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

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

:root {
  /* 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);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(2.75rem, 0.5rem + 6.5vw, 7rem);

  /* 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: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --transition-interactive: 220ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 1040px;
  --content-wide: 1240px;
}

/* DARK MODE — cinematic, default */
:root,
[data-theme='dark'] {
  --color-bg: #0a0d12;            /* deep nocturnal navy-charcoal */
  --color-surface: #11151c;
  --color-surface-2: #161b24;
  --color-surface-offset: #1c222d;
  --color-divider: #1f2632;
  --color-border: #2a3240;

  --color-text: #e7ecf2;
  --color-text-muted: #97a1b1;
  --color-text-faint: #5e6675;
  --color-text-inverse: #0a0d12;

  /* Warm amber/gold instrument-panel glow */
  --color-primary: #f0b35a;
  --color-primary-hover: #f5c073;
  --color-primary-active: #e09c3a;
  --color-primary-soft: rgba(240, 179, 90, 0.12);

  /* Foggy slate accent (asphalt highlight) */
  --color-accent: #6b8aa6;

  /* Atmospheric overlays */
  --color-haze: rgba(170, 195, 220, 0.06);
  --color-glow: rgba(240, 179, 90, 0.18);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 60px rgba(240, 179, 90, 0.18);
}

/* LIGHT MODE — daytime drive, warm-cool balance */
[data-theme='light'] {
  --color-bg: #f3efe7;            /* warm fog cream */
  --color-surface: #faf6ee;
  --color-surface-2: #ffffff;
  --color-surface-offset: #ece6d8;
  --color-divider: #ddd5c3;
  --color-border: #c9bfa8;

  --color-text: #1a1c20;
  --color-text-muted: #565c66;
  --color-text-faint: #8c9099;
  --color-text-inverse: #faf6ee;

  --color-primary: #b87011;       /* deeper warm amber for AA contrast on light */
  --color-primary-hover: #99580b;
  --color-primary-active: #774305;
  --color-primary-soft: rgba(184, 112, 17, 0.1);

  --color-accent: #3f5b75;

  --color-haze: rgba(60, 80, 105, 0.05);
  --color-glow: rgba(184, 112, 17, 0.14);

  --shadow-sm: 0 1px 2px rgba(40, 30, 10, 0.06);
  --shadow-md: 0 6px 18px rgba(40, 30, 10, 0.08);
  --shadow-lg: 0 18px 48px rgba(40, 30, 10, 0.14);
  --shadow-glow: 0 0 50px rgba(184, 112, 17, 0.18);
}

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;
  hanging-punctuation: first last;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body, system-ui, sans-serif);
  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: 1.1;
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 64ch;
}

::selection {
  background: var(--color-primary-soft);
  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 */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 1000;
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-4);
}