:root {
  /* Telegram theme variables */
  --tg-theme-bg-color: #ffffff;
  --tg-theme-text-color: #000000;
  --tg-theme-hint-color: #999999;
  --tg-theme-link-color: #2481cc;
  --tg-theme-button-color: #2481cc;
  --tg-theme-button-text-color: #ffffff;
  --tg-theme-secondary-bg-color: #f4f4f5;

  /* Custom colors */
  --bg-primary: var(--tg-theme-bg-color);
  --bg-secondary: var(--tg-theme-secondary-bg-color);
  --text-primary: var(--tg-theme-text-color);
  --text-secondary: var(--tg-theme-hint-color);
  --accent-primary: #8B5CF6;
  --accent-secondary: #EC4899;
  --accent-success: #10B981;
  --accent-warning: #F59E0B;

  /* Shadows - adapt to theme */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* Dark theme support */
@media (prefers-color-scheme: dark) {
  :root {
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  max-width: 600px;
  margin: 0 auto;
  min-height: 100vh;
  padding-bottom: 80px;
  position: relative;
}

/* Screens */
.screen {
  display: none;
  padding: var(--spacing-md);
  animation: fadeIn 0.3s ease;
  min-height: calc(100vh - 80px);
}

.screen.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Loading Screen */
#loading.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: var(--spacing-lg);
}

.loader {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(139, 92, 246, 0.2);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Onboarding */
.onboarding-content {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xl);
  min-height: calc(100vh - 80px);
  justify-content: center;
}

.hero-icon {
  font-size: 80px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

.onboarding-content h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  width: 100%;
  max-width: 300px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: 16px;
  transition: transform 0.2s ease;
}

.feature-item:active {
  transform: scale(0.98);
}

.feature-icon {
  font-size: 24px;
}

/* Header */
.header {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.user-avatar {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: white;
  box-shadow: var(--shadow-md);
}

.user-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.user-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.user-level {
  font-size: 13px;
  color: var(--text-secondary);
}

.keys-display {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

.key-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
}

.key-icon {
  font-size: 20px;
}

.key-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

/* Main Content */
.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding-bottom: var(--spacing-lg);
}

/* Cards */
.streak-card, .pity-card, .odds-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.streak-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
}

.streak-icon {
  font-size: 32px;
}

.streak-text {
  font-size: 16px;
  color: var(--text-primary);
}

.pity-card h3, .odds-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

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

.pity-bar:last-child {
  margin-bottom: 0;
}

.pity-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
  font-size: 14px;
  color: var(--text-secondary);
}

.progress-bar {
  height: 8px;
  background: var(--bg-primary);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 999px;
  transition: width 0.3s ease;
  width: 0%;
}

/* Odds */
.odds-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.odds-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border-left: 3px solid;
}

.odds-item.common {
  border-color: #9CA3AF;
}

.odds-item.rare {
  border-color: #3B82F6;
}

.odds-item.legendary {
  border-color: #F59E0B;
}

.odds-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.odds-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

/* Buttons */
.btn {
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  box-shadow: var(--shadow-md);
  color: white;
}

.btn:active {
  transform: scale(0.97);
}

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

.btn-large {
  padding: var(--spacing-lg);
  font-size: 17px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
}

.btn-secondary {
  background: linear-gradient(135deg, #3B82F6, #2563EB);
}

.btn-accent {
  background: linear-gradient(135deg, #F59E0B, #D97706);
}

.btn-icon {
  font-size: 24px;
}

.btn-text {
  flex: 1;
}

.action-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Navigation */
.nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: var(--spacing-sm) 0;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  z-index: 100;
  max-width: 600px;
  margin: 0 auto;
}

.nav-item {
  background: none;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--spacing-sm);
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.nav-item:active {
  transform: scale(0.95);
}

.nav-item.active {
  color: var(--accent-primary);
}

.nav-icon {
  font-size: 24px;
}

.nav-label {
  font-size: 11px;
  font-weight: 500;
}

/* Opening Animation */
.opening-animation {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: var(--spacing-xl);
}

.gift-box {
  font-size: 120px;
  animation: pulse 1s ease-in-out infinite;
}

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

.opening-text {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Result Screen */
.result-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl) var(--spacing-md);
  min-height: calc(100vh - 80px);
  justify-content: center;
}

.result-badge {
  position: relative;
  animation: celebrate 0.5s ease-out;
}

@keyframes celebrate {
  0% { transform: scale(0) rotate(-180deg); }
  50% { transform: scale(1.2) rotate(10deg); }
  100% { transform: scale(1) rotate(0deg); }
}

.prize-icon-large {
  font-size: 100px;
}

.result-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
}

.prize-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  width: 100%;
  box-shadow: var(--shadow-lg);
}

.prize-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.prize-rarity {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-xs);
}

.prize-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-secondary);
}

.result-actions {
  display: flex;
  gap: var(--spacing-md);
  width: 100%;
}

.result-actions .btn {
  flex: 1;
}

/* Collection */
.page-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.page-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.total-value, .subtitle {
  font-size: 14px;
  color: var(--text-secondary);
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--spacing-md);
}

.collection-item {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease;
}

.collection-item:active {
  transform: scale(0.97);
}

/* Referral */
.referral-link-box {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

#referral-link {
  flex: 1;
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
}

.referral-count {
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

/* Leaderboard */
#leaderboard-list {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.leaderboard-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
}

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

/* Responsive tweaks */
@media (max-width: 360px) {
  .keys-display {
    grid-template-columns: 1fr;
  }

  .key-item {
    flex-direction: row;
    justify-content: space-between;
  }
}