:root {
  --color-primary: #1F74FF;
  --color-accent: #DC143C;
  --color-warning: #FFD700;
  --color-success: #00C853;
  --color-text: #1A1A1A;
  --color-text-muted: rgba(26, 26, 26, 0.65);
  --color-background: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-border: rgba(26, 26, 26, 0.12);
  --color-card-glow: rgba(31, 116, 255, 0.18);
}

.dark {
  --color-primary: #1F74FF;
  --color-accent: #E51E2A;
  --color-warning: #FFD700;
  --color-success: #00C853;
  --color-text: #FFFFFF;
  --color-text-muted: rgba(255, 255, 255, 0.7);
  --color-background: #000000;
  --color-surface: #1A1A1A;
  --color-border: rgba(255, 255, 255, 0.16);
  --color-card-glow: rgba(229, 30, 42, 0.18);
}

html, body {
  font-family: 'Roboto', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-background);
  color: var(--color-text);
}

.font-orbitron {
  font-family: 'Orbitron', 'Montserrat', 'Roboto', sans-serif;
}

.nav-link {
  position: relative;
  padding: 0.5rem 0.85rem;
  border-radius: 9999px;
  color: var(--color-text-muted);
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-text);
  background-color: rgba(31, 116, 255, 0.12);
  transform: translateY(-1px);
}

.nav-link.active {
  color: var(--color-text);
  background: linear-gradient(135deg, rgba(31, 116, 255, 0.18), rgba(229, 30, 42, 0.14));
}

.nav-link.active::after {
  content: '';
  position: absolute;
  inset-inline: 10%;
  bottom: -8px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0.65;
}

.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease, background 0.3s ease;
  backdrop-filter: blur(8px);
}

.dark .theme-toggle {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.theme-toggle:hover,
.theme-toggle:focus {
  transform: scale(1.05);
  filter: brightness(1.05);
}

.theme-toggle--single {
  position: relative;
  padding: 0;
  font-size: 1.15rem;
}

.theme-toggle--single::after {
  content: attr(data-theme-label);
  position: absolute;
  inset-inline: 50% auto;
  bottom: -1.75rem;
  transform: translateX(-50%);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.theme-toggle--single.is-active,
.theme-toggle.is-active {
  outline: 2px solid var(--color-primary);
}

.glass-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 18px;
  box-shadow: 0 12px 30px -12px var(--color-card-glow);
  backdrop-filter: blur(18px);
}

.dark .glass-card {
  background: var(--color-surface);
  border-color: var(--color-border);
}

.card-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

.metric-title {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.metric-value {
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-text);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: 12px;
  background: var(--color-primary);
  color: #FFFFFF;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover,
.btn-primary:focus {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px -12px rgba(31, 116, 255, 0.65);
}

.btn-accent {
  background: var(--color-accent);
  color: #FFFFFF;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(31, 116, 255, 0.12);
  color: var(--color-primary);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.dark .table th,
.dark .table td {
  border-bottom-color: var(--color-border);
}

.table th {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.table tbody tr:hover {
  background: rgba(31, 116, 255, 0.08);
}

.input,
.select,
.textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 0.7rem 1rem;
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.dark .input,
.dark .select,
.dark .textarea {
  border-color: var(--color-border);
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(31, 116, 255, 0.15);
  outline: none;
}

.table-actions {
  display: flex;
  gap: 0.5rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(26, 26, 26, 0.08);
}

.badge-accent {
  background: rgba(229, 30, 42, 0.12);
  color: var(--color-accent);
}

.badge-success {
  background: rgba(0, 200, 83, 0.12);
  color: var(--color-success);
}

.badge-warning {
  background: rgba(255, 215, 0, 0.12);
  color: var(--color-warning);
}

.modal {
  border: none;
  border-radius: 24px;
  padding: 0;
  background: transparent;
  max-width: 90vw;
}

.modal[open] {
  animation: modalFade 0.2s ease;
}

.modal::backdrop {
  background: rgba(12, 25, 44, 0.35);
  backdrop-filter: blur(6px);
}

@keyframes modalFade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal .btn-primary {
  min-width: 120px;
}

.modal .btn-primary[data-modal-close] {
  background: rgba(26, 26, 26, 0.1);
  color: var(--color-text);
}

.alert {
  padding: 0.85rem 1rem;
  border-radius: 14px;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.alert-success {
  background: rgba(0, 200, 83, 0.12);
  border-color: rgba(0, 200, 83, 0.28);
  color: var(--color-success);
}

.alert-error {
  background: rgba(229, 30, 42, 0.12);
  border-color: rgba(229, 30, 42, 0.32);
  color: var(--color-accent);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

.section-title {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.section-subtitle {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

a {
  color: var(--color-primary);
}

a:hover,
a:focus {
  text-decoration: underline;
}

@media (max-width: 640px) {
  header nav {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  header nav a {
    flex: 1 1 auto;
    text-align: center;
  }

  .table {
    font-size: 0.9rem;
  }
}