:root {
  color-scheme: light dark;
  --bg: #fcfcfc;
  --bg-accent: #f4f7f5;
  --text: #111827;
  --muted: #6b7280;
  --border: rgba(17, 24, 39, 0.08);
  --card: rgba(255, 255, 255, 0.86);
  --accent: #059669;
  --accent-strong: #047857;
  --draft: #b45309;
  --draft-bg: #fff7ed;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
  --font: Inter, system-ui, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", Avenir, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --bg-accent: #121a30;
    --text: #f5f7fb;
    --muted: #92a0b5;
    --border: rgba(148, 163, 184, 0.16);
    --card: rgba(20, 27, 45, 0.88);
    --accent: #34d399;
    --accent-strong: #6ee7b7;
    --draft: #fdba74;
    --draft-bg: rgba(154, 52, 18, 0.28);
    --shadow: 0 24px 60px rgba(3, 8, 20, 0.38);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background:
    radial-gradient(circle at top left, rgba(16, 185, 129, 0.08), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-accent) 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

.skip-link {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--card);
  padding: 8px 12px;
  border-radius: 999px;
}

.skip-link:focus { top: 12px; }

.site-header,
.site-footer,
main {
  width: min(780px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
}

.brand img {
  border-radius: 8px;
}

nav {
  display: flex;
  align-items: center;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow);
}

.button:hover {
  text-decoration: none;
  background: var(--accent-strong);
}

.page-header {
  padding: 28px 0 8px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}

h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin: 8px 0 12px;
}

.lede {
  font-size: 1.05rem;
  color: var(--muted);
}

.draft-banner {
  background: var(--draft-bg);
  color: var(--draft);
  border: 1px solid color-mix(in srgb, var(--draft) 30%, transparent);
  border-radius: 16px;
  padding: 12px 14px;
  font-size: 0.95rem;
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 64px;
  display: grid;
  gap: 16px;
}

.post-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 20px 22px;
  box-shadow: var(--shadow);
}

.post-card h2 {
  margin: 4px 0 8px;
  font-size: 1.25rem;
}

.meta {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0;
}

.badge {
  display: inline-flex;
  border-radius: 999px;
  padding: 2px 8px;
  background: var(--draft-bg);
  color: var(--draft);
  font-size: 12px;
  font-weight: 600;
}

.prose { padding-bottom: 56px; }

.prose h2 {
  margin-top: 2.2rem;
  font-size: 1.35rem;
}

.prose h3 {
  margin-top: 1.4rem;
  font-size: 1.05rem;
}

.prose p, .prose li { color: var(--text); }

.prose ul, .prose ol { padding-left: 1.2rem; }

.prose li + li { margin-top: 0.35rem; }

.prose blockquote {
  margin: 1.4rem 0;
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  background: var(--card);
  border-radius: 0 16px 16px 0;
  color: var(--muted);
}

.cta {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.table-wrap {
  overflow-x: auto;
  margin: 1.2rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
}

th { background: color-mix(in srgb, var(--card) 70%, var(--bg-accent)); }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 0.9rem;
}

.muted { color: var(--muted); }

@media (max-width: 640px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  nav { width: 100%; justify-content: space-between; }
}