:root {
  --sand: #faf6ef; --sand-deep: #f0e8d8; --ink: #1e3240; --ink-soft: #52697a;
  --ocean: #0e7490; --ocean-deep: #155e75; --sun: #f59e0b; --shell: #ffffff;
  --radius: 18px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--sand); color: var(--ink); line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }
header.site {
  background: linear-gradient(180deg, #bfe6f0 0%, #e6f4f1 55%, var(--sand) 100%);
  padding: 26px 0 0;
}
nav { display: flex; align-items: center; justify-content: space-between; padding-bottom: 8px; }
nav .brand { font-weight: 800; font-size: 1.05rem; letter-spacing: -0.01em; color: var(--ink); text-decoration: none; }
nav .brand span { color: var(--ocean); }
nav a.link { color: var(--ink-soft); text-decoration: none; font-size: 0.95rem; margin-left: 22px; }
nav a.link:hover { color: var(--ocean-deep); }
.hero { text-align: center; padding: 64px 0 84px; }
.hero .mark { font-size: 3rem; }
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.4rem); letter-spacing: -0.03em; line-height: 1.1; margin: 10px 0 18px; }
.hero h1 em { font-style: normal; color: var(--ocean); }
.hero p { color: var(--ink-soft); font-size: 1.15rem; max-width: 560px; margin: 0 auto; }
.wave { display: block; width: 100%; height: 42px; margin-top: -42px; }
main { padding: 56px 0 72px; }
h2.section { font-size: 1.5rem; letter-spacing: -0.02em; margin-bottom: 22px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.card {
  background: var(--shell); border-radius: var(--radius); padding: 26px 24px;
  text-decoration: none; color: inherit; border: 1px solid var(--sand-deep);
  box-shadow: 0 1px 2px rgba(30, 50, 64, 0.05);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: flex; flex-direction: column; gap: 8px;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(30, 50, 64, 0.12); }
.card .icon { font-size: 2rem; }
.card h3 { font-size: 1.15rem; letter-spacing: -0.01em; }
.card p { color: var(--ink-soft); font-size: 0.95rem; }
.card .meta { margin-top: auto; padding-top: 12px; font-size: 0.8rem; color: var(--ocean-deep); font-weight: 600; }
.badge {
  display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
  text-transform: uppercase; padding: 3px 10px; border-radius: 99px;
  background: #d7f0e6; color: #0f766e; margin-left: 8px; vertical-align: 2px;
}
.badge.soon { background: #fdeccc; color: #b45309; }
.badge.beta { background: #dbeafe; color: #1d4ed8; }
article.page { background: var(--shell); border: 1px solid var(--sand-deep); border-radius: var(--radius); padding: 44px clamp(24px, 5vw, 52px); }
article.page h1 { font-size: 1.9rem; letter-spacing: -0.02em; margin-bottom: 6px; }
article.page .sub { color: var(--ink-soft); margin-bottom: 26px; }
article.page h2 { font-size: 1.2rem; margin: 30px 0 8px; }
article.page p { color: #33475a; margin-bottom: 12px; }
article.page .updated { font-size: 0.85rem; color: var(--ink-soft); margin-top: 34px; border-top: 1px solid var(--sand-deep); padding-top: 16px; }
.btnrow { display: flex; gap: 12px; flex-wrap: wrap; margin: 22px 0 6px; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 650; font-size: 0.95rem;
  padding: 11px 22px; border-radius: 12px;
}
.btn.primary { background: var(--ocean); color: #fff; }
.btn.primary:hover { background: var(--ocean-deep); }
.btn.ghost { border: 1.5px solid var(--sand-deep); color: var(--ink); background: transparent; }
.btn.ghost:hover { border-color: var(--ocean); color: var(--ocean-deep); }
.crumb { font-size: 0.9rem; margin-bottom: 18px; }
.crumb a { color: var(--ocean-deep); text-decoration: none; }
footer.site { border-top: 1px solid var(--sand-deep); padding: 34px 0 46px; color: var(--ink-soft); font-size: 0.9rem; }
footer.site .cols { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
footer.site a { color: var(--ocean-deep); text-decoration: none; }
@media (prefers-color-scheme: dark) {
  :root { --sand: #10181e; --sand-deep: #24313b; --ink: #edf3f6; --ink-soft: #9db2c0; --shell: #182229; --ocean: #38bdf8; --ocean-deep: #7dd3fc; }
  header.site { background: linear-gradient(180deg, #0c2733 0%, #0f2029 55%, var(--sand) 100%); }
  article.page p { color: #c3d2dc; }
  .badge { background: #134e4a; color: #6ee7b7; }
  .badge.soon { background: #4a3208; color: #fbbf24; }
  .badge.beta { background: #1e3a8a; color: #93c5fd; }
  .btn.primary { color: #06222e; }
}