:root {
  --bg: #0f1419;
  --bg-elev: #1a222c;
  --text: #e7ecf1;
  --muted: #8b9aab;
  --accent: #3d9a7a;
  --accent-2: #5eb89a;
  --border: #2a3542;
  --card: #151c24;
  --danger: #e06c75;
  --warn: #e5c07b;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(61, 154, 122, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(94, 140, 184, 0.12), transparent 50%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.65;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: min(920px, calc(100% - 2rem)); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(15, 20, 25, 0.8);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 0;
}
.brand {
  font-weight: 700; font-size: 1.15rem; color: var(--text);
  letter-spacing: 0.02em;
}
.brand:hover { text-decoration: none; color: var(--accent-2); }
nav { display: flex; gap: 1.1rem; }
nav a { color: var(--muted); font-size: 0.95rem; }
nav a.on, nav a:hover { color: var(--text); text-decoration: none; }

.hero { padding: 2.5rem 0 1.5rem; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); margin: 0 0 0.5rem; letter-spacing: -0.02em; }
.hero .count { font-size: 0.55em; color: var(--muted); font-weight: 500; margin-left: 0.4rem; }
.lead { color: var(--muted); margin: 0; max-width: 40rem; }

.post-grid { display: grid; gap: 1rem; padding-bottom: 3rem; }
.post-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem 1.35rem;
  color: inherit;
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}
.post-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  text-decoration: none;
  background: var(--bg-elev);
}
.post-card h2 { margin: 0.35rem 0; font-size: 1.25rem; }
.post-card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.post-meta { display: flex; gap: 0.75rem; align-items: center; font-size: 0.85rem; color: var(--muted); }
.post-author { margin-top: 0.85rem; font-size: 0.85rem; color: var(--muted); }

.badge {
  display: inline-block; padding: 0.1rem 0.55rem; border-radius: 999px;
  font-size: 0.75rem; background: #243043; color: var(--text);
}
.badge-success { background: rgba(61,154,122,0.25); color: #8fd6b8; }
.badge-warning { background: rgba(229,192,123,0.2); color: #e5c07b; }
.badge-neutral { background: #243043; }

.article { padding: 2rem 0 3rem; }
.article-head { margin-bottom: 2rem; }
.article-head h1 { font-size: clamp(1.7rem, 4vw, 2.3rem); margin: 0.4rem 0; }
.prose h2, .prose h3 { margin-top: 1.8rem; }
.prose pre {
  background: #0b1015; border: 1px solid var(--border);
  border-radius: 10px; padding: 1rem; overflow-x: auto;
  font-family: var(--mono); font-size: 0.88rem;
}
.prose code { font-family: var(--mono); font-size: 0.9em; }
.prose :not(pre) > code {
  background: #243043; padding: 0.1em 0.35em; border-radius: 4px;
}
.prose img { max-width: 100%; border-radius: 10px; }
.prose blockquote {
  margin: 1rem 0; padding: 0.2rem 1rem;
  border-left: 3px solid var(--accent); color: var(--muted);
}
.back { margin-top: 2.5rem; }
.muted { color: var(--muted); }
.error-box {
  background: rgba(224,108,117,0.12); border: 1px solid var(--danger);
  padding: 1rem; border-radius: 10px; color: #f0a0a8;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0 3rem; color: var(--muted); font-size: 0.9rem;
}

/* Dashboard */
.dash {
  max-width: 720px; margin: 0 auto; padding: 2rem 1rem 4rem;
}
.dash h1 { margin-top: 0; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 1.25rem 1.35rem; margin-bottom: 1rem;
}
label { display: block; font-size: 0.85rem; color: var(--muted); margin: 0.75rem 0 0.35rem; }
input, textarea, select {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 0.65rem 0.75rem; font: inherit;
}
textarea { min-height: 220px; resize: vertical; font-family: var(--mono); font-size: 0.9rem; }
.row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 140px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: #04140e; border: none;
  border-radius: 8px; padding: 0.65rem 1.1rem; font-weight: 600;
  cursor: pointer; font: inherit; margin-top: 1rem;
}
.btn:hover { background: var(--accent-2); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.msg { margin-top: 0.75rem; font-size: 0.9rem; }
.msg.ok { color: #8fd6b8; }
.msg.err { color: #f0a0a8; }
.hidden { display: none !important; }