@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
  color-scheme: light;
  --paper: oklch(0.985 0.004 95);
  --paper-strong: oklch(0.972 0.008 92);
  --stone: oklch(0.945 0.01 95);
  --stone-strong: oklch(0.915 0.014 95);
  --ink: oklch(0.26 0.02 240);
  --ink-soft: oklch(0.42 0.02 240);
  --ink-muted: oklch(0.57 0.015 240);
  --line: oklch(0.86 0.01 105);
  --line-strong: oklch(0.77 0.014 105);
  --accent: oklch(0.58 0.08 154);
  --accent-strong: oklch(0.47 0.075 154);
  --accent-soft: oklch(0.93 0.025 154);
  --accent-ink: oklch(0.32 0.04 154);
  --clay: oklch(0.69 0.11 46);
  --danger: oklch(0.61 0.16 27);
  --success: oklch(0.61 0.11 152);
  --radius-sm: 0.8rem;
  --radius-md: 1.05rem;
  --radius-lg: 1.45rem;
  --radius-xl: 1.9rem;
  --shadow-soft: 0 18px 40px color-mix(in srgb, var(--accent) 8%, rgba(23, 31, 44, 0.08));
  --shadow-panel: 0 20px 50px rgba(29, 36, 48, 0.08);
  --space-2xs: clamp(0.28rem, 0.3vw, 0.4rem);
  --space-xs: clamp(0.5rem, 0.55vw, 0.7rem);
  --space-sm: clamp(0.8rem, 0.95vw, 1rem);
  --space-md: clamp(1.05rem, 1.4vw, 1.45rem);
  --space-lg: clamp(1.5rem, 2vw, 2rem);
  --space-xl: clamp(2.2rem, 3.5vw, 3.4rem);
  --space-section: clamp(4rem, 7vw, 6.5rem);
  --body-font: 'IBM Plex Sans', sans-serif;
  --display-font: 'IBM Plex Sans', sans-serif;
  --mono-font: 'IBM Plex Mono', monospace;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--body-font);
  font-size: clamp(0.96rem, 0.92rem + 0.16vw, 1rem);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body[data-theme='brand-light'] {
  color: var(--ink);
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--accent-soft) 75%, transparent) 0%, transparent 34%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-strong) 100%);
}

body[data-theme='brand-dark'] {
  color-scheme: dark;
  --paper: oklch(0.2 0.014 240);
  --paper-strong: oklch(0.24 0.012 240);
  --stone: oklch(0.28 0.012 240);
  --stone-strong: oklch(0.34 0.014 240);
  --ink: oklch(0.95 0.006 110);
  --ink-soft: oklch(0.84 0.01 110);
  --ink-muted: oklch(0.7 0.01 110);
  --line: oklch(0.36 0.012 240);
  --line-strong: oklch(0.46 0.015 240);
  --accent-soft: oklch(0.3 0.03 154);
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--accent-soft) 78%, transparent) 0%, transparent 30%),
    linear-gradient(180deg, oklch(0.16 0.01 240) 0%, oklch(0.18 0.012 240) 100%);
}

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

img {
  display: block;
  max-width: 100%;
}

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

::selection {
  color: color-mix(in srgb, var(--paper) 95%, #fff 5%);
  background: color-mix(in srgb, var(--accent) 80%, var(--accent-soft) 20%);
}