/* base.css — design tokens + resets */

:root {
  /* Type scale (fluid) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 1rem + 6vw, 6.5rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 1080px;
  --content-wide: 1280px;

  /* Fonts (loaded in index.html) */
  --font-body: 'Inter', 'Helvetica Neue', system-ui, sans-serif;
  --font-display: 'Saira Condensed', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
}

/* LIGHT MODE — warm sand & asphalt */
:root,
[data-theme='light'] {
  --color-bg: #f3efe7;              /* warm sand */
  --color-surface: #ebe5d8;         /* lighter stone */
  --color-surface-2: #ffffff;       /* off-white */
  --color-surface-offset: #e2dccd;
  --color-divider: #cdc6b3;
  --color-border: #b9b09a;

  --color-ink: #1a1a1a;             /* asphalt */
  --color-text: #1f1d1a;
  --color-text-muted: #5a564d;
  --color-text-faint: #8a8676;
  --color-text-inverse: #f6f3ec;

  --color-accent: #b7421d;          /* oxidized rust / safety orange dialed down */
  --color-accent-hover: #8e3013;
  --color-accent-soft: #efd6c8;

  --color-warning: #b7421d;

  --shadow-sm: 0 1px 2px rgba(28, 25, 20, 0.08);
  --shadow-md: 0 6px 18px rgba(28, 25, 20, 0.10);
  --shadow-lg: 0 16px 40px rgba(28, 25, 20, 0.14);

  --grid-line: rgba(28, 25, 20, 0.07);
}

/* DARK MODE — asphalt & rust */
[data-theme='dark'] {
  --color-bg: #14130f;
  --color-surface: #1c1a16;
  --color-surface-2: #232019;
  --color-surface-offset: #2a2620;
  --color-divider: #2f2b24;
  --color-border: #423d33;

  --color-ink: #f3efe7;
  --color-text: #ece7d8;
  --color-text-muted: #9a9484;
  --color-text-faint: #6a6557;
  --color-text-inverse: #14130f;

  --color-accent: #e16432;
  --color-accent-hover: #f17a48;
  --color-accent-soft: #3a2218;

  --color-warning: #e16432;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.55);

  --grid-line: rgba(236, 231, 216, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #14130f;
    --color-surface: #1c1a16;
    --color-surface-2: #232019;
    --color-surface-offset: #2a2620;
    --color-divider: #2f2b24;
    --color-border: #423d33;
    --color-ink: #f3efe7;
    --color-text: #ece7d8;
    --color-text-muted: #9a9484;
    --color-text-faint: #6a6557;
    --color-text-inverse: #14130f;
    --color-accent: #e16432;
    --color-accent-hover: #f17a48;
    --color-accent-soft: #3a2218;
    --color-warning: #e16432;
    --grid-line: rgba(236, 231, 216, 0.05);
  }
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-feature-settings: 'ss01', 'cv11';
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul[role='list'] {
  list-style: none;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.08;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

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

::selection {
  background: var(--color-accent);
  color: var(--color-text-inverse);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

a, button, [role='button'] {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}