/* ==================== DESIGN TOKENS ==================== */
:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-card: #222639;
  --bg-card-hover: #2a2f45;
  --bg-input: #181b25;
  --border-color: #2e3348;
  --border-accent: #3b82f6;

  --text-primary: #e8eaed;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-accent: #60a5fa;

  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --accent-green: #10b981;
  --accent-green-hover: #059669;
  --accent-red: #ef4444;
  --accent-red-hover: #dc2626;
  --accent-orange: #f59e0b;
  --accent-purple: #8b5cf6;
  --accent-yellow: #fbbf24;

  --gradient-hero: linear-gradient(135deg, #1e3a5f 0%, #0f1117 50%, #1a0f2e 100%);
  --gradient-card: linear-gradient(145deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.05));
  --gradient-accent: linear-gradient(135deg, #3b82f6, #8b5cf6);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);

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

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ==================== RESET & BASE ==================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text-accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent-blue);
}

/* ==================== LAYOUT ==================== */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

/* ==================== HEADER / NAV ==================== */
.app-header {
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-brand .icon {
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(59, 130, 246, 0.1);
}

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

.nav-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-user-name {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
}

/* ==================== HERO SECTION ==================== */
.hero {
  background: var(--gradient-hero);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(59, 130, 246, 0.15);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% {
    transform: translate(0, 0);
  }

  100% {
    transform: translate(2%, -2%);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* ==================== CARDS ==================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-glow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}

/* ==================== RACE CARDS ==================== */
.race-card {
  background: var(--gradient-card);
  background-color: var(--bg-card);
  cursor: pointer;
}

.race-card:hover {
  transform: translateY(-2px);
  background-color: var(--bg-card-hover);
}

.race-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.race-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0.35rem 0;
}

.race-status {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-xl);
  margin-top: 0.5rem;
}

.status-open {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.status-locked {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
}

.status-results {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
}

.status-past {
  background: rgba(107, 114, 128, 0.15);
  color: var(--text-muted);
}

/* ==================== FORMS ==================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-input {
  width: 100%;
  padding: 0.7rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-family);
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* ==================== RIDER INPUT LIST ==================== */
.rider-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.rider-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.rider-number {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.rider-item .form-input {
  flex: 1;
}

.rider-name-inputs {
  display: flex;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
}

.rider-name-inputs .form-input:first-child {
  flex: 3;
}

.rider-name-inputs .form-input:last-child {
  flex: 2;
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--gradient-accent);
  color: white;
}

.btn-primary:hover {
  opacity: 0.9;
  color: white;
}

.btn-success {
  background: var(--accent-green);
  color: white;
}

.btn-success:hover {
  background: var(--accent-green-hover);
  color: white;
}

.btn-danger {
  background: var(--accent-red);
  color: white;
}

.btn-danger:hover {
  background: var(--accent-red-hover);
  color: white;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.08);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 0.5rem;
  min-width: 36px;
  height: 36px;
}

/* ==================== TABLES ==================== */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.table th {
  background: var(--bg-secondary);
  font-weight: 600;
  text-align: left;
  padding: 0.85rem 1rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
  border-bottom: 1px solid var(--border-color);
}

.table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(46, 51, 72, 0.5);
}

.table tr:hover td {
  background: rgba(59, 130, 246, 0.04);
}

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

.rank-1 {
  color: var(--accent-yellow);
  font-weight: 700;
}

.rank-2 {
  color: #c0c0c0;
  font-weight: 700;
}

.rank-3 {
  color: #cd7f32;
  font-weight: 700;
}

/* ==================== BADGES ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-xl);
}

.badge-points {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
}

/* ==================== SECTION HEADERS ==================== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.category-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-blue);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid rgba(59, 130, 246, 0.2);
}

/* ==================== ALERTS / MESSAGES ==================== */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  border: 1px solid;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--accent-red);
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.3);
  color: var(--accent-blue);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--accent-orange);
}

/* ==================== TABS (Admin) ==================== */
.tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.tab {
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: var(--font-family);
}

.tab:hover {
  color: var(--text-secondary);
}

.tab.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* ==================== AUTH FORMS ==================== */
.auth-container {
  max-width: 420px;
  margin: 3rem auto;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
}

.auth-card h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.auth-card p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.auth-card .form-input {
  text-align: center;
  font-size: 1.1rem;
  padding: 0.85rem;
}

.auth-card .btn {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.85rem;
  font-size: 1rem;
}

.auth-switch {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==================== EMPTY STATE ==================== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.95rem;
}

/* ==================== LOADING ==================== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ==================== BACK LINK ==================== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
}

.back-link:hover {
  color: var(--text-accent);
}

/* ==================== FOOTER ==================== */
.app-footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

/* ==================== MOBILE HAMBURGER ==================== */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* ==================== UTILITIES ==================== */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.text-muted {
  color: var(--text-muted);
}

.text-accent {
  color: var(--text-accent);
}

.text-success {
  color: var(--accent-green);
}

.text-danger {
  color: var(--accent-red);
}

.mt-1 {
  margin-top: 0.5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-3 {
  margin-top: 1.5rem;
}

.mb-1 {
  margin-bottom: 0.5rem;
}

.mb-2 {
  margin-bottom: 1rem;
}

.mb-3 {
  margin-bottom: 1.5rem;
}

.gap-1 {
  gap: 0.5rem;
}

.flex {
  display: flex;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.hidden {
  display: none !important;
}

/* ==================== TOGGLE SWITCH ==================== */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  left: 2px;
  bottom: 2px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: var(--transition);
}

.toggle-switch input:checked+.toggle-slider {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--accent-green);
}

.toggle-switch input:checked+.toggle-slider::before {
  transform: translateX(18px);
  background: var(--accent-green);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 0.5rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    padding: 0.75rem 1rem;
    width: 100%;
  }

  .hero {
    padding: 2rem 1.25rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

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

  .main-content {
    padding: 1rem;
  }

  .auth-card {
    padding: 1.5rem;
  }

  .table-container {
    font-size: 0.82rem;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .rider-name-inputs {
    flex-direction: column;
    gap: 0.35rem;
  }
}