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

:root {
  --bg: #FAFAF8;
  --bg-surface: #F0EFED;
  --bg-code: #1A1A19;
  --border: #E2E1DE;
  --border-hover: #CCCBC7;
  --text: #1A1A19;
  --text-secondary: #6B6A67;
  --text-tertiary: #9C9B97;
  --accent: #1A1A19;
  --accent-hover: #333332;
  --accent-text: #FAFAF8;
  --link: #2563EB;
  --link-hover: #1D4ED8;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-sans: 'IBM Plex Sans', system-ui, sans-serif;
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

::selection { background: rgba(37, 99, 232, 0.15); color: var(--text); }

.container { max-width: 960px; margin: 0 auto; padding: 0 32px; }
@media (max-width: 640px) { .container { padding: 0 20px; } }

/* Nav */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 20px 0;
  transition: all 0.3s ease;
}
nav.scrolled {
  padding: 14px 0;
  background: rgba(250, 250, 248, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
nav .container { display: flex; align-items: center; justify-content: space-between; }

.logo {
  font-family: var(--font-mono); font-size: 14px; font-weight: 600;
  color: var(--text); text-decoration: none; letter-spacing: -0.01em;
}

.nav-links { display: flex; align-items: center; gap: 28px; }

.nav-link {
  font-family: var(--font-sans); font-size: 13px; font-weight: 400;
  color: var(--text-secondary); text-decoration: none;
  transition: color 0.2s ease;
}
.nav-link:hover { color: var(--text); }

.nav-cta {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  color: var(--accent-text); text-decoration: none;
  padding: 8px 16px; background: var(--accent);
  border-radius: 6px; transition: background 0.2s ease;
}
.nav-cta:hover { background: var(--accent-hover); }

@media (max-width: 640px) {
  .nav-links { gap: 16px; }
  .nav-link { display: none; }
}

/* Footer */
footer { padding: 48px 0; border-top: 1px solid var(--border); }
footer .container {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
}
.footer-left {
  font-family: var(--font-sans); font-size: 13px; font-weight: 400;
  color: var(--text-tertiary);
}
.footer-links { display: flex; gap: 20px; }
.footer-link {
  font-family: var(--font-sans); font-size: 13px; font-weight: 400;
  color: var(--text-tertiary); text-decoration: none;
  transition: color 0.2s ease;
}
.footer-link:hover { color: var(--text-secondary); }

@media (max-width: 540px) {
  footer .container { flex-direction: column; text-align: center; }
}

/* Prose (legal/about pages) */
.prose {
  padding: 140px 0 100px;
  max-width: 640px;
}
.prose h1 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 600; line-height: 1.2;
  letter-spacing: -0.02em; margin-bottom: 12px;
}
.prose .last-updated {
  font-family: var(--font-mono); font-size: 12px; font-weight: 400;
  color: var(--text-tertiary); margin-bottom: 48px;
}
.prose h2 {
  font-family: var(--font-sans);
  font-size: 18px; font-weight: 600; line-height: 1.4;
  margin-top: 48px; margin-bottom: 16px;
  padding-top: 24px; border-top: 1px solid var(--border);
}
.prose h2:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.prose p {
  font-size: 15px; font-weight: 400; line-height: 1.8;
  color: var(--text-secondary); margin-bottom: 16px;
}
.prose ul, .prose ol {
  font-size: 15px; font-weight: 400; line-height: 1.8;
  color: var(--text-secondary); margin-bottom: 16px;
  padding-left: 20px;
}
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--text); font-weight: 500; }
.prose a { color: var(--link); text-decoration: none; }
.prose a:hover { text-decoration: underline; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }