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
}

.sound-btn.is-selected {
  background: var(--accent);
  color: #000000;
  font-weight: 600;
  border-color: var(--accent);
}

/* Toggle Switches */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.setting-label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
}

.setting-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: 26px;
  transition: 0.2s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: 50%;
  transition: 0.2s;
}

input:checked + .slider {
  background-color: var(--accent);
}

input:checked + .slider:before {
  transform: translateX(22px);
  background-color: #000000;
}

/* Custom Time Builder Inputs */
.custom-inputs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.input-group label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
}

.input-field {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--modal-border);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 1rem;
  font-family: var(--font-mono);
  outline: none;
}

.input-field:focus {
  border-color: var(--accent);
}

/* Modal Footer */
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 22px;
  border-top: 1px solid var(--modal-border);
  background: var(--modal-bg);
  position: sticky;
  bottom: 0;
}

/* --- KEYBOARD SHORTCUTS TABLE --- */
.shortcuts-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.shortcut-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 8px;
}

.kbd-badge {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 3px 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.4);
}

/* --- RESPONSIVE BREAKPOINTS --- */

/* 1. Mobile Landscape & Tablet Landscape */
@media (min-aspect-ratio: 1/1) and (max-width: 1024px) {
  .clock-arena {
    flex-direction: row;
  }

  .clock-zone-top {
    border-bottom: none;
    border-right: 2px solid var(--border-clock);
  }

  .clock-zone-top .clock-content {
    transform: rotate(0deg); /* Facing player in landscape */
  }

  .clock-zone-bottom {
    border-top: none;
    border-left: 2px solid var(--border-clock);
  }

  .clock-hud {
    flex-direction: column;
    padding: 12px 6px;
  }
}

/* 2. Desktop Tournament Studio Console Mode (> 1024px) */
@media (min-width: 1025px) {
  .clock-desktop-header {
    display: flex;
  }

  .clock-shell:not(.is-fullscreen-app) .clock-arena {
    max-width: 1100px;
    max-height: 640px;
    margin: auto;
    flex-direction: row;
    border-radius: 28px;
    border: 2px solid var(--border-clock);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
    overflow: hidden;
  }

  .clock-shell:not(.is-fullscreen-app) .clock-zone-top {
    border-bottom: none;
    border-right: 2px solid var(--border-clock);
  }

  .clock-shell:not(.is-fullscreen-app) .clock-zone-top .clock-content {
    transform: rotate(0deg);
  }

  .clock-shell:not(.is-fullscreen-app) .clock-zone-bottom {
    border-top: none;
    border-left: 2px solid var(--border-clock);
  }

  .clock-shell:not(.is-fullscreen-app) .clock-hud {
    flex-direction: column;
    padding: 12px 6px;
  }

  /* Fullscreen Mode on Desktop */
  .clock-shell.is-fullscreen-app .clock-desktop-header {
    display: none;
  }

  .clock-shell.is-fullscreen-app .clock-arena {
    flex-direction: row;
  }

  .clock-shell.is-fullscreen-app .clock-zone-top {
    border-bottom: none;
    border-right: 2px solid var(--border-clock);
  }

  .clock-shell.is-fullscreen-app .clock-zone-top .clock-content {
    transform: rotate(0deg);
  }

  .clock-shell.is-fullscreen-app .clock-zone-bottom {
    border-top: none;
    border-left: 2px solid var(--border-clock);
  }

  .clock-shell.is-fullscreen-app .clock-hud {
    flex-direction: column;
    padding: 12px 6px;
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}