/* base.css — tokens + reset for Underground, Inc. (UGI)
   Palette: asphalt/steel neutrals + a single red accent. No gradients on buttons. */

: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);

  /* Spacing (4px system) */
  --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 — deliberately tight/industrial */
  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 4px;
  --radius-full: 9999px;

  --transition-interactive: 160ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 660px;
  --content-default: 1020px;
  --content-wide: 1280px;

  --font-display: 'Archivo', 'Arial Narrow', system-ui, sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', system-ui, sans-serif;
}

/* ---------- Light (default) ---------- */
:root,
[data-theme='light'] {
  --color-bg: #f3f3f1;
  --color-surface: #ffffff;
  --color-surface-2: #ececea;
  --color-surface-offset: #e2e2df;
  --color-ink: #14171a; /* near-black steel, used for dark bands in both themes */
  --color-ink-2: #1d2226;
  --color-divider: #dcdcd8;
  --color-border: #c9c9c4;
  --color-text: #14171a;
  --color-text-muted: #565d63;
  --color-text-faint: #868d93;
  --color-text-on-ink: #eef0f1;
  --color-text-on-ink-muted: #a8b0b6;
  --color-primary: #bf121f;
  --color-primary-hover: #9c0d18;
  --color-primary-active: #7a0a13;
  --color-primary-on-ink: #ff3d47;
  --color-success: #2f6b2a;
  --color-error: #a3121c;
  --shadow-sm: 0 1px 2px rgb(16 18 20 / 0.08);
  --shadow-md: 0 6px 18px rgb(16 18 20 / 0.1);
  --shadow-lg: 0 18px 44px rgb(16 18 20 / 0.16);
  --hairline: rgb(20 23 26 / 0.1);
}

/* ---------- Dark ---------- */
[data-theme='dark'] {
  --color-bg: #0e1113;
  --color-surface: #15191c;
  --color-surface-2: #1a1f22;
  --color-surface-offset: #22282c;
  --color-ink: #090b0d;
  --color-ink-2: #14181b;
  --color-divider: #23292d;
  --color-border: #333a3f;
  --color-text: #e7e9ea;
  --color-text-muted: #9ba3a9;
  --color-text-faint: #6f777d;
  --color-text-on-ink: #eef0f1;
  --color-text-on-ink-muted: #a8b0b6;
  --color-primary: #ff4650;
  --color-primary-hover: #ff6a72;
  --color-primary-active: #e02c37;
  --color-primary-on-ink: #ff4650;
  --color-success: #6faa54;
  --color-error: #ff6a72;
  --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.4);
  --shadow-md: 0 6px 18px rgb(0 0 0 / 0.45);
  --shadow-lg: 0 18px 44px rgb(0 0 0 / 0.55);
  --hairline: rgb(255 255 255 / 0.1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0e1113;
    --color-surface: #15191c;
    --color-surface-2: #1a1f22;
    --color-surface-offset: #22282c;
    --color-ink: #090b0d;
    --color-ink-2: #14181b;
    --color-divider: #23292d;
    --color-border: #333a3f;
    --color-text: #e7e9ea;
    --color-text-muted: #9ba3a9;
    --color-text-faint: #6f777d;
    --color-primary: #ff4650;
    --color-primary-hover: #ff6a72;
    --color-primary-active: #e02c37;
    --hairline: rgb(255 255 255 / 0.1);
  }
}

/* ---------- 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: 5.5rem;
}

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);
  overflow-x: hidden;
}

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: 1.08;
}

p,
li,
figcaption {
  text-wrap: pretty;
  max-width: 68ch;
}

a {
  color: inherit;
}

::selection {
  background: var(--color-primary);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

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);
}

@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;
  }
}

.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;
}