:root {
  --paper: #f4f5ef;
  --paper-alt: #eaebe1;
  --ink: #1b231f;
  --ink-soft: #4b564f;
  --rule: #d3d6c8;
  --mark: #ffde59;
  --mark-ink: #1b1b16;
  --accent: #b84e1b;
  --accent-soft: #fbe6d8;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14181a;
    --paper-alt: #1c2222;
    --ink: #e7e9e2;
    --ink-soft: #a9b0a6;
    --rule: #2c332e;
    --accent: #ffa463;
    --accent-soft: #33200f;
  }
}
:root[data-theme="dark"] {
  --paper: #14181a;
  --paper-alt: #1c2222;
  --ink: #e7e9e2;
  --ink-soft: #a9b0a6;
  --rule: #2c332e;
  --accent: #ffa463;
  --accent-soft: #33200f;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, "Noto Serif KR", serif;
  line-height: 1.7;
  font-size: 16.5px;
}
a { color: var(--accent); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
h1, h2, h3 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  color: var(--ink);
  text-wrap: balance;
  letter-spacing: -0.01em;
}
.label {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
mark {
  background: var(--mark);
  color: var(--mark-ink);
  padding: 0.05em 0.25em;
  border-radius: 2px;
  box-decoration-break: clone;
}

.shell {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  max-width: 1180px;
  margin: 0 auto;
  min-height: 100vh;
}

.spine {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  padding: 2.6rem 1.6rem;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}
.mark-glyph {
  width: 34px; height: 34px;
  border-radius: 8px;
  display: block;
  flex: none;
}
.brand { display: flex; align-items: center; gap: 0.65rem; text-decoration: none; }
.brand-name { font-family: "Fraunces", serif; font-weight: 600; font-size: 1.02rem; color: var(--ink); }
.brand-sub { font-family: "IBM Plex Mono", monospace; font-size: 0.68rem; color: var(--ink-soft); }

.toc { display: flex; flex-direction: column; gap: 0.15rem; }
.toc a {
  color: var(--ink-soft);
  text-decoration: none;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  padding: 0.55rem 0.6rem;
  border-radius: 6px;
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
}
.toc a:hover, .toc a[aria-current="page"] { background: var(--paper-alt); color: var(--ink); }
.toc a .n { color: var(--rule); font-size: 0.72rem; }

.spine-foot {
  margin-top: auto;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  color: var(--ink-soft);
  line-height: 1.6;
}
.spine-foot a { color: var(--ink-soft); }

main { padding: 3.2rem clamp(1.4rem, 4vw, 3.6rem) 6rem; min-width: 0; }
section { max-width: 660px; }

.eyebrow { margin-bottom: 0.7rem; }
h1.page-title { font-size: clamp(1.9rem, 3vw, 2.5rem); margin: 0 0 1.1rem; }
h2.section-title { font-size: 1.55rem; margin: 0 0 0.3rem; }
.updated { margin: 0 0 2rem; }

p { margin: 0 0 1.15rem; color: var(--ink); }
.lede { font-size: 1.12rem; color: var(--ink-soft); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.9rem;
  margin: 1.8rem 0 2.2rem;
}
.card {
  background: var(--paper-alt);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 1rem 1.05rem;
}
.card .label { display: block; margin-bottom: 0.4rem; }
.card p { margin: 0; font-size: 0.94rem; }

h3.clause { font-size: 1.08rem; margin: 2rem 0 0.6rem; display: flex; align-items: baseline; gap: 0.5rem; }
h3.clause .num { font-family: "IBM Plex Mono", monospace; color: var(--accent); font-size: 0.85rem; font-weight: 600; }

ul.plain { margin: 0 0 1.15rem; padding-left: 1.15rem; }
ul.plain li { margin-bottom: 0.45rem; }

.note {
  background: var(--accent-soft);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 4px 10px 10px 4px;
  padding: 0.95rem 1.1rem;
  margin: 1.6rem 0;
  font-size: 0.94rem;
}
.note .label { color: var(--accent); margin-bottom: 0.3rem; }
.note p:last-child { margin-bottom: 0; }

table.dpt { width: 100%; border-collapse: collapse; margin: 1.4rem 0 1.8rem; font-size: 0.92rem; }
table.dpt th, table.dpt td { text-align: left; padding: 0.6rem 0.7rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
table.dpt th { font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500; }

.contact-block {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.6rem;
  background: var(--paper-alt);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 1.2rem 1.35rem;
  margin-top: 1.6rem;
}
.contact-block div { font-size: 0.92rem; }
.contact-block .label { display: block; margin-bottom: 0.2rem; }

@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; }
  .spine {
    position: static; height: auto; border-right: none; border-bottom: 1px solid var(--rule);
    flex-direction: row; align-items: center; flex-wrap: wrap; padding: 1.2rem 1.4rem; gap: 1rem 1.6rem;
  }
  .toc { flex-direction: row; flex-wrap: wrap; }
  .spine-foot { margin-top: 0; margin-left: auto; }
  main { padding: 2.2rem 1.3rem 4rem; }
}

code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.86em;
  background: var(--paper-alt);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}