/* ==========================================================================
   Base Reset and Theme Declaration
   ========================================================================== */

:root {
  /* Outfit / Plus Jakarta Sans fonts fallback */
  --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-secondary: 'Plus Jakarta Sans', sans-serif;
  
  --transition-speed: 0.3s;
  --transition-bounce: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* --- Theme 1: Dark Nebula (Glassmorphism Dark) --- */
[data-theme="nebula"] {
  --bg-gradient: linear-gradient(135deg, #090615 0%, #120e2b 50%, #040209 100%);
  --text-primary: #f1ecff;
  --text-secondary: #a39bb8;
  
  --card-bg: rgba(255, 255, 255, 0.04);
  --card-border: 1px solid rgba(255, 255, 255, 0.08);
  --card-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  --card-blur: blur(16px);
  
  --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
  --accent-gradient-hover: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  --accent-color: #7c3aed;
  
  --cell-bg: rgba(255, 255, 255, 0.02);
  --cell-border: rgba(255, 255, 255, 0.06);
  --cell-hover-bg: rgba(255, 255, 255, 0.07);
  --cell-shadow: inset 0 2px 4px rgba(255, 255, 255, 0.02);
  
  --color-x: #ff4a76;
  --color-x-rgb: 255, 74, 118;
  --color-o: #00d2ff;
  --color-o-rgb: 0, 210, 255;
  --color-draw: #eab308;
  
  --winning-cell-bg-x: rgba(255, 74, 118, 0.15);
  --winning-cell-bg-o: rgba(0, 210, 255, 0.15);
  
  --glow-x: 0 0 20px rgba(255, 74, 118, 0.5);
  --glow-o: 0 0 20px rgba(0, 210, 255, 0.5);
}

/* --- Theme 2: Cyberpunk Neon --- */
[data-theme="cyberpunk"] {
  --bg-gradient: radial-gradient(circle at center, #020205 0%, #000000 100%);
  --text-primary: #00f2fe;
  --text-secondary: #8a9fc4;
  
  --card-bg: rgba(7, 10, 20, 0.85);
  --card-border: 1px solid #1b2742;
  --card-shadow: 0 0 20px rgba(0, 242, 254, 0.08);
  --card-blur: blur(8px);
  
  --accent-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --accent-gradient-hover: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --accent-color: #00f2fe;
  
  --cell-bg: #03060f;
  --cell-border: #131b2e;
  --cell-hover-bg: #091024;
  --cell-shadow: none;
  
  --color-x: #ff007f;
  --color-x-rgb: 255, 0, 127;
  --color-o: #00f2fe;
  --color-o-rgb: 0, 242, 254;
  --color-draw: #ffd700;
  
  --winning-cell-bg-x: rgba(255, 0, 127, 0.2);
  --winning-cell-bg-o: rgba(0, 242, 254, 0.2);
  
  --glow-x: 0 0 25px #ff007f, 0 0 5px #ff007f;
  --glow-o: 0 0 25px #00f2fe, 0 0 5px #00f2fe;
}

/* --- Theme 3: Aura Pastel (Light Mode) --- */
[data-theme="pastel"] {
  --bg-gradient: linear-gradient(135deg, #e0e7ff 0%, #f3e8ff 50%, #fdf2f8 100%);
  --text-primary: #1e1b4b;
  --text-secondary: #6366f1;
  
  --card-bg: rgba(255, 255, 255, 0.65);
  --card-border: 1px solid rgba(255, 255, 255, 0.5);
  --card-shadow: 0 10px 30px rgba(99, 102, 241, 0.06);
  --card-blur: blur(12px);
  
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --accent-gradient-hover: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
  --accent-color: #6366f1;
  
  --cell-bg: #ffffff;
  --cell-border: rgba(99, 102, 241, 0.1);
  --cell-hover-bg: #f5f3ff;
  --cell-shadow: 0 4px 10px rgba(99, 102, 241, 0.03);
  
  --color-x: #f43f5e;
  --color-x-rgb: 244, 63, 94;
  --color-o: #3b82f6;
  --color-o-rgb: 59, 130, 246;
  --color-draw: #d97706;
  
  --winning-cell-bg-x: rgba(244, 63, 94, 0.1);
  --winning-cell-bg-o: rgba(59, 130, 246, 0.1);
  
  --glow-x: 0 4px 12px rgba(244, 63, 94, 0.3);
  --glow-o: 0 4px 12px rgba(59, 130, 246, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Confetti Canvas */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1000;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.app-container {
  width: 100%;
  max-width: 500px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 10;
}

/* ==========================================================================
   Header Component
   ========================================================================== */

.header {
  text-align: center;
}

.logo-text {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.subtitle {
  font-family: var(--font-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ==========================================================================
   Controls Panel (Glassmorphism Card)
   ========================================================================== */

.controls-panel {
  background: var(--card-bg);
  border: var(--card-border);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--card-shadow);
  backdrop-filter: var(--card-blur);
  -webkit-backdrop-filter: var(--card-blur);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  transition: all var(--transition-speed) ease;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: opacity 0.3s ease;
}

.control-group.hidden {
  display: none;
  opacity: 0;
}

.control-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

/* Custom Select Dropdowns */
.custom-select-wrapper {
  position: relative;
}

.custom-select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 10px 32px 10px 14px;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
}

[data-theme="pastel"] .custom-select {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(99, 102, 241, 0.15);
}

.custom-select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

/* Dropdown arrow */
.custom-select-wrapper::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 5px;
  background-color: var(--text-primary);
  clip-path: polygon(100% 0%, 0 0%, 50% 100%);
  pointer-events: none;
  opacity: 0.7;
}

/* Sound Control Button Customizer */
.sound-control {
  grid-column: span 2;
  align-items: center;
  flex-direction: row;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 12px;
  margin-top: 4px;
}

[data-theme="pastel"] .sound-control {
  border-top: 1px solid rgba(99, 102, 241, 0.08);
}

.icon-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  outline: none;
}

[data-theme="pastel"] .icon-btn {
  background: #ffffff;
  border: 1px solid rgba(99, 102, 241, 0.15);
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: scale(1.05);
  border-color: var(--accent-color);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.icon-btn svg.hidden {
  display: none;
}

/* ==========================================================================
   Main Game Area
   ========================================================================== */

.game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

/* Turn Indicator Banner */
.turn-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card-bg);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  backdrop-filter: var(--card-blur);
  -webkit-backdrop-filter: var(--card-blur);
  border-radius: 999px;
  padding: 8px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-speed) ease;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-color);
  animation: pulseGlow 1.6s infinite ease-in-out;
}

/* Grid Board */
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
  aspect-ratio: 1;
  background: rgba(0, 0, 0, 0.15);
  padding: 12px;
  border-radius: 24px;
  border: var(--card-border);
  box-shadow: inset 0 4px 10px rgba(0, 0, 0, 0.2);
}

[data-theme="pastel"] .board {
  background: rgba(99, 102, 241, 0.03);
  box-shadow: inset 0 2px 8px rgba(99, 102, 241, 0.05);
}

/* Grid Cell Buttons */
.cell {
  background: var(--cell-bg);
  border: 1px solid var(--cell-border);
  border-radius: 16px;
  box-shadow: var(--cell-shadow);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-speed) var(--transition-bounce),
              transform 0.15s ease,
              border-color 0.25s ease,
              box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
  outline: none;
  aspect-ratio: 1;
}

.cell::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.cell:hover {
  background-color: var(--cell-hover-bg);
  transform: scale(1.03) translateY(-2px);
  border-color: rgba(255, 255, 255, 0.15);
}

[data-theme="pastel"] .cell:hover {
  border-color: rgba(99, 102, 241, 0.25);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.05);
}

.cell:active {
  transform: scale(0.97) translateY(0);
}

.cell:hover::after {
  opacity: 1;
}

/* Cells that have markers placed */
.cell.marked {
  cursor: default;
  pointer-events: none;
}

.cell.marked:hover {
  transform: none;
}

/* Winning combination highlight classes */
.cell.win-highlight-x {
  background-color: var(--winning-cell-bg-x);
  border-color: var(--color-x);
  box-shadow: var(--glow-x);
  animation: pulseWinCell 1.5s infinite ease-in-out;
}

.cell.win-highlight-o {
  background-color: var(--winning-cell-bg-o);
  border-color: var(--color-o);
  box-shadow: var(--glow-o);
  animation: pulseWinCell 1.5s infinite ease-in-out;
}

/* --- SVG Drawing Animations for X and O --- */
.mark-svg {
  width: 65%;
  height: 65%;
}

.x-svg path {
  fill: none;
  stroke: var(--color-x);
  stroke-width: 12;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 6px rgba(var(--color-x-rgb), 0.4));
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
}

.x-svg .path-1 {
  animation: drawLine 0.25s ease-out forwards;
}

.x-svg .path-2 {
  animation: drawLine 0.25s ease-out 0.12s forwards;
}

.o-svg circle {
  fill: none;
  stroke: var(--color-o);
  stroke-width: 12;
  stroke-linecap: round;
  filter: drop-shadow(0 0 6px rgba(var(--color-o-rgb), 0.4));
  stroke-dasharray: 240;
  stroke-dashoffset: 240;
  animation: drawCircle 0.35s ease-out forwards;
}

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

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

/* Board Footer Buttons */
.board-footer {
  width: 100%;
}

.primary-btn {
  width: 100%;
  background: var(--accent-gradient);
  border: none;
  border-radius: 14px;
  color: #ffffff;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 700;
  padding: 14px 28px;
  cursor: pointer;
  transition: all 0.25s var(--transition-bounce);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
  outline: none;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.primary-btn:hover {
  background: var(--accent-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--color-o-rgb), 0.15);
}

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

/* ==========================================================================
   Scoreboard Statistics Panel
   ========================================================================== */

.stats-panel {
  background: var(--card-bg);
  border: var(--card-border);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--card-shadow);
  backdrop-filter: var(--card-blur);
  -webkit-backdrop-filter: var(--card-blur);
  text-align: center;
}

.stats-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.score-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.score-card {
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 12px;
  padding: 12px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  transition: all 0.3s ease;
}

[data-theme="pastel"] .score-card {
  background: #ffffff;
  border: 1px solid rgba(99, 102, 241, 0.08);
}

.score-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 3px;
  border-radius: 0 0 99px 99px;
}

.score-card.player-x::before {
  background-color: var(--color-x);
}

.score-card.ties::before {
  background-color: var(--color-draw);
}

.score-card.player-o::before {
  background-color: var(--color-o);
}

.player-label {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.player-subtext {
  font-size: 0.65rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 6px;
}

.score-value {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.1;
}

.score-card.player-x .score-value { color: var(--color-x); }
.score-card.ties .score-value { color: var(--color-draw); }
.score-card.player-o .score-value { color: var(--color-o); }

/* ==========================================================================
   Footer Component
   ========================================================================== */

.footer {
  text-align: center;
  margin-top: 10px;
}

.dev-card {
  background: var(--card-bg);
  border: var(--card-border);
  border-radius: 16px;
  padding: 16px 20px;
  box-shadow: var(--card-shadow);
  backdrop-filter: var(--card-blur);
  -webkit-backdrop-filter: var(--card-blur);
  display: inline-block;
  max-width: 100%;
}

.dev-signature {
  font-size: 0.85rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}

.copyright {
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.25s var(--transition-bounce);
}

[data-theme="pastel"] .social-link {
  background: #ffffff;
  border: 1px solid rgba(99, 102, 241, 0.12);
}

.social-link:hover {
  transform: translateY(-3px) scale(1.1);
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.social-link svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* ==========================================================================
   Winner Celebration Overlay Modal
   ========================================================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 1;
  transition: opacity 0.3s ease;
}

[data-theme="pastel"] .modal-overlay {
  background: rgba(99, 102, 241, 0.15);
}

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

.modal-content {
  background: var(--card-bg);
  border: var(--card-border);
  border-radius: 28px;
  padding: 36px 24px;
  width: 90%;
  max-width: 380px;
  text-align: center;
  box-shadow: var(--card-shadow);
  backdrop-filter: var(--card-blur);
  -webkit-backdrop-filter: var(--card-blur);
  transform: scale(1);
  animation: modalEntrance 0.4s var(--transition-bounce) forwards;
}

@keyframes modalEntrance {
  from {
    transform: scale(0.85);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-icon-wrapper {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.modal-icon-wrapper .mark-svg {
  width: 55px;
  height: 55px;
}

#game-over-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

#game-over-text {
  font-family: var(--font-secondary);
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Play again special glow effects */
.pulse-glow {
  position: relative;
  box-shadow: 0 0 20px rgba(var(--color-x-rgb), 0.15);
  animation: btnGlow 2.5s infinite alternate;
}

@keyframes btnGlow {
  0% {
    box-shadow: 0 0 10px rgba(124, 58, 237, 0.2);
  }
  100% {
    box-shadow: 0 0 25px rgba(124, 58, 237, 0.5), 0 0 5px rgba(124, 58, 237, 0.2);
  }
}

/* ==========================================================================
   Micro-animations & Special States
   ========================================================================== */

@keyframes pulseGlow {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 0 0px rgba(124, 58, 237, 0.4);
  }
  50% {
    transform: scale(1.15);
    box-shadow: 0 0 10px 4px rgba(124, 58, 237, 0.2);
  }
}

@keyframes pulseWinCell {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
}

/* Media Queries for Small Mobile screens */
@media (max-width: 380px) {
  .app-container {
    padding: 12px;
    gap: 16px;
  }
  
  .logo-text {
    font-size: 2.2rem;
  }
  
  .controls-panel {
    padding: 14px;
    gap: 12px;
  }
  
  .board {
    gap: 8px;
    padding: 8px;
    border-radius: 18px;
  }
  
  .cell {
    border-radius: 12px;
  }
}