:root {
  color-scheme: light dark;

  --brand-teal-700: #198e9f;
  --brand-teal-800: #0f7b89;
  --brand-teal-900: #0a6672;

  --brand-orange-500: #f7941d;
  --brand-orange-600: #e7820b;

  --slate-900: #4a5561;
  --slate-800: #55616f;
  --neutral-100: #f4f5f7;
  --neutral-200: #e7eaee;
  --neutral-300: #d3d9e0;
  --neutral-900: #17212b;
  --white: #ffffff;

  --success-500: #17a36b;
  --error-500: #c13838;

  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;

  --shadow-soft: 0 8px 24px rgba(16, 24, 40, 0.15);
  --shadow-card: 0 16px 40px rgba(16, 24, 40, 0.16);

  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;

  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;

  --bg-page: var(--neutral-100);
  --bg-card: var(--white);
  --bg-input: var(--white);
  --text-main: var(--neutral-900);
  --text-muted: #526172;
  --border-default: var(--neutral-300);
}

html[data-theme='dark'] {
  --bg-page: #111a22;
  --bg-card: #1a2631;
  --bg-input: #233241;
  --text-main: #f0f4f8;
  --text-muted: #b7c2cf;
  --border-default: #324253;
  --shadow-soft: 0 12px 28px rgba(0, 0, 0, 0.45);
  --shadow-card: 0 20px 44px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme='light']) {
    --bg-page: #111a22;
    --bg-card: #1a2631;
    --bg-input: #233241;
    --text-main: #f0f4f8;
    --text-muted: #b7c2cf;
    --border-default: #324253;
    --shadow-soft: 0 12px 28px rgba(0, 0, 0, 0.45);
    --shadow-card: 0 20px 44px rgba(0, 0, 0, 0.5);
  }
}

/* Global scrollbar styling */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--brand-teal-700) color-mix(in srgb, var(--bg-page) 60%, #000000);
}

/* WebKit-based browsers */
html::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

html::-webkit-scrollbar-track {
  background: color-mix(in srgb, var(--bg-page) 70%, #000000);
}

html::-webkit-scrollbar-thumb {
  background-color: var(--brand-teal-700);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

html::-webkit-scrollbar-thumb:hover {
  background-color: var(--brand-teal-800);
}

/* Global loading overlay (favicon bobbing + spin) */
#app-loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

#app-loading-overlay.is-visible {
  display: flex;
  opacity: 1;
  pointer-events: auto;
}

#app-loading-overlay .loading-icon {
  width: 56px;
  height: 56px;
  animation: app-loading-flip 1.6s ease-in-out infinite;
  transform-style: preserve-3d;
}

#app-loading-overlay .loading-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

@keyframes app-loading-flip {
  0%   { transform: translateY(0) rotateY(0deg); }
  25%  { transform: translateY(-8px) rotateY(90deg); }
  50%  { transform: translateY(-4px) rotateY(180deg); }
  75%  { transform: translateY(-8px) rotateY(270deg); }
  100% { transform: translateY(0) rotateY(360deg); }
}