/* ===========================
   CSS CUSTOM PROPERTIES (VARIABLES)
   =========================== */
:root {
  /* Primary Color Palette */
  --primary-blue: #667eea;
  --primary-purple: #764ba2;
  --primary-red: #ff6b6b;
  --secondary-red: #ee5a52;
  --bright-blue: #0075ff;
  --success-green: #48bb78;
  --warning-red: #f56565;

  /* Neutral Colors */
  --white: #ffffff;
  --light-gray: #f8f9fa;
  --medium-gray: #a0aec0;
  --dark-gray: #2c3e50;
  --darker-gray: #34495e;
  --text-primary: #333;
  --text-secondary: #2d3748;
  --text-muted: #4a5568;

  /* Background Colors */
  --bg-overlay: rgba(102, 126, 234, 0.95);
  --bg-overlay-purple: rgba(118, 75, 162, 0.95);
  --bg-light: #f8f9ff;
  --bg-card: rgba(255, 255, 255, 0.95);

  /* Shadow Colors */
  --shadow-light: rgba(0, 0, 0, 0.15);
  --shadow-medium: rgba(0, 0, 0, 0.25);
  --shadow-heavy: rgba(0, 0, 0, 0.3);
  --shadow-blue: rgba(0, 117, 255, 0.2);
  --shadow-red: rgba(255, 107, 107, 0.3);
  --shadow-purple: rgba(102, 126, 234, 0.3);

  /* Border Colors */
  --border-light: rgba(33, 150, 243, 0.2);
  --border-medium: #e0e6ff;
  --border-input: #e3e9ef;

  /* Gradients */
  --gradient-primary: linear-gradient(
    135deg,
    var(--primary-blue) 0%,
    var(--primary-purple) 100%
  );
  --gradient-red: linear-gradient(
    45deg,
    var(--primary-red),
    var(--secondary-red)
  );
  --gradient-card-dark: linear-gradient(
    145deg,
    var(--dark-gray),
    var(--darker-gray)
  );
  --gradient-card-light: linear-gradient(
    145deg,
    var(--white),
    var(--light-gray)
  );
  --gradient-success: linear-gradient(145deg, #d4edda, #c3e6cb);

  /* Spacing */
  --border-radius-small: 8px;
  --border-radius-medium: 15px;
  --border-radius-large: 20px;
  --border-radius-xl: 25px;
}

/* ===========================
   GLOBAL RESET & BASE STYLES
   =========================== */
* {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  overflow: hidden;
  background: -o-linear-gradient(
    315deg,
    var(--primary-blue) 0%,
    var(--primary-purple) 100%
  );
  background: var(--gradient-primary);
  min-height: 100vh;
}

/* ===========================
   CUSTOM SCROLLBAR STYLES
   =========================== */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  -webkit-box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1);
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  -webkit-box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #5a6fd8, #6b42a0);
  -webkit-box-shadow: 0 4px 15px var(--shadow-heavy);
  box-shadow: 0 4px 15px var(--shadow-heavy);
}

::-webkit-scrollbar-thumb:active {
  background: linear-gradient(135deg, #4d5bc9, #5d3896);
}

::-webkit-scrollbar-corner {
  background: rgba(255, 255, 255, 0.1);
}

/* ===========================
   LOADING ANIMATION
   =========================== */
.loading-dots {
  position: fixed;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 16px;
  height: 80px;
  z-index: 9999;
}

.loading-dots span {
  width: 24px;
  height: 24px;
  background-color: var(--primary-purple);
  border-radius: 50%;
  -webkit-animation: bounce 1.1s infinite ease-in-out;
  animation: bounce 1.1s infinite ease-in-out;
}

/* Loading dots animation delays */
.loading-dots span:nth-child(1) {
  -webkit-animation-delay: 0s;
  animation-delay: 0s;
}

.loading-dots span:nth-child(2) {
  -webkit-animation-delay: 0.15s;
  animation-delay: 0.15s;
}

.loading-dots span:nth-child(3) {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}

/* Bounce animation keyframes */
@-webkit-keyframes bounce {
  0%,
  80%,
  100% {
    -webkit-transform: translateY(0);
    transform: translateY(0);
    opacity: 0.5;
  }
  40% {
    -webkit-transform: translateY(-14px);
    transform: translateY(-14px);
    opacity: 1;
  }
}

@keyframes bounce {
  0%,
  80%,
  100% {
    -webkit-transform: translateY(0);
    transform: translateY(0);
    opacity: 0.5;
  }
  40% {
    -webkit-transform: translateY(-14px);
    transform: translateY(-14px);
    opacity: 1;
  }
}

/* ===========================
   MAIN MENU CONTROL BUTTONS
   =========================== */
.control-buttons {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  background: -o-linear-gradient(
    315deg,
    var(--bg-overlay) 0%,
    var(--bg-overlay-purple) 100%
  );
  background: linear-gradient(
    135deg,
    var(--bg-overlay) 0%,
    var(--bg-overlay-purple) 100%
  );
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 30px;
}

/* Base button styles for menu buttons */
.control-buttons .start-game,
.control-buttons .leaderboard-button,
.control-buttons .how-to-play,
.control-buttons .old-player {
  background: -o-linear-gradient(
    45deg,
    var(--primary-red),
    var(--secondary-red)
  );
  background: var(--gradient-red);
  color: var(--white);
  padding: 15px 35px;
  font-size: 30px;
  font-weight: 600;
  text-align: center;
  border-radius: var(--border-radius-small);
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  transition: all 0.3s ease;
  white-space: nowrap;
  border: none;
  -webkit-box-shadow: 0 8px 25px var(--shadow-red);
  box-shadow: 0 8px 25px var(--shadow-red);
  min-width: 250px;
  display: inline-block;
  font-family: "Cairo", sans-serif;
}

/* Hover effects for menu buttons */
.control-buttons .start-game:hover,
.control-buttons .leaderboard-button:hover,
.control-buttons .how-to-play:hover,
.control-buttons .old-player:hover {
  -webkit-transform: translateY(-5px);
  -ms-transform: translateY(-5px);
  transform: translateY(-5px);
  -webkit-box-shadow: 0 15px 40px rgba(255, 107, 107, 0.4);
  box-shadow: 0 15px 40px rgba(255, 107, 107, 0.4);
}

/* Active state for menu buttons */
.control-buttons .start-game:active,
.control-buttons .leaderboard-button:active,
.control-buttons .how-to-play:active,
.control-buttons .old-player:active {
  -webkit-transform: translateY(2px) scale(0.98);
  -ms-transform: translateY(2px) scale(0.98);
  transform: translateY(2px) scale(0.98);
  -webkit-box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

/* ===========================
   HOW TO PLAY SECTION
   =========================== */
.how-to-play-container {
  background: -o-linear-gradient(
    45deg,
    var(--primary-red),
    var(--secondary-red)
  );
  background: var(--gradient-red);
  color: var(--white);
  padding: 20px 40px;
  font-size: 30px;
  font-weight: 600;
  text-align: center;
  border-radius: var(--border-radius-small);
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  transition: all 0.3s ease;
  border: none;
  -webkit-box-shadow: 0 8px 25px var(--shadow-red);
  box-shadow: 0 8px 25px var(--shadow-red);
  min-width: 250px;
  display: inline-block;
}

.how-to-play-container:hover {
  -webkit-transform: translateY(-5px);
  -ms-transform: translateY(-5px);
  transform: translateY(-5px);
  -webkit-box-shadow: 0 15px 40px rgba(255, 107, 107, 0.4);
  box-shadow: 0 15px 40px rgba(255, 107, 107, 0.4);
}

.how-to-play-container:active {
  -webkit-transform: translateY(2px) scale(0.98);
  -ms-transform: translateY(2px) scale(0.98);
  transform: translateY(2px) scale(0.98);
  -webkit-box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.how-to-play-text {
  display: block;
  margin-bottom: 8px;
}

/* Language selection options */
.language-options {
  font-size: 16px;
  font-weight: 500;
  opacity: 0.9;
}

.lang-btn {
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  -webkit-transition: all 0.2s ease;
  -o-transition: all 0.2s ease;
  transition: all 0.2s ease;
}

.lang-btn[data-lang="ar"] {
  font-family: "Cairo", sans-serif;
  font-weight: bold;
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  opacity: 1;
}

.lang-divider {
  margin: 0 6px;
  opacity: 0.7;
  pointer-events: none;
}

/* ===========================
   GAME INFO CONTAINER
   =========================== */
.info-container {
  max-width: 1080px;
  margin: 20px auto 0;
  background: var(--bg-card);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: 25px;
  font-size: 20px;
  border-radius: var(--border-radius-large);
  -webkit-box-shadow: 0 10px 40px var(--shadow-light);
  box-shadow: 0 10px 40px var(--shadow-light);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: 25px;
  border: 2px solid var(--border-light);
  width: calc(100% - 40px);
}

.info-container.hidden {
  display: none !important;
}

.fade-in-up {
  -webkit-animation: fadeInUp 0.6s ease-out !important;
  animation: fadeInUp 0.6s ease-out !important;
}

.info-container > div {
  -webkit-box-flex: 1;
  -ms-flex: 1 1 auto;
  flex: 1 1 auto;
  text-align: center;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 180px;
}

.info-container > div span {
  color: #4a90e2;
  font-weight: 700;
}

/* Countdown timer styling */
.info-container .countdown {
  font-weight: bold;
  font-size: 26px;
  color: var(--primary-red);
  background: rgba(255, 107, 107, 0.1);
  padding: 12px 20px;
  border-radius: var(--border-radius-medium);
  border: 2px solid rgba(255, 107, 107, 0.2);
}

.info-container .countdown .minutes,
.info-container .countdown .seconds {
  color: var(--primary-red);
}

/* Hidden images container (likely for preloading) */
.images-container {
  display: none;
}

/* ===========================
   MEMORY GAME BLOCKS
   =========================== */
.memory-game-blocks {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  max-width: 1080px;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  margin: 30px auto;
  gap: 20px;
  padding: 0 20px;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}

.memory-game-blocks.hidden {
  display: none !important;
}

/* Disable clicking during game transitions */
.memory-game-blocks.no-clicking {
  pointer-events: none;
}

/* Individual game block styling */
.memory-game-blocks .game-block {
  height: 200px;
  width: 200px;
  -webkit-transition: -webkit-transform 0.6s ease;
  transition: -webkit-transform 0.6s ease;
  -o-transition: transform 0.6s ease;
  transition: transform 0.6s ease;
  transition: transform 0.6s ease, -webkit-transform 0.6s ease;
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
  cursor: pointer;
  position: relative;
  border-radius: var(--border-radius-large);
  border: 4px solid var(--bright-blue);
  -webkit-box-shadow: 0 8px 25px var(--shadow-blue);
  box-shadow: 0 8px 25px var(--shadow-blue);
}

.memory-game-blocks .game-block:hover {
  -webkit-transform: scale(1.08);
  -ms-transform: scale(1.08);
  transform: scale(1.08);
}

/* Front face of game block (hidden state) */
.memory-game-blocks .game-block .front {
  background: -o-linear-gradient(305deg, var(--dark-gray), var(--darker-gray));
  background: var(--gradient-card-dark);
  line-height: 200px;
  border-radius: 16px;
  -webkit-box-shadow: 0 6px 20px var(--shadow-medium);
  box-shadow: 0 6px 20px var(--shadow-medium);
}

.memory-game-blocks .game-block .front::before {
  color: #ecf0f1;
  font-size: 120px;
  font-weight: bold;
  text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.4);
}

/* Front face symbols */
.memory-game-blocks .game-block .front.exclamation::before {
  content: "!";
}

.memory-game-blocks .game-block .front.question-mark::before {
  content: "?";
}

/* Back face of game block (revealed state) */
.memory-game-blocks .game-block .back {
  background: -o-linear-gradient(305deg, var(--white), var(--light-gray));
  background: var(--gradient-card-light);
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
  border-radius: 16px;
  -webkit-box-shadow: 0 6px 20px var(--shadow-light);
  box-shadow: 0 6px 20px var(--shadow-light);
  text-align: center;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}

.memory-game-blocks .game-block .back img {
  width: 120px;
  height: 120px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -o-object-fit: contain;
  object-fit: contain;
  -webkit-filter: drop-shadow(0 3px 10px var(--shadow-light));
  filter: drop-shadow(0 3px 10px var(--shadow-light));
}

/* Common face styling */
.memory-game-blocks .game-block .face {
  position: absolute;
  width: 100%;
  height: 100%;
  text-align: center;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 16px;
}

/* Flipped block state */
.memory-game-blocks .game-block.is-flipped {
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
  pointer-events: none;
}

/* Matched block state */
.memory-game-blocks .game-block.has-match {
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
  pointer-events: none;
}

.memory-game-blocks .game-block.has-match .back {
  background: -o-linear-gradient(305deg, #d4edda, #c3e6cb);
  background: var(--gradient-success);
  -webkit-box-shadow: 0 6px 25px rgba(40, 167, 69, 0.4);
  box-shadow: 0 6px 25px rgba(40, 167, 69, 0.4);
}

/* Flipped and matched block display */
.memory-game-blocks .game-block.is-flipped .back,
.memory-game-blocks .game-block.has-match .back {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}

.memory-game-blocks .game-block.is-flipped .back img,
.memory-game-blocks .game-block.has-match .back img {
  width: 120px;
  height: 120px;
  -o-object-fit: contain;
  object-fit: contain;
}

/* ===========================
   SWEET ALERT CUSTOMIZATION
   =========================== */
.swal2-select {
  padding: 12px 20px !important;
  border: 2px solid var(--border-input) !important;
  border-radius: var(--border-radius-small) !important;
  font-size: 16px !important;
  background: var(--white) !important;
  color: var(--dark-gray) !important;
  -webkit-transition: all 0.2s ease !important;
  -o-transition: all 0.2s ease !important;
  transition: all 0.2s ease !important;
  -webkit-appearance: none !important;
  -moz-appearance: none !important;
  appearance: none !important;
  cursor: pointer !important;
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%23718096" stroke-width="2"><polyline points="6,9 12,15 18,9"></polyline></svg>') !important;
  background-repeat: no-repeat !important;
  background-position: right 16px center !important;
  background-size: 20px !important;
}

.swal2-select.opened {
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" fill="none" stroke="%23718096" stroke-width="2" viewBox="0 0 24 24"><polyline points="6 15 12 9 18 15"/></svg>') !important;
  border-radius: 8px 8px 0 0 !important;
}

.swal2-select:hover {
  border-color: var(--bright-blue) !important;
}

.swal2-select:focus {
  outline: none !important;
  border-color: var(--bright-blue) !important;
  -webkit-box-shadow: 0 0 0 3px rgba(0, 117, 255, 0.1) !important;
  box-shadow: 0 0 0 3px rgba(0, 117, 255, 0.1) !important;
}

.elegant-popup {
  border-radius: var(--border-radius-medium);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  animation-duration: 0.4s !important;
  transform: scale(1) !important;
  transition: all 0.3s ease-in-out;
}

.cairo-confirm-button {
  font-family: "Cairo", sans-serif;
}

.same-player {
  background-color: #6f42c1 !important;
  color: var(--white) !important;
}

.same-player:hover {
  background-color: #5936a6 !important;
  -webkit-transition: background-color 0.3s ease;
  -o-transition: background-color 0.3s ease;
  transition: background-color 0.3s ease;
}

/* ===========================
   LEADERBOARD STYLES
   =========================== */
.leaderboard-container {
  max-width: 900px;
  margin: 40px auto;
  background: var(--white);
  border-radius: var(--border-radius-xl);
  -webkit-box-shadow: 0 25px 80px var(--shadow-light);
  box-shadow: 0 25px 80px var(--shadow-light);
  overflow: hidden;
  width: calc(100% - 30px);
}

/* Leaderboard header section */
.leaderboard-header {
  background: -o-linear-gradient(
    315deg,
    var(--primary-blue) 0%,
    var(--primary-purple) 100%
  );
  background: var(--gradient-primary);
  color: var(--white);
  padding: 40px;
  text-align: center;
  position: relative;
}

.leaderboard-header::before {
  content: "🏆";
  font-size: 50px;
  display: block;
  margin-bottom: 15px;
}

.leaderboard-header h2 {
  font-size: 36px;
  font-weight: 700;
  margin: 0;
  text-shadow: 0 3px 15px var(--shadow-heavy);
}

.leaderboard-header p {
  font-size: 18px;
  opacity: 0.9;
  margin-top: 10px;
  font-weight: 300;
}

/* Leaderboard control buttons */
.leaderboard-controls {
  padding: 30px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border-medium);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: 20px;
}

.leaderboard-controls.hidden {
  display: none !important;
}

/* Control button base styles */
.control-btn {
  background: -o-linear-gradient(
    315deg,
    var(--primary-blue),
    var(--primary-purple)
  );
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  padding: 15px 30px;
  border-radius: 50px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  -webkit-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  transition: all 0.3s ease;
  -webkit-box-shadow: 0 6px 20px var(--shadow-purple);
  box-shadow: 0 6px 20px var(--shadow-purple);
  min-width: 120px;
  display: inline-block;
}

.control-btn:hover {
  -webkit-transform: translateY(-3px);
  -ms-transform: translateY(-3px);
  transform: translateY(-3px);
  -webkit-box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.control-btn:active {
  -webkit-transform: translateY(1px) scale(0.98);
  -ms-transform: translateY(1px) scale(0.98);
  transform: translateY(1px) scale(0.98);
  -webkit-box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* Danger button variant (red styling) */
.control-btn.danger {
  background: -o-linear-gradient(
    315deg,
    var(--primary-red),
    var(--secondary-red)
  );
  background: var(--gradient-red);
  -webkit-box-shadow: 0 6px 20px var(--shadow-red);
  box-shadow: 0 6px 20px var(--shadow-red);
}

.control-btn.danger:hover {
  -webkit-box-shadow: 0 10px 30px rgba(255, 107, 107, 0.4);
  box-shadow: 0 10px 30px rgba(255, 107, 107, 0.4);
}

.control-btn.danger:active {
  -webkit-transform: translateY(1px) scale(0.98);
  -ms-transform: translateY(1px) scale(0.98);
  transform: translateY(1px) scale(0.98);
  -webkit-box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.control-btn.danger.hidden {
  display: none !important;
}

/* Menu button variant (also red styling) */
.control-btn.menu {
  background: -o-linear-gradient(
    315deg,
    var(--primary-red),
    var(--secondary-red)
  );
  background: var(--gradient-red);
  -webkit-box-shadow: 0 6px 20px var(--shadow-red);
  box-shadow: 0 6px 20px var(--shadow-red);
}

.control-btn.menu:hover {
  -webkit-box-shadow: 0 10px 30px rgba(255, 107, 107, 0.4);
  box-shadow: 0 10px 30px rgba(255, 107, 107, 0.4);
}

.control-btn.menu:active {
  -webkit-transform: translateY(1px) scale(0.98);
  -ms-transform: translateY(1px) scale(0.98);
  transform: translateY(1px) scale(0.98);
  -webkit-box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.control-btn.menu.hidden {
  display: none !important;
}

/* Leaderboard content area */
.leaderboard-content {
  padding: 0;
  max-height: 500px;
  overflow-y: auto;
}

.leaderboard-content.hidden {
  display: none !important;
}

/* Custom scrollbar for leaderboard content */
.leaderboard-content::-webkit-scrollbar {
  width: 8px;
}

.leaderboard-content::-webkit-scrollbar-track {
  background: var(--light-gray);
}

.leaderboard-content::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: 4px;
}

/* ===========================
   LEADERBOARD TABLE STYLES
   =========================== */
.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
}

/* Table header styling */
.leaderboard-table th {
  padding: 25px 20px;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 2px solid var(--border-medium);
  background: var(--bg-light);
}

/* Table row styling */
.leaderboard-table tbody tr {
  -webkit-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  transition: all 0.3s ease;
  border-bottom: 1px solid #f0f0f0;
}

.leaderboard-table tbody tr:hover {
  background: -o-linear-gradient(315deg, var(--bg-light), #f0f4ff);
  background: linear-gradient(135deg, var(--bg-light), #f0f4ff);
  -webkit-transform: translateX(8px);
  -ms-transform: translateX(8px);
  transform: translateX(8px);
  -webkit-box-shadow: 8px 0 20px rgba(102, 126, 234, 0.15);
  box-shadow: 8px 0 20px rgba(102, 126, 234, 0.15);
}

/* Table cell styling */
.leaderboard-table td {
  padding: 20px;
  color: var(--text-secondary);
  font-size: 16px;
  vertical-align: middle;
}

/* Rank column styling */
.rank-cell {
  font-weight: 700;
  font-size: 20px;
  width: 100px;
  text-align: center;
}

/* Top 3 rank gradient colors */
.rank-1 {
  background: -o-linear-gradient(315deg, #ffd700, #ffed4e);
  background: linear-gradient(135deg, #ffd700, #ffed4e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.rank-2 {
  background: -o-linear-gradient(315deg, #c0c0c0, #e5e5e5);
  background: linear-gradient(135deg, #c0c0c0, #e5e5e5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.rank-3 {
  background: -o-linear-gradient(315deg, #cd7f32, #daa520);
  background: linear-gradient(135deg, #cd7f32, #daa520);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Medal emoji styling */
.medal {
  font-size: 28px;
  margin-right: 12px;
  display: inline-block;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Username column styling */
.username-cell {
  font-weight: 600;
  color: var(--primary-blue) !important;
  font-size: 18px;
}

/* Category tag styling */
.category-tag {
  background: -o-linear-gradient(
    315deg,
    var(--primary-blue),
    var(--primary-purple)
  );
  background: var(--gradient-primary);
  color: var(--white);
  padding: 8px 16px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  display: inline-block;
  min-width: 90px;
  -webkit-box-shadow: 0 3px 10px var(--shadow-purple);
  box-shadow: 0 3px 10px var(--shadow-purple);
}

/* Points column styling */
.points-cell {
  font-weight: 700 !important;
  color: var(--success-green) !important;
  font-size: 18px !important;
}

/* Tries column styling */
.tries-cell {
  font-weight: 600 !important;
  color: var(--warning-red) !important;
  font-size: 16px !important;
}

/* Time badge styling */
.time-badge {
  background: #f7fafc;
  color: var(--text-muted) !important;
  padding: 10px 15px;
  border-radius: var(--border-radius-large);
  font-family: "Courier New", monospace;
  font-weight: 600;
  font-size: 14px;
  border: 2px solid #e2e8f0;
}

/* ID column styling */
.id-cell {
  font-weight: 600;
  color: var(--text-secondary) !important;
  font-size: 16px;
  text-align: center;
}

/* ===========================
   EMPTY STATE STYLING
   =========================== */
.empty-state {
  text-align: center;
  padding: 0px 40px 30px;
  color: var(--medium-gray);
  position: relative;
}

.empty-state.hidden {
  display: none !important;
}

.empty-state .menu {
  background: -o-linear-gradient(
    315deg,
    var(--primary-blue),
    var(--primary-purple)
  );
  background: var(--gradient-primary);
  margin: 25px auto 0;
  display: inline-block;
  position: static;
  -webkit-transform: none;
  -ms-transform: none;
  transform: none;
  -webkit-box-shadow: 0 6px 20px var(--shadow-purple);
  box-shadow: 0 6px 20px var(--shadow-purple);
}

.empty-state .menu:hover {
  -webkit-box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.empty-state-icon {
  font-size: 100px;
  margin-bottom: 30px;
  opacity: 0.6;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.empty-state h3 {
  font-size: 28px;
  margin-bottom: 15px;
  color: var(--text-muted);
  font-weight: 600;
}

.empty-state p {
  font-size: 18px;
  line-height: 1.6;
  max-width: 450px;
  margin: 0 auto;
}

/* ===========================
   UTILITY CLASSES
   =========================== */
.hidden {
  display: none !important;
}

/* ===========================
   RESPONSIVE DESIGN - TABLET
   =========================== */
@media (max-width: 768px) {
  /* How to play container adjustments */
  .how-to-play-container {
    padding: 18px 30px;
    font-size: 22px;
    min-width: 200px;
  }

  .language-options {
    font-size: 14px;
  }

  .lang-btn {
    padding: 3px 6px;
  }

  /* Control buttons adjustments */
  .control-buttons {
    gap: 20px;
    padding: 20px;
  }

  .control-buttons .start-game,
  .control-buttons .leaderboard-button,
  .control-buttons .how-to-play,
  .control-buttons .old-player {
    padding: 18px 30px;
    font-size: 26px;
    min-width: 200px;
  }

  /* Info container adjustments */
  .info-container {
    margin: 15px;
    padding: 20px;
    font-size: 16px;
    width: calc(100% - 30px);
    gap: 15px;
  }

  .info-container > div {
    min-width: 140px;
  }

  .info-container .countdown {
    font-size: 20px;
    padding: 10px 15px;
  }

  /* Game blocks adjustments */
  .memory-game-blocks {
    margin: 20px 10px;
    gap: 12px;
    padding: 0 10px;
  }

  .memory-game-blocks .game-block {
    height: 140px;
    width: 140px;
    border-width: 3px;
  }

  .memory-game-blocks .game-block .front {
    line-height: 140px;
    border-radius: 12px;
  }

  .memory-game-blocks .game-block .front::before {
    font-size: 60px;
  }

  .memory-game-blocks .game-block .back,
  .memory-game-blocks .game-block .face {
    border-radius: 16px;
  }

  .memory-game-blocks .game-block .back img,
  .memory-game-blocks .game-block.is-flipped .back img,
  .memory-game-blocks .game-block.has-match .back img {
    width: 90px;
    height: 90px;
  }

  /* Leaderboard adjustments */
  .leaderboard-container {
    margin: 20px 15px;
    border-radius: var(--border-radius-medium);
  }

  .leaderboard-header {
    padding: 30px 25px;
  }

  .leaderboard-header::before {
    font-size: 40px;
    margin-bottom: 10px;
  }

  .leaderboard-header h2 {
    font-size: 28px;
  }

  .leaderboard-header p {
    font-size: 16px;
  }

  .leaderboard-controls {
    padding: 25px;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    gap: 15px;
  }

  .control-btn {
    width: 100%;
    max-width: 300px;
    padding: 16px;
    font-size: 15px;
  }

  .leaderboard-table th,
  .leaderboard-table td {
    padding: 15px 12px;
    font-size: 14px;
  }

  .leaderboard-table th {
    font-size: 12px;
  }

  .rank-cell {
    font-size: 18px;
    width: 70px;
  }

  .medal {
    font-size: 20px;
    margin-right: 8px;
  }

  .username-cell {
    font-size: 16px;
  }

  .category-tag {
    font-size: 12px;
    padding: 6px 12px;
    min-width: 75px;
  }

  .points-cell {
    font-size: 16px !important;
  }

  .tries-cell {
    font-size: 14px !important;
  }

  .time-badge {
    font-size: 12px;
    padding: 8px 12px;
  }

  .empty-state {
    padding: 0px 30px 25px;
  }

  .empty-state .menu {
    margin: 30px auto 0;
  }

  .empty-state-icon {
    font-size: 70px;
    margin-bottom: 20px;
  }

  .empty-state h3 {
    font-size: 22px;
    margin-bottom: 12px;
  }

  .empty-state p {
    font-size: 16px;
  }
}

/* ===========================
   RESPONSIVE DESIGN - MOBILE
   =========================== */
@media (max-width: 480px) {
  /* Control buttons for mobile */
  .control-buttons .start-game,
  .control-buttons .leaderboard-button,
  .control-buttons .how-to-play,
  .control-buttons .old-player {
    padding: 16px 25px;
    font-size: 24px;
    min-width: 180px;
  }

  /* Info container for mobile */
  .info-container {
    font-size: 14px;
    padding: 15px;
  }

  .info-container .countdown {
    font-size: 18px;
    padding: 8px 12px;
  }

  /* Game blocks for mobile */
  .memory-game-blocks .game-block {
    height: 110px;
    width: 110px;
  }

  .memory-game-blocks .game-block .front {
    line-height: 110px;
  }

  .memory-game-blocks .game-block .front::before {
    font-size: 45px;
  }

  .memory-game-blocks .game-block .back img,
  .memory-game-blocks .game-block.is-flipped .back img,
  .memory-game-blocks .game-block.has-match .back img {
    width: 70px;
    height: 70px;
  }

  /* Leaderboard for mobile */
  .leaderboard-header::before {
    font-size: 35px;
  }

  .leaderboard-header h2 {
    font-size: 24px;
  }

  .leaderboard-table th,
  .leaderboard-table td {
    padding: 12px 8px;
    font-size: 13px;
  }

  .control-btn {
    padding: 14px 20px;
    font-size: 14px;
  }

  .rank-cell {
    font-size: 16px;
    width: 60px;
  }

  .medal {
    font-size: 18px;
    margin-right: 6px;
  }

  .username-cell {
    font-size: 14px;
  }

  .category-tag {
    font-size: 11px;
    padding: 5px 10px;
  }

  .time-badge {
    font-size: 11px;
    padding: 6px 10px;
  }

  .empty-state {
    padding: 00px 20px 25px;
  }

  .empty-state .menu {
    margin: 20px auto 0;
  }
}

/* ===========================
   ANIMATIONS & KEYFRAMES
   =========================== */
@-webkit-keyframes fadeInUp {
  from {
    opacity: 0;
    -webkit-transform: translateY(30px);
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    -webkit-transform: translateY(30px);
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
  }
}