/* ==========================================================================
   Tic Tac Toe - Cyberpunk Neon Styling
   ========================================================================== */

:root {
  --bg-dark: #070913;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --border-glass: rgba(255, 255, 255, 0.1);
  --border-glass-bright: rgba(255, 255, 255, 0.2);

  --color-cyan: #00f0ff;
  --color-pink: #ff007f;
  --color-yellow: #ffb800;
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;

  --glow-cyan: 0 0 15px rgba(0, 240, 255, 0.5), 0 0 30px rgba(0, 240, 255, 0.2);
  --glow-pink: 0 0 15px rgba(255, 0, 127, 0.5), 0 0 30px rgba(255, 0, 127, 0.2);
  --glow-yellow: 0 0 15px rgba(255, 184, 0, 0.5);

  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-secondary: 'Plus Jakarta Sans', sans-serif;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

[data-theme="light"] {
  --bg-dark: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(241, 245, 249, 0.95);
  --border-glass: rgba(0, 0, 0, 0.08);
  --border-glass-bright: rgba(0, 0, 0, 0.15);
  --color-text-main: #0f172a;
  --color-text-muted: #475569;
}

/* Reset & Base Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--color-text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  position: relative;
  transition: background-color 0.3s ease, color 0.3s ease;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(0, 240, 255, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(255, 0, 127, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(11, 15, 25, 0.95) 0%, var(--bg-dark) 100%);
}

[data-theme="light"] body {
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(0, 240, 255, 0.15) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(255, 0, 127, 0.15) 0%, transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.95) 0%, var(--bg-dark) 100%);
}

.theme-toggle-btn {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  background-color: var(--bg-card);
  color: var(--color-text-main);
  border: 1px solid var(--border-glass-bright);
  border-radius: 30px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transition: all 0.25s ease;
  z-index: 9999;
  backdrop-filter: blur(10px);
}

.theme-toggle-btn:hover {
  transform: translateY(-2px);
  border-color: var(--color-cyan);
  box-shadow: var(--glow-cyan);
}

/* Canvas background overlay for confetti */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 100;
}

/* App Main Container */
.app-container {
  width: 100%;
  max-width: 480px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  z-index: 1;
}

/* Header */
.app-header {
  text-align: center;
}

.game-title {
  font-size: clamp(2rem, 6vw, 2.75rem);
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.1;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.highlight-cyan {
  color: var(--color-cyan);
  text-shadow: var(--glow-cyan);
}

.highlight-pink {
  color: var(--color-pink);
  text-shadow: var(--glow-pink);
}

.game-subtitle {
  font-size: 0.85rem;
  font-family: var(--font-secondary);
  color: var(--color-text-muted);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-top: 4px;
}

/* Controls Bar */
.controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.control-label {
  font-size: 0.7rem;
  font-family: var(--font-secondary);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.select-wrapper {
  position: relative;
  width: 100%;
}

.custom-select {
  width: 100%;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-glass);
  color: var(--color-text-main);
  padding: 8px 10px;
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.custom-select:hover, .custom-select:focus {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(0, 0, 0, 0.5);
}

.custom-select option {
  background-color: #111827;
  color: #fff;
  padding: 10px;
}

.control-actions {
  display: flex;
  gap: 8px;
  align-self: flex-end;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-glass);
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-glass-bright);
  transform: translateY(-2px);
}

.icon-btn.active {
  background: rgba(0, 240, 255, 0.2);
  border-color: var(--color-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.icon-btn.muted {
  opacity: 0.6;
  border-color: rgba(255, 255, 255, 0.05);
}

.icon-btn:active {
  transform: translateY(0);
}

/* Scoreboard */
.scoreboard {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.score-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: var(--transition-normal);
}

.score-card:hover {
  border-color: var(--border-glass-bright);
  transform: translateY(-2px);
}

.score-symbol {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 2px;
}

.symbol-x {
  color: var(--color-cyan);
  text-shadow: var(--glow-cyan);
}

.symbol-draw {
  color: var(--color-yellow);
  text-shadow: var(--glow-yellow);
}

.symbol-o {
  color: var(--color-pink);
  text-shadow: var(--glow-pink);
}

.score-label {
  font-size: 0.68rem;
  font-family: var(--font-secondary);
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--color-text-muted);
}

.score-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-top: 4px;
}

/* Status Banner */
.status-banner {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-glass);
  border-radius: 50px;
  padding: 8px 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  align-self: center;
  width: max-content;
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transition: var(--transition-fast);
}

.status-indicator.player-x {
  background-color: var(--color-cyan);
  box-shadow: var(--glow-cyan);
}

.status-indicator.player-o {
  background-color: var(--color-pink);
  box-shadow: var(--glow-pink);
}

.status-text {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* Board Container & 3x3 Grid */
.board-container {
  width: 100%;
  display: flex;
  justify-content: center;
}

.game-board {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 14px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 0 20px rgba(255, 255, 255, 0.02);
}

/* Cells */
.cell {
  background: rgba(10, 15, 29, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
  user-select: none;
  outline: none;
}

.cell:hover:not(.x):not(.o):not(.disabled) {
  background: rgba(30, 41, 59, 0.7);
  border-color: rgba(255, 255, 255, 0.2);
  transform: scale(1.02);
}

.cell.disabled {
  cursor: not-allowed;
}

/* Cell SVG Mark Styling */
.cell svg {
  width: 60%;
  height: 60%;
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
  animation: drawStroke 0.35s ease-out forwards;
}

@keyframes drawStroke {
  to {
    stroke-dashoffset: 0;
  }
}

.cell.x svg path {
  stroke: var(--color-cyan);
  filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.8));
}

.cell.o svg circle {
  stroke: var(--color-pink);
  filter: drop-shadow(0 0 8px rgba(255, 0, 127, 0.8));
}

/* Win pulse cell animation */
.cell.win-cell {
  animation: winPulse 1s infinite alternate cubic-bezier(0.4, 0, 0.2, 1);
}

.cell.win-cell.x {
  background: rgba(0, 240, 255, 0.15);
  border-color: var(--color-cyan);
  box-shadow: inset 0 0 15px rgba(0, 240, 255, 0.3);
}

.cell.win-cell.o {
  background: rgba(255, 0, 127, 0.15);
  border-color: var(--color-pink);
  box-shadow: inset 0 0 15px rgba(255, 0, 127, 0.3);
}

@keyframes winPulse {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.04);
  }
}

/* Win SVG Line Overlay */
.win-line-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
  overflow: visible;
}

#win-line {
  stroke: #ffffff;
  stroke-width: 6;
  opacity: 0;
  transition: stroke-dashoffset 0.4s ease, opacity 0.2s ease;
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.9));
}

#win-line.line-x {
  stroke: var(--color-cyan);
  filter: drop-shadow(0 0 12px var(--color-cyan));
}

#win-line.line-o {
  stroke: var(--color-pink);
  filter: drop-shadow(0 0 12px var(--color-pink));
}

/* Footer & Action Buttons */
.app-footer {
  display: flex;
  justify-content: center;
}

.primary-btn {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(255, 0, 127, 0.2));
  border: 1px solid var(--border-glass-bright);
  color: var(--color-text-main);
  padding: 14px 28px;
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  border-radius: 50px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition-normal);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.primary-btn:hover {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.35), rgba(255, 0, 127, 0.35));
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
  transform: translateY(-2px);
}

.primary-btn:active {
  transform: translateY(0);
}

.primary-btn.pulse {
  animation: pulseGlow 2s infinite alternate;
}

@keyframes pulseGlow {
  from {
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
  }
  to {
    box-shadow: 0 0 30px rgba(255, 0, 127, 0.7);
  }
}

/* Victory / Game Over Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(5, 8, 18, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-glass-bright);
  border-radius: 24px;
  padding: 36px 32px;
  text-align: center;
  max-width: 360px;
  width: 90%;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: scale(1);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.hidden .modal-content {
  transform: scale(0.85);
}

.modal-badge {
  font-size: 0.75rem;
  font-family: var(--font-secondary);
  font-weight: 800;
  letter-spacing: 3px;
  padding: 4px 14px;
  border-radius: 20px;
  background: rgba(0, 240, 255, 0.15);
  color: var(--color-cyan);
  border: 1px solid rgba(0, 240, 255, 0.3);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.modal-badge.badge-pink {
  background: rgba(255, 0, 127, 0.15);
  color: var(--color-pink);
  border-color: rgba(255, 0, 127, 0.3);
}

.modal-badge.badge-draw {
  background: rgba(255, 184, 0, 0.15);
  color: var(--color-yellow);
  border-color: rgba(255, 184, 0, 0.3);
}

.modal-title {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.modal-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* Responsive adjustments */
@media (max-width: 420px) {
  .app-container {
    padding: 16px 12px;
    gap: 16px;
  }

  .controls-bar {
    padding: 10px 12px;
  }

  .game-board {
    gap: 10px;
    padding: 12px;
  }

  .primary-btn {
    padding: 12px 22px;
    font-size: 0.85rem;
  }
}