/* ─── tokens ─────────────────────────────────────────────────── */
:root {
  --accent: #c8324c;
  --ink: #1a1a1a;
  --muted: #888;
  --rule: #1a1a1a;
  --page-bg: #f0eee9;
  --paper: #ffffff;
  /* type stacks */
  --font-title: "Helvetica Neue", "Helvetica", "Arial", sans-serif;
  --font-body: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #e05a72;
    --ink: #e8e4dc;
    --muted: #7a7670;
    --rule: #3a3630;
    --page-bg: #141210;
    --paper: #1e1b17;
  }
}

/* ─── reset ──────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
}
html, body {
  margin: 0;
  padding: 0;
}
a {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}
p {
  margin: 0;
}

body {
  background: var(--page-bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ─── layout ─────────────────────────────────────────────────── */
.page {
  display: flex;
  min-height: 100vh;
  max-width: 960px;
  margin: 0 auto;
  background: var(--paper);
}

.sidebar {
  width: 200px;
  flex-shrink: 0;
  padding: 48px 32px;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
}

.brand {
  font-family: var(--font-title);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin-bottom: 48px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-family: var(--font-body);
  font-size: 16px;
}
.nav a {
  color: var(--ink);
}
.nav a:hover {
  color: var(--accent);
}
.nav a.is-current {
  color: var(--accent);
  font-weight: 600;
}

/* ─── main ───────────────────────────────────────────────────── */
.content {
  flex: 1;
  padding: 56px 48px;
  max-width: 640px;
}

.title {
  font-family: var(--font-title);
  font-size: 44px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

.divider {
  border: none;
  border-top: 1px solid var(--ink);
  margin: 0 0 24px;
}

.content p + p {
  margin-top: 16px;
}

.footer-links {
  margin-top: 40px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 14px;
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-links .sep {
  color: #ccc;
}

/* ─── responsive ─────────────────────────────────────────────── */
@media (max-width: 720px) {
  .page {
    flex-direction: column;
    max-width: 100%;
  }
  .sidebar {
    width: 100%;
    padding: 28px 24px;
    border-right: none;
    border-bottom: 1px solid var(--rule);
  }
  .brand {
    margin-bottom: 20px;
    font-size: 24px;
  }
  .nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 14px 18px;
  }
  .content {
    padding: 32px 24px;
  }
  .title {
    font-size: 34px;
  }
}