/* ============================================================
   base.css — Brand tokens, reset, typography
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ── Custom properties ── */
:root {
  --color-bg:             #0B0E11;
  --color-surface:        #141920;
  --color-surface-lt:     #1C2530;
  --color-accent:         #00D4AA;
  --color-accent-dim:     rgba(0, 212, 170, 0.12);
  --color-text-primary:   #F0F2F5;
  --color-text-secondary: #8899AA;
  --color-danger:         #FF6B6B;
  --color-warning:        #FFB84D;
  --color-border:         #1E2A38;
  --radius-card:          12px;

  --font-base: 'Inter', system-ui, -apple-system, sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  --lh-tight:  1.2;
  --lh-snug:   1.4;
  --lh-normal: 1.6;
  --lh-relaxed: 1.75;

  --nav-height: 64px;
  --container-max: 1100px;
  --container-prose: 720px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-base);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: var(--lh-normal);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: var(--lh-tight);
  color: var(--color-text-primary);
  font-weight: 700;
}

h1 { font-size: var(--text-5xl); font-weight: 800; }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
  color: var(--color-text-secondary);
  line-height: var(--lh-relaxed);
}

@media (max-width: 640px) {
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
}