:root {
  --primary-color: #002868; /* ATP Dark Blue */
  --secondary-color: #0050D2; /* ATP Vibrant Blue */
  --accent-color: #00A3E0; /* ATP Light Blue */
  --text-dark: #111827;
  --text-light: #F3F4F6;
  --text-muted: #6B7280;
  --bg-color: #F9FAFB;
  --card-bg: #FFFFFF;
  --border-color: #E5E7EB;
  
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-dark);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  text-decoration: none;
  color: inherit;
}

/* NAVBAR */
.navbar {
  background-color: var(--primary-color);
  color: var(--text-light);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand span {
  color: var(--accent-color);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-color);
  transition: var(--transition);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-color);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

/* MAIN CONTENT */
main {
  flex: 1;
  width: 100%;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* HERO SECTION */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 6rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('https://images.unsplash.com/photo-1595435934249-5df7ed86e1c0?q=80&w=2000&auto=format&fit=crop') center/cover;
  opacity: 0.15;
  mix-blend-mode: overlay;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
}

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 9999px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--accent-color);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(0, 163, 224, 0.39);
}

.btn-primary:hover {
  background-color: #008cc2;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 163, 224, 0.23);
}

/* SECTION HEADERS */
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-title::after {
  content: '';
  height: 3px;
  flex: 1;
  background: linear-gradient(to right, var(--accent-color), transparent);
}

/* CARDS */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  background: var(--primary-color);
  color: white;
  padding: 1.5rem;
}

.card-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.card-body {
  padding: 1.5rem;
}

/* RANKING TABLE */
.ranking-wrapper {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

.ranking-table {
  width: 100%;
  border-collapse: collapse;
  white-space: nowrap;
}

.ranking-table th, .ranking-table td {
  padding: 1rem 1.5rem;
  text-align: left;
}

.ranking-table th {
  background-color: var(--primary-color);
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

.ranking-table tr {
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.ranking-table tbody tr:hover {
  background-color: #F3F4F6;
}

.ranking-table tbody tr:last-child {
  border-bottom: none;
}

.rank-number {
  font-weight: 800;
  color: var(--primary-color);
  font-size: 1.1rem;
}

.rank-1 .rank-number { color: #D4AF37; } /* Gold */
.rank-2 .rank-number { color: #C0C0C0; } /* Silver */
.rank-3 .rank-number { color: #CD7F32; } /* Bronze */

.player-name {
  font-weight: 600;
  color: var(--text-dark);
}

.points-cell {
  font-weight: 700;
  color: var(--primary-color);
}

/* PAGE SPECIFIC */
.page-header {
  background-color: var(--primary-color);
  padding: 4rem 2rem;
  color: white;
  text-align: center;
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
}

.content-box {
  background: white;
  padding: 3rem;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
}

/* FOOTER */
footer {
  background-color: #0f172a;
  color: var(--text-muted);
  text-align: center;
  padding: 3rem 2rem;
  margin-top: auto;
}

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

.footer-content p {
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

/* ANIMATIONS */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--primary-color);
    padding: 1rem;
    box-shadow: var(--shadow-md);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
}

/* ADMIN STYLES */
.admin-input {
  width: 100%;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: inherit;
  font-size: inherit;
}
}

/* TOURNAMENT BRACKET - base tokens (layout overridden per-page) */
.bracket-match-player.winner {
  background: var(--accent-color);
  color: white;
  font-weight: 700;
}
.bracket-match-player.winner .match-score { color: white; }
.tournament-category {
  background: white;
  color: var(--primary-color);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-weight: 800;
  font-size: 0.85rem;
}