/* Base: variables, reset, typography */

:root {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
  --color-primary: #60a5fa;
  --color-primary-hover: #93c5fd;
  --color-accent: #22d3ee;
  --color-highlight: rgba(96, 165, 250, 0.2);
  --color-highlight-border: #60a5fa;
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: ui-monospace, monospace;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --header-height: 3.5rem;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-md);
  font-weight: 600;
  line-height: 1.25;
}

p {
  margin: 0 0 var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

ul, ol {
  margin: 0 0 var(--space-md);
  padding-left: 1.5rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
}

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

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