/* latexapp design tokens */

:root {
  color-scheme: light dark;

  /* Three tiers, deliberately spaced apart for visible depth: --bg (page)
     < --surface (header/toolbar/chrome) < --surface-raised (cards, the
     writing surface, inputs). */
  --bg: oklch(96% 0.006 250);
  --surface: oklch(98.5% 0.004 250);
  --surface-raised: oklch(100% 0.002 250);
  --border: oklch(88% 0.008 250);
  --border-strong: oklch(78% 0.01 250);
  --text: oklch(20% 0.014 250);
  --text-secondary: oklch(45% 0.014 250);

  --accent: oklch(48% 0.15 258);
  --accent-hover: oklch(42% 0.16 258);
  --accent-tint: oklch(94% 0.03 258);
  --on-accent: oklch(98% 0.006 258);

  --danger: oklch(55% 0.17 25);
  --danger-tint: oklch(94% 0.035 25);

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SFMono-Regular', Menlo, Consolas, monospace;

  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;

  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;

  --shadow-sm: 0 1px 2px oklch(20% 0.02 250 / 0.06);
  --shadow-md: 0 4px 12px oklch(20% 0.02 250 / 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: oklch(15% 0.014 258);
    --surface: oklch(19% 0.013 258);
    --surface-raised: oklch(23% 0.012 258);
    --border: oklch(32% 0.014 258);
    --border-strong: oklch(42% 0.016 258);
    --text: oklch(92% 0.006 258);
    --text-secondary: oklch(68% 0.012 258);

    /* Lighter than the light-mode accent on purpose — a mid-lightness
       blue loses contrast against a dark background. */
    --accent: oklch(72% 0.16 258);
    --accent-hover: oklch(78% 0.15 258);
    --accent-tint: oklch(28% 0.05 258);
    --on-accent: oklch(14% 0.02 258);

    --danger: oklch(70% 0.18 25);
    --danger-tint: oklch(28% 0.06 25);

    --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.4);
    --shadow-md: 0 4px 14px oklch(0% 0 0 / 0.5);
  }
}

* {
  box-sizing: border-box;
}

/* A component's own `display` rule (e.g. `.doc-list { display: flex }`)
   has higher cascade priority than the UA stylesheet's `[hidden] {
   display: none }`, so anything toggled via the `hidden` attribute needs
   this to actually disappear. */
[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--text-sm);
  font-weight: 600;
  background: var(--accent);
  color: var(--on-accent);
  transition: background 0.15s ease;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--surface-raised);
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

input[type='email'],
input[type='password'],
input[type='text'] {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface-raised);
  color: var(--text);
  font-size: var(--text-base);
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* Brand mark: reused on auth pages and the dashboard header. Not shown on
   the editor, which stays minimal and task-focused. */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: var(--on-accent);
  font-family: Georgia, 'Times New Roman', serif;
  font-style: italic;
  font-size: 1rem;
  line-height: 1;
}

/* Shimmering placeholder rows shown while a list is loading, instead of a
   blank flash followed by content popping in. */
.skeleton {
  border-radius: var(--radius-md);
  background: linear-gradient(
    100deg,
    var(--border) 30%,
    var(--surface-raised) 50%,
    var(--border) 70%
  );
  background-size: 250% 100%;
  animation: skeleton-shimmer 1.4s ease-in-out infinite;
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}