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

:root,
[data-theme='light'] {
  /* Type scale */
  --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);

  /* Spacing */
  --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;

  /* Light surfaces — cool, precise, technical neutral */
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-2: #fafbfc;
  --color-surface-offset: #eef0f3;
  --color-surface-offset-2: #e5e8ec;
  --color-divider: #dde1e6;
  --color-border: #c9ced5;

  /* Text — deep ink for high precision */
  --color-text: #0e1422;
  --color-text-muted: #4b5365;
  --color-text-faint: #8b94a3;
  --color-text-inverse: #f6f7f9;

  /* Primary accent — signal cyan, vision/inspection laser */
  --color-primary: #0066ff;
  --color-primary-hover: #0052cc;
  --color-primary-active: #003d99;
  --color-primary-highlight: #d6e6ff;

  /* Anomaly accent — heatmap red for detection cues only */
  --color-anomaly: #ff3b3b;
  --color-anomaly-soft: #ffb3b3;

  /* Category accents */
  --cat-anomaly: #0066ff;
  --cat-vision: #00b4d8;
  --cat-research: #7c3aed;
  --cat-thermal: #f97316;
  --cat-quality: #22c55e;
  --cat-tools: #14b8a6;

  /* Grid stroke for inspection visual */
  --color-grid: #c9ced5;
  --color-grid-soft: #dde1e6;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

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

  --shadow-sm: 0 1px 2px rgba(14, 20, 34, 0.06);
  --shadow-md: 0 4px 16px rgba(14, 20, 34, 0.08);
  --shadow-lg: 0 16px 40px rgba(14, 20, 34, 0.12);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 1400px;

  --font-body: 'Inter', 'Helvetica Neue', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-display: 'Inter', system-ui, sans-serif;
}

[data-theme='dark'] {
  --color-bg: #0a0d14;
  --color-surface: #11151e;
  --color-surface-2: #161b26;
  --color-surface-offset: #1a2030;
  --color-surface-offset-2: #222a3c;
  --color-divider: #1f2533;
  --color-border: #2c3445;

  --color-text: #e7ecf3;
  --color-text-muted: #8893a6;
  --color-text-faint: #545d70;
  --color-text-inverse: #0a0d14;

  --color-primary: #4d8bff;
  --color-primary-hover: #6ba2ff;
  --color-primary-active: #8db9ff;
  --color-primary-highlight: #1a2a4a;

  --color-anomaly: #ff5b5b;
  --color-anomaly-soft: #7a2a2a;

  --cat-anomaly: #4d8bff;
  --cat-vision: #22d3ee;
  --cat-research: #a78bfa;
  --cat-thermal: #fb923c;
  --cat-quality: #4ade80;
  --cat-tools: #2dd4bf;

  --color-grid: #2c3445;
  --color-grid-soft: #1f2533;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0a0d14;
    --color-surface: #11151e;
    --color-surface-2: #161b26;
    --color-surface-offset: #1a2030;
    --color-surface-offset-2: #222a3c;
    --color-divider: #1f2533;
    --color-border: #2c3445;
    --color-text: #e7ecf3;
    --color-text-muted: #8893a6;
    --color-text-faint: #545d70;
    --color-text-inverse: #0a0d14;
    --color-primary: #4d8bff;
    --color-primary-hover: #6ba2ff;
    --color-primary-active: #8db9ff;
    --color-primary-highlight: #1a2a4a;
    --color-anomaly: #ff5b5b;
    --color-anomaly-soft: #7a2a2a;
    --cat-anomaly: #4d8bff;
    --cat-vision: #22d3ee;
    --cat-research: #a78bfa;
    --cat-thermal: #fb923c;
    --cat-quality: #4ade80;
    --cat-tools: #2dd4bf;
    --color-grid: #2c3445;
    --color-grid-soft: #1f2533;
  }
}

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

html {
  -moz-text-size-adjust: none;
  -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: var(--space-16);
}

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);
}

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

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  text-wrap: balance;
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.015em;
}

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

::selection {
  background: var(--color-primary-highlight);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  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'],
input,
textarea,
select {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow 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;
}

.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: 0 0 var(--radius-md) 0;
  transform: translateY(-110%);
  z-index: 100;
  font-size: var(--text-sm);
  font-weight: 600;
}
.skip-link:focus {
  transform: translateY(0);
}