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

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(0deg, #0d1733 0%, #223c83 100%);
  min-height: 100vh;
  padding: 20px;
}

.back-btn {
  position: fixed;
  top: 20px;
  left: 20px;
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 15px;
  border-radius: 50%;
  text-decoration: none;
  font-size: 1.5rem;
  transition: all 0.3s ease;
  z-index: 1000;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
  transform: scale(1.1);
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  overflow: visible;
  backdrop-filter: blur(10px);
}

.header {
  background: linear-gradient(135deg, #49bae4 0%, #223c83 100%);
  color: white;
  padding: 30px;
  text-align: center;
  position: relative;
}

.header h1 {
  font-size: 2.5em;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
  font-weight: bold;
  text-transform: uppercase;
  font-family: "Segoe UI", Arial, sans-serif;
}

.content {
  padding: 30px;
}

.leaderboard-container {
  background: white;
  border-radius: 12px;
  padding: 20px;
  border: 2px solid #e9ecef;
  min-height: 150px;
  max-height: none;
  overflow: visible;
}

.leaderboard-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.leaderboard-row:last-child {
  margin-bottom: 0;
}

@media (min-width: 768px) {
  .leaderboard-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
    grid-auto-rows: min-content;
  }
  
  .leaderboard-row {
    margin-bottom: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
}

.leaderboard-entry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 15px 0;
  font-size: 1.1em;
  font-weight: 600;
  background: #f8f9fa;
  padding: 15px 20px;
  border-radius: 10px;
  border: 2px solid #e9ecef;
  transition: all 0.3s ease;
}

.leaderboard-entry:hover {
  background: #e9ecef;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.leaderboard-entry.gold {
  background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
  border-color: #ffd700;
  color: #b8860b;
  font-weight: bold;
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.leaderboard-entry.silver {
  background: linear-gradient(135deg, #c0c0c0 0%, #e8e8e8 100%);
  border-color: #c0c0c0;
  color: #696969;
  font-weight: bold;
  box-shadow: 0 4px 15px rgba(192, 192, 192, 0.3);
}

.leaderboard-entry.bronze {
  background: linear-gradient(135deg, #cd7f32 0%, #e6a85c 100%);
  border-color: #cd7f32;
  color: #8b4513;
  font-weight: bold;
  box-shadow: 0 4px 15px rgba(205, 127, 50, 0.3);
}

.leaderboard-entry .rank {
  font-weight: bold;
  min-width: 40px;
  font-size: 1.2em;
  text-align: center;
}

.leaderboard-entry .name {
  flex: 1;
  margin: 0 20px;
  font-weight: 600;
}

.leaderboard-entry .time {
  font-weight: bold;
  font-family: 'Courier New', monospace;
  min-width: 100px;
  text-align: right;
  font-size: 1.1em;
}

.no-entries {
  text-align: center;
  color: #6c757d;
  font-style: italic;
  font-size: 1.1em;
  padding: 40px;
}

.loading {
  text-align: center;
  color: #49bae4;
  font-size: 1.1em;
  padding: 40px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

/* Modern Notification Toast */
.notification-toast {
  position: fixed;
  top: 24px;
  right: 24px;
  min-width: 320px;
  max-width: 400px;
  background: rgba(255, 255, 255, 0.98);
  border-radius: 16px;
  box-shadow: 
    0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04),
    0 0 0 1px rgba(0, 0, 0, 0.05);
  backdrop-filter: blur(20px);
  z-index: 99999;
  display: none;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.notification-toast.show {
  transform: translateX(0);
  opacity: 1;
}

.notification-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  color: white;
  background: linear-gradient(135deg, #10b981, #059669);
}

.notification-body {
  flex: 1;
  min-width: 0;
}

.notification-title {
  font-size: 14px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 4px;
  line-height: 1.2;
}

.notification-message {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.4;
  word-wrap: break-word;
}

.notification-close {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  color: #9ca3af;
  cursor: pointer;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  margin-top: -4px;
  margin-right: -4px;
}

.notification-close:hover {
  background: rgba(0, 0, 0, 0.05);
  color: #374151;
}

.notification-close:active {
  transform: scale(0.95);
}

/* Toast Types */
.notification-toast.success .notification-icon {
  background: linear-gradient(135deg, #10b981, #059669);
}

.notification-toast.error .notification-icon {
  background: linear-gradient(135deg, #ef4444, #dc2626);
}

.notification-toast.info .notification-icon {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.notification-toast.warning .notification-icon {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .container {
    margin: 10px;
    border-radius: 15px;
  }

  .content {
    padding: 20px;
  }

  .leaderboard-entry {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .leaderboard-entry .name {
    margin: 0;
    order: 1;
  }

  .leaderboard-entry .rank {
    order: 2;
  }

  .leaderboard-entry .time {
    order: 3;
  }

  /* Mobile notification adjustments */
  .notification-toast {
    top: 10px;
    right: 10px;
    left: 10px;
    max-width: none;
    font-size: 14px;
    padding: 12px 16px;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 2em;
  }

  .leaderboard-entry {
    padding: 12px 15px;
    font-size: 1em;
  }

  .leaderboard-entry .rank {
    font-size: 1.1em;
  }

  .leaderboard-entry .time {
    font-size: 1em;
  }
}