:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --ink: #1e1c1a;
  --ink-soft: #55504a;
  --line: #e6e2dc;
  --accent: #e8622c;
  --accent-soft: #fdeee7;
  --code-bg: #f1efe9;
  --serif: Georgia, 'Iowan Old Style', 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

:root[data-theme="dark"] {
  --bg: #17140f;
  --surface: #1f1c17;
  --ink: #f2ede4;
  --ink-soft: #b8b0a4;
  --line: #34302a;
  --accent: #ff8a5c;
  --accent-soft: #2c2019;
  --code-bg: #241f19;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17140f;
    --surface: #1f1c17;
    --ink: #f2ede4;
    --ink-soft: #b8b0a4;
    --line: #34302a;
    --accent: #ff8a5c;
    --accent-soft: #2c2019;
    --code-bg: #241f19;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: 780px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
}

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.75rem;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.masthead .name {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.masthead .meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

nav.toc {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 3rem;
}

nav.toc .toc-label {
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 0.25rem;
}

nav.toc a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.9rem;
  border-bottom: 1px solid transparent;
}

nav.toc a:hover { border-bottom-color: var(--accent); color: var(--accent); }

@media (max-width: 520px) {
  nav.toc { grid-template-columns: 1fr; }
}

.doc { margin-bottom: 5rem; }
.doc:last-child { margin-bottom: 0; }

.doc-title {
  font-family: var(--serif);
  font-size: 2.1rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0 0 0.4rem;
}

.doc-sub {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0 0 2.5rem;
}

h2 {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 2.75rem 0 0.9rem;
  padding-top: 0.25rem;
  letter-spacing: -0.005em;
}

h2 .num {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 500;
  margin-right: 0.6rem;
}

h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 1.6rem 0 0.6rem;
}

p { margin: 0 0 1rem; max-width: 65ch; }

ul, ol { margin: 0 0 1.1rem; padding-left: 1.3rem; max-width: 65ch; }
li { margin-bottom: 0.45rem; }
li::marker { color: var(--accent); }

strong { font-weight: 700; }

a.inline-link {
  color: var(--accent);
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  text-underline-offset: 2px;
}

code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--code-bg);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

.callout {
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.92rem;
}

.callout strong { color: var(--accent); }

.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--line);
  border-radius: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 560px;
}

th, td {
  text-align: left;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

thead th {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  background: var(--surface);
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: color-mix(in srgb, var(--surface) 60%, transparent); }

.divider {
  border: none;
  border-top: 1px solid var(--line);
  margin: 3.5rem 0;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.contact-card .label {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.contact-card .email {
  font-family: var(--mono);
  font-size: 1.05rem;
  color: var(--accent);
  margin-top: 0.3rem;
}

footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.8rem;
}

@media (prefers-reduced-motion: no-preference) {
  a.inline-link, nav.toc a { transition: color 0.15s ease, border-color 0.15s ease; }
}