/* ========================================
   STRING REALMS: THE KINGDOM OF PATTERNS
   Main Stylesheet
   ======================================== */

/* CSS Variables - Mystical Color Palette */
:root {
  /* Primary Colors */
  --color-bg-dark: #0a0a12;
  --color-bg-medium: #12121f;
  --color-bg-light: #1a1a2e;

  /* Accent Colors */
  --color-gold: #ffd700;
  --color-gold-dark: #b8860b;
  --color-gold-glow: rgba(255, 215, 0, 0.3);

  --color-cyan: #00ffff;
  --color-cyan-dark: #008b8b;
  --color-cyan-glow: rgba(0, 255, 255, 0.3);

  --color-purple: #9b59b6;
  --color-purple-dark: #6c3483;
  --color-purple-glow: rgba(155, 89, 182, 0.3);

  --color-emerald: #2ecc71;
  --color-emerald-dark: #27ae60;
  --color-emerald-glow: rgba(46, 204, 113, 0.3);

  --color-crimson: #e74c3c;
  --color-crimson-dark: #c0392b;

  --color-rune-blue: #3498db;
  --color-rune-orange: #e67e22;

  /* Text Colors */
  --color-text-primary: #f5f5f5;
  --color-text-secondary: #a0a0b0;
  --color-text-muted: #6c6c7c;

  /* Fonts */
  --font-title: 'Cinzel', serif;
  --font-ui: 'Rajdhani', sans-serif;
  --font-code: 'Fira Code', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-glow-gold:
    0 0 20px var(--color-gold-glow), 0 0 40px var(--color-gold-glow);
  --shadow-glow-cyan:
    0 0 20px var(--color-cyan-glow), 0 0 40px var(--color-cyan-glow);
  --shadow-glow-purple:
    0 0 20px var(--color-purple-glow), 0 0 40px var(--color-purple-glow);
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-ui);
  background: var(--color-bg-dark);
  color: var(--color-text-primary);
  line-height: 1.6;
}

/* ========================================
   Screen Management
   ======================================== */
.screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.screen.active {
  display: flex;
  opacity: 1;
}

/* ========================================
   Loading Screen
   ======================================== */
#loading-screen {
  background: linear-gradient(
    135deg,
    var(--color-bg-dark) 0%,
    #0d0d1a 50%,
    var(--color-bg-dark) 100%
  );
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.loading-content {
  text-align: center;
  z-index: 10;
}

.game-title {
  font-family: var(--font-title);
  font-size: 4rem;
  font-weight: 900;
  color: var(--color-gold);
  text-shadow:
    0 0 30px var(--color-gold-glow),
    0 0 60px var(--color-gold-glow),
    0 4px 0 var(--color-gold-dark);
  letter-spacing: 0.3em;
  animation: titlePulse 2s ease-in-out infinite;
}

.subtitle {
  font-family: var(--font-title);
  font-size: 1.2rem;
  color: var(--color-cyan);
  letter-spacing: 0.5em;
  margin-top: var(--spacing-md);
  text-shadow: 0 0 15px var(--color-cyan-glow);
}

.loading-bar {
  width: 300px;
  height: 4px;
  background: var(--color-bg-light);
  border-radius: 2px;
  margin: var(--spacing-xxl) auto;
  overflow: hidden;
  position: relative;
}

.loading-progress {
  height: 100%;
  width: 0%;
  background: linear-gradient(
    90deg,
    var(--color-cyan),
    var(--color-gold),
    var(--color-cyan)
  );
  background-size: 200% 100%;
  animation:
    shimmer 1.5s linear infinite,
    loadProgress 3s ease-out forwards;
  border-radius: 2px;
  box-shadow: var(--shadow-glow-cyan);
}

.loading-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.1em;
  animation: fadeInOut 2s ease-in-out infinite;
}

/* Floating Rune Particles */
.rune-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}

.rune-particles::before {
  content: 'A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9';
  position: absolute;
  font-family: var(--font-code);
  font-size: 20px;
  color: var(--color-purple-glow);
  white-space: nowrap;
  animation: floatRunes 30s linear infinite;
  opacity: 0.3;
}

/* ========================================
   Main Menu
   ======================================== */
#main-menu {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
}

.menu-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(
      ellipse at center top,
      rgba(155, 89, 182, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at center bottom,
      rgba(0, 255, 255, 0.1) 0%,
      transparent 50%
    ),
    linear-gradient(
      180deg,
      var(--color-bg-dark) 0%,
      var(--color-bg-medium) 50%,
      var(--color-bg-dark) 100%
    );
  overflow: hidden;
}

.floating-strings {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 50px,
      rgba(255, 215, 0, 0.02) 50px,
      rgba(255, 215, 0, 0.02) 51px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 50px,
      rgba(0, 255, 255, 0.02) 50px,
      rgba(0, 255, 255, 0.02) 51px
    );
  animation: gridMove 20s linear infinite;
}

.menu-content {
  z-index: 10;
  text-align: center;
  padding: var(--spacing-xl);
}

.title-container {
  margin-bottom: var(--spacing-xxl);
}

.main-title {
  font-family: var(--font-title);
  font-size: 5rem;
  font-weight: 900;
  background: linear-gradient(
    135deg,
    var(--color-gold) 0%,
    #fff 50%,
    var(--color-gold) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shineText 3s linear infinite;
  text-shadow: none;
  filter: drop-shadow(0 0 30px var(--color-gold-glow));
}

.main-subtitle {
  font-family: var(--font-title);
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--color-cyan);
  letter-spacing: 0.8em;
  text-shadow: 0 0 20px var(--color-cyan-glow);
  margin-top: var(--spacing-md);
}

.title-underline {
  width: 200px;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-gold),
    transparent
  );
  margin: var(--spacing-lg) auto;
}

/* Menu Buttons */
.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  margin-bottom: var(--spacing-xxl);
}

.menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  min-width: 300px;
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(
    135deg,
    rgba(26, 26, 46, 0.9) 0%,
    rgba(18, 18, 31, 0.9) 100%
  );
  border: 2px solid var(--color-gold-dark);
  border-radius: var(--radius-md);
  color: var(--color-gold);
  font-family: var(--font-title);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.menu-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 215, 0, 0.1),
    transparent
  );
  transition: left var(--transition-slow);
}

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

.menu-btn:hover::before {
  left: 100%;
}

.menu-btn.secondary {
  border-color: var(--color-text-muted);
  color: var(--color-text-secondary);
}

.menu-btn.secondary:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.btn-icon {
  font-size: 1.4rem;
}

/* Player Stats */
.player-stats {
  display: flex;
  gap: var(--spacing-xxl);
  justify-content: center;
}

.stat {
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-xs);
}

.stat-value {
  font-family: var(--font-title);
  font-size: 1.8rem;
  color: var(--color-gold);
  text-shadow: 0 0 10px var(--color-gold-glow);
}

/* ========================================
   Realm Select Screen
   ======================================== */
#realm-select {
  flex-direction: column;
  background: var(--color-bg-dark);
  padding: var(--spacing-xl);
}

.realm-select-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.realm-select-header h2 {
  font-family: var(--font-title);
  font-size: 2rem;
  color: var(--color-gold);
  letter-spacing: 0.2em;
}

.back-btn {
  background: transparent;
  border: 1px solid var(--color-text-muted);
  color: var(--color-text-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.back-btn:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

.realms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  padding: var(--spacing-md);
  flex: 1;
  overflow-y: auto;
}

.realm-card {
  background: linear-gradient(
    135deg,
    var(--color-bg-medium) 0%,
    var(--color-bg-light) 100%
  );
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.realm-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(255, 215, 0, 0.1) 0%,
    transparent 70%
  );
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.realm-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-gold);
  box-shadow: var(--shadow-glow-gold);
}

.realm-card:hover::before {
  opacity: 1;
}

.realm-card.locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.realm-card.locked:hover {
  transform: none;
  border-color: var(--color-text-muted);
  box-shadow: none;
}

.realm-card.completed {
  border-color: var(--color-emerald);
}

.realm-card.completed .realm-icon::after {
  content: '✓';
  position: absolute;
  top: -5px;
  right: -5px;
  font-size: 1rem;
  color: var(--color-emerald);
}

.realm-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.realm-card h3 {
  font-family: var(--font-title);
  font-size: 1.2rem;
  color: var(--color-gold);
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.realm-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.realm-difficulty {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: rgba(0, 255, 255, 0.1);
  color: var(--color-cyan);
  border: 1px solid var(--color-cyan-dark);
}

.realm-card[data-realm='5'] .realm-difficulty,
.realm-card[data-realm='6'] .realm-difficulty {
  background: rgba(255, 215, 0, 0.1);
  color: var(--color-gold);
  border-color: var(--color-gold-dark);
}

.realm-card[data-realm='7'] .realm-difficulty {
  background: rgba(231, 76, 60, 0.1);
  color: var(--color-crimson);
  border-color: var(--color-crimson-dark);
}

/* ========================================
   Algorithm Codex
   ======================================== */
#algorithm-codex {
  flex-direction: column;
  background: var(--color-bg-dark);
  padding: var(--spacing-xl);
}

.codex-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.codex-header h2 {
  font-family: var(--font-title);
  font-size: 2rem;
  color: var(--color-gold);
}

.codex-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.codex-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.codex-tab {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-bg-light);
  border: 1px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.codex-tab:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

.codex-tab.active {
  background: var(--color-cyan);
  border-color: var(--color-cyan);
  color: var(--color-bg-dark);
  font-weight: 600;
}

.codex-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
  background: var(--color-bg-medium);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-bg-light);
}

.codex-body h3 {
  font-family: var(--font-title);
  color: var(--color-gold);
  margin-bottom: var(--spacing-md);
}

.codex-body pre {
  font-family: var(--font-code);
  font-size: 0.85rem;
  background: var(--color-bg-dark);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border: 1px solid var(--color-bg-light);
}

.codex-body code {
  color: var(--color-cyan);
}

.codex-body p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

/* ========================================
   Game Screen
   ======================================== */
#game-screen {
  flex-direction: column;
  background:
    radial-gradient(
      ellipse at top,
      rgba(155, 89, 182, 0.1) 0%,
      transparent 50%
    ),
    linear-gradient(
      180deg,
      var(--color-bg-dark) 0%,
      var(--color-bg-medium) 100%
    );
}

/* Game Header */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-xl);
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--color-bg-light);
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.game-btn {
  width: 40px;
  height: 40px;
  background: var(--color-bg-light);
  border: 1px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.game-btn:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.realm-info {
  display: flex;
  flex-direction: column;
}

.realm-name {
  font-family: var(--font-title);
  font-size: 1rem;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

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

.score-display {
  text-align: center;
}

.score-label {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.2em;
}

.score-value {
  font-family: var(--font-title);
  font-size: 1.8rem;
  color: var(--color-gold);
  text-shadow: 0 0 10px var(--color-gold-glow);
}

.health-bar {
  width: 120px;
  height: 24px;
  background: var(--color-bg-dark);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-crimson-dark);
  position: relative;
  overflow: hidden;
}

.health-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(
    90deg,
    var(--color-crimson-dark),
    var(--color-crimson)
  );
  transition: width var(--transition-normal);
}

.health-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.8rem;
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.timer-display {
  font-family: var(--font-code);
  font-size: 1rem;
  color: var(--color-cyan);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-dark);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-cyan-dark);
}

/* Game Main Area */
.game-main {
  flex: 1;
  display: flex;
  padding: var(--spacing-lg);
  gap: var(--spacing-lg);
  overflow: hidden;
  position: relative;
}

/* Story Panel */
.story-panel {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(
    135deg,
    var(--color-bg-medium) 0%,
    var(--color-bg-dark) 100%
  );
  border: 2px solid var(--color-gold);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 600px;
  text-align: center;
  z-index: 100;
  box-shadow: var(--shadow-glow-gold);
  display: none;
}

.story-panel.active {
  display: block;
  animation: fadeInScale 0.3s ease-out;
}

.story-character {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  animation: float 3s ease-in-out infinite;
}

.story-text {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.story-continue {
  background: linear-gradient(
    135deg,
    var(--color-gold-dark),
    var(--color-gold)
  );
  border: none;
  color: var(--color-bg-dark);
  padding: var(--spacing-sm) var(--spacing-xl);
  border-radius: var(--radius-sm);
  font-family: var(--font-title);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.story-continue:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow-gold);
}

/* Game Arena */
.game-arena {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  background: var(--color-bg-medium);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--color-bg-light);
  position: relative;
  overflow: hidden;
}

#animation-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 50;
}

/* String Display */
.string-display-container {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-bg-dark);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-bg-light);
}

.string-label {
  font-family: var(--font-title);
  font-size: 0.9rem;
  color: var(--color-gold);
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-md);
}

.string-display {
  display: flex;
  justify-content: center;
  gap: 2px;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-sm);
}

.string-char {
  width: 40px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    var(--color-bg-light) 0%,
    var(--color-bg-medium) 100%
  );
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 1.4rem;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.string-char:hover {
  border-color: var(--color-cyan);
  background: var(--color-bg-light);
  transform: translateY(-2px);
}

.string-char.selected {
  border-color: var(--color-gold);
  background: linear-gradient(
    135deg,
    var(--color-gold-dark) 0%,
    var(--color-gold) 100%
  );
  color: var(--color-bg-dark);
  box-shadow: var(--shadow-glow-gold);
  animation: pulse 1s ease-in-out infinite;
}

.string-char.highlighted {
  border-color: var(--color-cyan);
  background: linear-gradient(
    135deg,
    var(--color-cyan-dark) 0%,
    var(--color-cyan) 100%
  );
  color: var(--color-bg-dark);
  box-shadow: var(--shadow-glow-cyan);
}

.string-char.palindrome {
  border-color: var(--color-purple);
  background: linear-gradient(
    135deg,
    var(--color-purple-dark) 0%,
    var(--color-purple) 100%
  );
  color: white;
  box-shadow: var(--shadow-glow-purple);
}

.string-char.correct {
  border-color: var(--color-emerald);
  background: linear-gradient(
    135deg,
    var(--color-emerald-dark) 0%,
    var(--color-emerald) 100%
  );
  color: var(--color-bg-dark);
}

.string-char.wrong {
  border-color: var(--color-crimson);
  background: linear-gradient(
    135deg,
    var(--color-crimson-dark) 0%,
    var(--color-crimson) 100%
  );
  color: white;
  animation: shake 0.5s ease;
}

.string-char.rune {
  background: linear-gradient(135deg, #1a1a3e 0%, #2a2a5e 100%);
  border-color: var(--color-rune-blue);
  box-shadow: 0 0 10px rgba(52, 152, 219, 0.3);
}

.string-char.rune.glowing {
  animation: runeGlow 1s ease-in-out infinite;
}

.string-indices {
  display: flex;
  justify-content: center;
  gap: 2px;
}

.string-index {
  width: 40px;
  font-family: var(--font-code);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* Pointer Container */
.pointer-container {
  position: relative;
  height: 40px;
  display: none;
}

.pointer-container.active {
  display: block;
}

.pointer {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: translateX(-50%);
  transition: left var(--transition-normal);
}

.pointer-label {
  font-family: var(--font-code);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.pointer-left .pointer-label {
  background: var(--color-cyan);
  color: var(--color-bg-dark);
}

.pointer-right .pointer-label {
  background: var(--color-gold);
  color: var(--color-bg-dark);
}

.pointer-arrow {
  font-size: 1.2rem;
}

.pointer-left .pointer-arrow {
  color: var(--color-cyan);
}

.pointer-right .pointer-arrow {
  color: var(--color-gold);
}

/* Challenge Area */
.challenge-area {
  text-align: center;
  padding: var(--spacing-lg);
  background: linear-gradient(
    135deg,
    rgba(155, 89, 182, 0.1) 0%,
    rgba(0, 255, 255, 0.05) 100%
  );
  border-radius: var(--radius-md);
  border: 1px solid var(--color-purple-dark);
}

.challenge-title {
  font-family: var(--font-title);
  font-size: 1.2rem;
  color: var(--color-purple);
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-sm);
}

.challenge-description {
  font-size: 1.1rem;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

.challenge-target {
  font-family: var(--font-code);
  font-size: 1.4rem;
  color: var(--color-gold);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-dark);
  border-radius: var(--radius-sm);
  display: inline-block;
}

/* Input Area */
.input-area {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
}

.range-selectors {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.range-input {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.range-input label {
  font-family: var(--font-code);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.range-input input {
  width: 60px;
  padding: var(--spacing-sm);
  background: var(--color-bg-dark);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-code);
  font-size: 1rem;
  text-align: center;
}

.range-input input:focus {
  outline: none;
  border-color: var(--color-cyan);
}

.action-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(
    135deg,
    var(--color-cyan-dark),
    var(--color-cyan)
  );
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-bg-dark);
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.action-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-cyan);
}

.action-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.text-input-area {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.text-input-area input {
  flex: 1;
  max-width: 400px;
  padding: var(--spacing-md);
  background: var(--color-bg-dark);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-code);
  font-size: 1rem;
}

.text-input-area input:focus {
  outline: none;
  border-color: var(--color-cyan);
}

/* Selection Area for Multiple Choice */
.selection-area {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

.selection-option {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-dark);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-code);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 100px;
  text-align: center;
}

.selection-option:hover {
  border-color: var(--color-cyan);
  transform: translateY(-2px);
}

.selection-option.selected {
  border-color: var(--color-gold);
  background: rgba(255, 215, 0, 0.1);
}

.selection-option.correct {
  border-color: var(--color-emerald);
  background: rgba(46, 204, 113, 0.2);
  animation: correctPulse 0.5s ease;
}

.selection-option.wrong {
  border-color: var(--color-crimson);
  background: rgba(231, 76, 60, 0.2);
  animation: shake 0.5s ease;
}

/* Result Display */
.result-display {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-bg-dark);
  border-radius: var(--radius-md);
  border: 2px dashed var(--color-text-muted);
  min-height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.result-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-sm);
}

.result-string {
  font-family: var(--font-code);
  font-size: 1.5rem;
  color: var(--color-emerald);
  min-height: 30px;
}

/* Visualization Area */
.visualization-area {
  background: var(--color-bg-dark);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-bg-light);
  display: none;
}

.visualization-area.active {
  display: block;
}

.vis-title {
  font-family: var(--font-title);
  font-size: 0.9rem;
  color: var(--color-purple);
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.vis-content {
  display: flex;
  justify-content: center;
  gap: 2px;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

.vis-cell {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-light);
  border: 1px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 0.9rem;
  color: var(--color-text-primary);
}

.vis-cell.active {
  border-color: var(--color-cyan);
  background: rgba(0, 255, 255, 0.1);
}

.vis-cell.highlight {
  border-color: var(--color-gold);
  background: rgba(255, 215, 0, 0.2);
}

.vis-steps {
  font-family: var(--font-code);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  max-height: 150px;
  overflow-y: auto;
  padding: var(--spacing-sm);
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-sm);
}

.vis-step {
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-bg-light);
}

.vis-step.current {
  color: var(--color-cyan);
  font-weight: 600;
}

/* Side Panel */
.side-panel {
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.hint-box,
.algorithm-box,
.complexity-box {
  background: var(--color-bg-medium);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-bg-light);
  overflow: hidden;
}

.hint-header,
.algo-header,
.complexity-header {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-light);
  font-family: var(--font-title);
  font-size: 0.9rem;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

.hint-content,
.complexity-content {
  padding: var(--spacing-md);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.algo-code {
  padding: var(--spacing-md);
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--color-cyan);
  overflow-x: auto;
  max-height: 200px;
  white-space: pre-wrap;
  margin: 0;
}

.complexity-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.complexity-content span {
  color: var(--color-cyan);
  font-family: var(--font-code);
}

/* Game Footer */
.game-footer {
  padding: var(--spacing-md) var(--spacing-xl);
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid var(--color-bg-light);
}

.action-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.footer-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-bg-light);
  border: 1px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.footer-btn:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

/* ========================================
   Overlays & Modals
   ======================================== */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}

.pause-content,
.complete-content,
.gameover-content {
  background: linear-gradient(
    135deg,
    var(--color-bg-medium) 0%,
    var(--color-bg-dark) 100%
  );
  border: 2px solid var(--color-gold);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xxl);
  text-align: center;
  animation: fadeInScale 0.3s ease;
}

.pause-content h2,
.gameover-content h2 {
  font-family: var(--font-title);
  font-size: 2rem;
  color: var(--color-gold);
  margin-bottom: var(--spacing-xl);
}

.pause-content .menu-btn,
.gameover-content .menu-btn {
  margin: var(--spacing-sm) 0;
  min-width: 200px;
}

.complete-content {
  min-width: 400px;
}

.complete-stars {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  animation: starBounce 0.5s ease;
}

.complete-content h2 {
  font-family: var(--font-title);
  font-size: 2rem;
  color: var(--color-emerald);
  margin-bottom: var(--spacing-lg);
}

.complete-stats {
  margin-bottom: var(--spacing-lg);
}

.stat-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-bg-light);
  color: var(--color-text-secondary);
}

.stat-row span:last-child {
  color: var(--color-gold);
  font-weight: 600;
}

.complete-reward {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: rgba(255, 215, 0, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.reward-icon {
  font-size: 1.5rem;
  animation: float 2s ease-in-out infinite;
}

.reward-text {
  font-family: var(--font-title);
  color: var(--color-gold);
  font-size: 1.2rem;
}

.complete-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

/* ========================================
   Notification Toast
   ======================================== */
.notification {
  position: fixed;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-bg-medium);
  border: 2px solid var(--color-cyan);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-glow-cyan);
  z-index: 2000;
  opacity: 0;
  transition: all var(--transition-normal);
}

.notification.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.notification.success {
  border-color: var(--color-emerald);
  box-shadow: 0 0 20px var(--color-emerald-glow);
}

.notification.error {
  border-color: var(--color-crimson);
  box-shadow: 0 0 20px rgba(231, 76, 60, 0.3);
}

.notification-icon {
  font-size: 1.5rem;
}

.notification-text {
  color: var(--color-text-primary);
}

/* ========================================
   Animations
   ======================================== */
@keyframes titlePulse {
  0%,
  100% {
    text-shadow:
      0 0 30px var(--color-gold-glow),
      0 0 60px var(--color-gold-glow),
      0 4px 0 var(--color-gold-dark);
  }
  50% {
    text-shadow:
      0 0 50px var(--color-gold-glow),
      0 0 80px var(--color-gold-glow),
      0 4px 0 var(--color-gold-dark);
  }
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

@keyframes loadProgress {
  0% {
    width: 0%;
  }
  100% {
    width: 100%;
  }
}

@keyframes fadeInOut {
  0%,
  100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

@keyframes floatRunes {
  0% {
    transform: translateX(-100%) translateY(0) rotate(0deg);
  }
  100% {
    transform: translateX(100vw) translateY(-100vh) rotate(360deg);
  }
}

@keyframes shineText {
  0% {
    background-position: 200% center;
  }
  100% {
    background-position: -200% center;
  }
}

@keyframes gridMove {
  0% {
    transform: translateX(0) translateY(0);
  }
  100% {
    transform: translateX(50px) translateY(50px);
  }
}

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

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20%,
  60% {
    transform: translateX(-5px);
  }
  40%,
  80% {
    transform: translateX(5px);
  }
}

@keyframes correctPulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes runeGlow {
  0%,
  100% {
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.3);
    border-color: var(--color-rune-blue);
  }
  50% {
    box-shadow:
      0 0 25px rgba(52, 152, 219, 0.6),
      0 0 50px rgba(52, 152, 219, 0.3);
    border-color: #5dade2;
  }
}

@keyframes starBounce {
  0% {
    transform: scale(0);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes expandCenter {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

/* Pointer Animation */
@keyframes pointerBounce {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-5px);
  }
}

.pointer.animating {
  animation: pointerBounce 0.5s ease;
}

/* ========================================
   LPS Array Specific Styles
   ======================================== */
.lps-array-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
  padding: var(--spacing-lg);
  background: var(--color-bg-dark);
  border-radius: var(--radius-md);
}

.lps-row {
  display: flex;
  gap: 2px;
}

.lps-cell {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-light);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 0.9rem;
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.lps-cell.pointer-i {
  border-color: var(--color-cyan);
  background: rgba(0, 255, 255, 0.2);
}

.lps-cell.pointer-x {
  border-color: var(--color-gold);
  background: rgba(255, 215, 0, 0.2);
}

.lps-cell.computed {
  border-color: var(--color-emerald);
  background: rgba(46, 204, 113, 0.2);
}

.lps-cell.fallback {
  border-color: var(--color-purple);
  background: rgba(155, 89, 182, 0.2);
}

/* ========================================
   KMP Specific Styles
   ======================================== */
.kmp-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
}

.kmp-text-row,
.kmp-pattern-row {
  display: flex;
  gap: 2px;
  align-items: center;
}

.kmp-label {
  width: 80px;
  font-family: var(--font-code);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.kmp-cell {
  width: 35px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-light);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.kmp-cell.match {
  border-color: var(--color-emerald);
  background: var(--color-emerald);
  color: var(--color-bg-dark);
}

.kmp-cell.mismatch {
  border-color: var(--color-crimson);
  background: rgba(231, 76, 60, 0.2);
}

.kmp-cell.current {
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.kmp-cell.found {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-bg-dark);
  animation: pulse 0.5s ease;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1200px) {
  .side-panel {
    display: none;
  }

  .game-arena {
    flex: 1;
  }
}

@media (max-width: 768px) {
  .main-title {
    font-size: 3rem;
  }

  .main-subtitle {
    font-size: 1rem;
    letter-spacing: 0.3em;
  }

  .menu-btn {
    min-width: 250px;
    font-size: 0.9rem;
  }

  .realms-grid {
    grid-template-columns: 1fr;
  }

  .string-char {
    width: 30px;
    height: 40px;
    font-size: 1rem;
  }

  .string-index {
    width: 30px;
    font-size: 0.6rem;
  }

  .game-header {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .header-center {
    position: relative;
    left: 0;
    transform: none;
    order: 3;
    width: 100%;
    margin-top: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .main-title {
    font-size: 2rem;
  }

  .main-subtitle {
    font-size: 0.8rem;
    letter-spacing: 0.2em;
  }

  .menu-btn {
    min-width: 200px;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .game-main {
    padding: var(--spacing-sm);
  }

  .game-arena {
    padding: var(--spacing-md);
  }
}

/* ========================================
   Utility Classes
   ======================================== */
.hidden {
  display: none !important;
}

.text-gold {
  color: var(--color-gold);
}

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

.text-emerald {
  color: var(--color-emerald);
}

.text-crimson {
  color: var(--color-crimson);
}

.text-center {
  text-align: center;
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}