/* ==========================================================================
   Base & Design Tokens
   ========================================================================== */
:root {
  --bg-primary: #0a0d14;
  --bg-cabinet: #141923;
  --bg-screen: #0b1118;
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-highlight: rgba(255, 255, 255, 0.25);
  --glass-card-bg: rgba(20, 27, 40, 0.65);
  --glass-card-border: rgba(255, 255, 255, 0.1);

  --font-title: 'Orbitron', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --accent-cyan: #00f2fe;
  --accent-neon-green: #00f076;
  --accent-orange: #ff9f1c;
  --accent-purple: #c084fc;

  --board-cols: 10;
  --board-rows: 20;
  --cell-size: 30px; /* Dynamically adjusted via media queries or JS */
  --sup-cell-size: 16px;
  --board-width: calc(var(--board-cols) * var(--cell-size));
  --board-height: calc(var(--board-rows) * var(--cell-size));

  --cabinet-radius: 24px;
  --screen-radius: 16px;
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  width: 100%;
  height: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--bg-primary);
  color: #f0f4f8;
  font-family: var(--font-main);
  overflow: hidden;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Top Floating Navigation Bar (Desktop Only)
   ========================================================================== */
.top-nav-bar {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(14, 20, 32, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 9999px;
  padding: 6px 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  white-space: nowrap;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-badge {
  font-family: var(--font-title);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
  padding: 2px 6px;
  border-radius: 4px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.25), rgba(79, 172, 254, 0.15));
  border: 1px solid rgba(0, 242, 254, 0.4);
  color: var(--accent-cyan);
}

.nav-title {
  font-family: var(--font-title);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(180deg, #ffffff 0%, #a0aec0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-pill-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  border-radius: 9999px;
  padding: 4px 12px;
  font-family: var(--font-main);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.nav-pill-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(0, 242, 254, 0.5);
  transform: translateY(-1px);
}

.nav-icon-btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #cbd5e1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-icon-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  transform: translateY(-1px);
}

/* Hide on mobile devices so it doesn't intrude into mobile gaming */
@media (max-width: 768px) {
  .top-nav-bar {
    display: none !important;
  }
}

/* ==========================================================================
   Dynamic Ambient Background Orbs
   ========================================================================== */
.ambient-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  animation: floatOrb 20s infinite alternate ease-in-out;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #00f2fe 0%, #4facfe 70%);
  top: -100px;
  left: 10%;
  animation-duration: 22s;
}

.orb-2 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #7928ca 0%, #ff0080 70%);
  bottom: -120px;
  right: 10%;
  animation-duration: 26s;
  animation-delay: -5s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #00f076 0%, #00b4d8 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.2;
  animation-duration: 30s;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.1); }
  100% { transform: translate(-30px, -20px) scale(0.95); }
}

/* ==========================================================================
   Arcade Cabinet / Game Container
   ========================================================================== */
.arcade-cabinet {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 24px;
  background: linear-gradient(165deg, rgba(28, 36, 52, 0.75) 0%, rgba(15, 20, 30, 0.85) 100%);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid var(--border-glass);
  border-radius: var(--cabinet-radius);
  box-shadow: 
    0 24px 64px rgba(0, 0, 0, 0.6),
    inset 0 1px 1px rgba(255, 255, 255, 0.2),
    inset 0 0 20px rgba(0, 242, 254, 0.05);
  max-width: 960px;
  margin: 12px auto;
}

/* Header */
.cabinet-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-badge {
  font-family: var(--font-title);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  padding: 3px 8px;
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.25), rgba(79, 172, 254, 0.15));
  border: 1px solid rgba(0, 242, 254, 0.4);
  color: var(--accent-cyan);
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.6);
}

.game-title {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 4px;
  background: linear-gradient(180deg, #ffffff 0%, #a0aec0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #cbd5e1;
  border-radius: 10px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.icon-btn:active {
  transform: translateY(1px);
}

.hidden {
  display: none !important;
}

/* ==========================================================================
   Cabinet Body & Panels Layout
   ========================================================================== */
.cabinet-body {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 150px;
}

/* Glass Card Component */
.glass-card {
  background: var(--glass-card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-card-border);
  border-radius: 14px;
  padding: 14px;
  box-shadow: 
    0 8px 24px rgba(0, 0, 0, 0.35),
    inset 0 1px 1px rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: border-color var(--transition-fast);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.card-label {
  font-family: var(--font-title);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: #94a3b8;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.card-hint {
  font-size: 11px;
  color: #64748b;
  margin-top: 8px;
}

/* Preview Box (Hold & Next) */
.preview-box {
  width: 90px;
  height: 90px;
  display: grid;
  grid-template-columns: repeat(4, 20px);
  grid-template-rows: repeat(4, 20px);
  gap: 2px;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* Stats items */
.stat-item {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 8px;
}

.stat-item:last-child {
  margin-bottom: 0;
}

.stat-label {
  font-family: var(--font-title);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: #64748b;
  margin-bottom: 2px;
}

.stat-val {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
}

.score-glow {
  color: var(--accent-neon-green);
  text-shadow: 0 0 12px rgba(0, 240, 118, 0.4);
}

.high-glow {
  color: var(--accent-cyan);
  text-shadow: 0 0 12px rgba(0, 242, 254, 0.4);
}

/* Controls Guide List */
.controls-guide-card {
  text-align: left;
  align-items: stretch;
}

.guide-list {
  list-style: none;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.guide-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #cbd5e1;
}

.guide-list span:first-child {
  font-family: monospace;
  font-size: 11px;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 1px 5px;
  border-radius: 4px;
}

.guide-desc {
  font-size: 11px;
  color: #94a3b8;
}

/* ==========================================================================
   Center: Screen & Matrix Board
   ========================================================================== */
.screen-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.screen-bezel {
  position: relative;
  width: var(--board-width);
  height: var(--board-height);
  background: var(--bg-screen);
  border-radius: var(--screen-radius);
  border: 2px solid rgba(255, 255, 255, 0.1);
  box-shadow: 
    0 16px 40px rgba(0, 0, 0, 0.7),
    inset 0 0 40px rgba(0, 0, 0, 0.9),
    inset 0 0 4px rgba(255, 255, 255, 0.2);
  overflow: hidden;
}

/* CRT Scanlines */
.scanlines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 25;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.22) 2px,
    rgba(0, 0, 0, 0.22) 4px
  );
  opacity: 0.6;
}

/* Grid Matrix */
.tetris-grid {
  position: relative;
  z-index: 10;
  width: var(--board-width);
  height: var(--board-height);
  display: grid;
  grid-template-columns: repeat(var(--board-cols), var(--cell-size));
  grid-template-rows: repeat(var(--board-rows), var(--cell-size));
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: var(--cell-size) var(--cell-size);
}

/* Particle Layer */
.particle-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 30;
}

/* ==========================================================================
   Modals (Pause & Game Over)
   ========================================================================== */
.game-modal {
  position: absolute;
  inset: 0;
  z-index: 40;
  background: rgba(8, 12, 18, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: modalFadeIn 0.25s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.modal-glass {
  background: rgba(22, 30, 46, 0.9);
  border: 1px solid var(--border-highlight);
  border-radius: 18px;
  padding: 24px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), inset 0 1px 1px rgba(255, 255, 255, 0.2);
  gap: 12px;
}

.modal-glass h3 {
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  color: #ffffff;
}

.gameover-title {
  color: #ff4757 !important;
  text-shadow: 0 0 16px rgba(255, 71, 87, 0.6);
}

.modal-glass p {
  font-size: 14px;
  color: #94a3b8;
}

.modal-glass kbd {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  color: var(--accent-cyan);
}

.gameover-stats {
  display: flex;
  gap: 20px;
  margin: 10px 0;
}

.modal-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.modal-stat span:first-child {
  font-size: 12px;
  color: #94a3b8;
}

.score-highlight {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 800;
  color: var(--accent-neon-green);
}

.high-score-highlight {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 800;
  color: var(--accent-cyan);
}

.glass-btn {
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 15px;
  padding: 10px 24px;
  border-radius: 10px;
  border: 1px solid var(--border-highlight);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.primary-btn {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #05101a;
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.4);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.6);
}

.primary-btn:active {
  transform: translateY(1px);
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.08);
  color: #e2e8f0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-1px);
}

.secondary-btn:active {
  transform: translateY(1px);
}