/* HoldOn legal — aligned with www brand */
:root {
  --bg: #eef3f8;
  --paper: #ffffff;
  --ink: #0b1220;
  --muted: #5b6b7c;
  --line: rgb(15 23 42 / 10%);
  --accent: #0d9488;
  --accent-deep: #0f766e;
  --accent-soft: rgb(13 148 136 / 12%);
  --font-display: 'Sora', 'Noto Sans SC', system-ui, sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 12% -10%, rgb(8 145 178 / 14%), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgb(13 148 136 / 12%), transparent 50%),
    linear-gradient(180deg, #f7fafc 0%, var(--bg) 40%, #f4f7fb 100%);
  font-family: var(--font-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-deep);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent);
}

.wrap {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 0.92rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand__mark {
  width: 0.55em;
  height: 0.55em;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), #0891b2);
  transform: translateY(-0.08em);
}

.topnav-links {
  display: flex;
  gap: 1rem;
}

.topnav-links a[aria-current='page'] {
  font-weight: 600;
  color: var(--accent-deep);
}

.card {
  background: rgb(255 255 255 / 88%);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgb(15 23 42 / 8%);
  padding: clamp(1.25rem, 3vw, 2.25rem);
}

h1 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: -0.03em;
}

.meta {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.toc {
  margin: 0 0 2rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  background: var(--accent-soft);
  border: 1px solid rgb(13 148 136 / 22%);
  font-size: 0.92rem;
}

.toc strong {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-display);
}

.toc ol {
  margin: 0;
  padding-left: 1.2rem;
}

.toc li {
  margin: 0.2rem 0;
}

h2 {
  margin: 2rem 0 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  scroll-margin-top: 1rem;
}

h2:first-of-type {
  border-top: 0;
  padding-top: 0;
}

h3 {
  margin: 1.1rem 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
}

p,
li {
  color: var(--ink);
}

ul,
ol {
  padding-left: 1.25rem;
}

li {
  margin: 0.35rem 0;
}

code {
  font-size: 0.9em;
  padding: 0.05em 0.35em;
  border-radius: 4px;
  background: rgb(15 23 42 / 5%);
}

.note {
  margin: 1rem 0;
  padding: 0.9rem 1rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 10px 10px 0;
  font-size: 0.92rem;
  color: #243044;
}

.footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 0.5rem;
}

@media (max-width: 560px) {
  .wrap {
    width: calc(100% - 1.25rem);
    padding-top: 1.25rem;
  }

  .card {
    border-radius: 14px;
  }
}