:root {
  --primary: #0a1628;
  --primary-light: #1e3a5f;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --secondary: #e4032e;
  --background: #0f172a;
  --surface: #1e293b;
  --surface-light: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --success: #10b981;
  --warning: #f59e0b;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.background-gradient {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(228, 3, 46, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 32px;
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.logo-text {
  font-size: 24px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Hero Section */
.hero-section {
  padding: 80px 0;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-muted);
  margin-bottom: 48px;
}

.hero-logo {
  display: inline-block;
  padding: 24px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.hero-logo:hover {
  transform: translateY(-8px);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
}

.hero-logo img {
  width: 200px;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

/* Main Content */
.main-content {
  padding: 60px 0 100px;
  position: relative;
  z-index: 1;
}

.seasons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.loading-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  gap: 20px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(59, 130, 246, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-state p {
  color: var(--text-muted);
  font-size: 16px;
}

/* Season Card */
.season-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
  position: relative;
}

.season-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(228, 3, 46, 0.1));
  opacity: 0;
  transition: var(--transition);
  z-index: 0;
}

.season-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

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

.season-card-header {
  position: relative;
  height: 180px;
  background: linear-gradient(135deg, var(--primary-light), var(--surface-light));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.season-card-header img {
  width: 120px;
  height: auto;
  object-fit: contain;
  transition: var(--transition);
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
}

.season-card:hover .season-card-header img {
  transform: scale(1.1);
}

.season-year {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--accent);
  color: white;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 14px;
  z-index: 2;
  box-shadow: var(--shadow-md);
}

.current-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--success);
  color: white;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 600;
  z-index: 2;
  box-shadow: var(--shadow-md);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.season-card-content {
  padding: 24px;
  position: relative;
  z-index: 1;
}

.season-card-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.champion-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #78350f;
  padding: 6px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
}

.champion-badge::before {
  content: "🏆";
  font-size: 16px;
}

.error-message {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--secondary);
}

/* Footer */
.main-footer {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
  position: relative;
  z-index: 1;
}

.main-footer p {
  color: var(--text-muted);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-logo img {
    width: 150px;
  }

  .seasons-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
  }

  .season-card-header {
    height: 140px;
  }

  .season-card-header img {
    width: 90px;
  }
}

@media (max-width: 480px) {
  .hero-section {
    padding: 40px 0;
  }

  .hero-title {
    font-size: 28px;
  }

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