:root {
  color-scheme: light;
  --paper: #f8f4ee;
  --ink: #243142;
  --muted: #627084;
  --quiet: #8792a2;
  --line: rgba(83, 103, 128, 0.16);
  --line-strong: rgba(83, 103, 128, 0.28);
  --blue: #5f84bb;
  --blue-soft: rgba(95, 132, 187, 0.12);
  --sage: #e7f0ea;
  --surface: rgba(255, 255, 255, 0.86);
  --shadow: 0 18px 56px rgba(78, 94, 117, 0.1);
  --max: 920px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 12%, rgba(209, 229, 249, 0.8), transparent 32rem),
    radial-gradient(circle at 84% 18%, rgba(244, 214, 191, 0.72), transparent 30rem),
    linear-gradient(180deg, #f7f2ea 0%, #fdfbf8 48%, #f6f8fb 100%);
  font-family: "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.page {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
  padding: 24px 0 72px;
}

.nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 34px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 850;
  letter-spacing: 0;
}

.brand::before {
  content: "";
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(95, 132, 187, 0.18);
  border-radius: 10px;
  background:
    #e8f0fb
    url("assets/bookmate-mark.png?v=mark-20260627-final")
    center / cover
    no-repeat;
  box-shadow: 0 8px 22px rgba(78, 94, 117, 0.12);
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

.nav-links a {
  transition: color 160ms ease;
}

.nav-links a:hover {
  color: var(--blue);
}

.doc {
  padding: clamp(28px, 5vw, 48px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.meta {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 850;
}

h1 {
  margin: 0 0 24px;
  color: var(--ink);
  font-size: clamp(34px, 6vw, 54px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin: 40px 0 12px;
  color: var(--ink);
  font-size: clamp(22px, 3.2vw, 28px);
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin: 28px 0 10px;
  font-size: 19px;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

strong {
  color: var(--ink);
}

ul,
ol {
  margin: 10px 0 24px;
  padding-left: 22px;
  color: var(--muted);
}

li {
  margin: 7px 0;
}

table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  margin: 16px 0 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

thead,
tbody,
tr {
  width: 100%;
}

th,
td {
  min-width: 180px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th:last-child,
td:last-child {
  border-right: 0;
}

tr:last-child td {
  border-bottom: 0;
}

th {
  color: var(--ink);
  background: var(--blue-soft);
  font-weight: 850;
}

.footer {
  margin: 34px 0 0;
  color: var(--quiet);
  font-size: 13px;
  font-weight: 750;
}

@media (max-width: 720px) {
  .page {
    width: min(100% - 30px, var(--max));
    padding: 14px 0 48px;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 24px;
  }

  .nav-links {
    justify-content: flex-start;
    gap: 12px;
    font-size: 12px;
  }

  .doc {
    border-radius: 14px;
  }

  h2 {
    margin-top: 34px;
  }

  th,
  td {
    min-width: 0;
    padding: 12px 13px;
    overflow-wrap: anywhere;
    word-break: keep-all;
  }

  table {
    display: table;
    table-layout: fixed;
    overflow-x: visible;
  }

  th:first-child,
  td:first-child {
    width: 34%;
  }
}