:root {
  --bg: #0f1419;
  --bg-elev: #171e26;
  --bg-soft: #1e2732;
  --line: #2a3542;
  --text: #e8eef4;
  --muted: #8b9aab;
  --accent: #3d9a7a;
  --accent-2: #4db8d4;
  --danger: #d4655a;
  --warn: #c9a227;
  --radius: 12px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1a2a33 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #1a2830 0%, transparent 50%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.page { max-width: 1080px; margin: 0 auto; padding: 24px 20px 48px; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-bottom: 32px; flex-wrap: wrap;
}
.brand {
  color: var(--text); text-decoration: none; font-weight: 700;
  letter-spacing: 0.02em; font-size: 1.15rem;
}
.nav { display: flex; gap: 8px; flex-wrap: wrap; }
.nav-link {
  color: var(--muted); text-decoration: none; padding: 8px 14px;
  border-radius: 999px; border: 1px solid transparent;
}
.nav-link:hover { color: var(--text); background: var(--bg-soft); }
.nav-link.active {
  color: var(--text); border-color: var(--line); background: var(--bg-elev);
}

.hero { margin-bottom: 28px; }
.hero h1 { margin: 0 0 10px; font-size: 1.85rem; font-weight: 700; }
.hero p { margin: 0; color: var(--muted); line-height: 1.6; max-width: 62ch; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px 18px 16px;
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.92rem; line-height: 1.55; }
.card .meta { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.75rem; padding: 4px 10px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted); background: var(--bg-soft);
}
.badge.ok { color: #9fdfc4; border-color: #2f5f4d; }
.badge.think { color: #9ed7e8; border-color: #2f5a68; }
.badge.off { color: #c9a8a4; border-color: #5a3a36; }

.section-title { margin: 8px 0 14px; font-size: 1.2rem; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; }

.btn {
  appearance: none; border: 1px solid var(--line); background: var(--bg-soft);
  color: var(--text); padding: 9px 14px; border-radius: 10px; cursor: pointer;
  font: inherit; text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { border-color: #3d4d5e; }
.btn.primary { background: var(--accent); border-color: #2f7a60; color: #04140f; font-weight: 600; }
.btn.danger { background: #3a2220; border-color: #6a3a36; color: #f0c4bf; }
.btn.sm { padding: 6px 10px; font-size: 0.85rem; }

.form { display: grid; gap: 12px; }
.form-row { display: grid; gap: 6px; }
.form-row label { font-size: 0.85rem; color: var(--muted); }
.form-row input, .form-row textarea, .form-row select {
  width: 100%; background: var(--bg); border: 1px solid var(--line);
  color: var(--text); border-radius: 10px; padding: 10px 12px; font: inherit;
}
.form-row textarea { min-height: 88px; resize: vertical; }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-elev); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; background: var(--bg-soft); }
tr:last-child td { border-bottom: none; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.alert {
  padding: 12px 14px; border-radius: 10px; margin-bottom: 16px;
  border: 1px solid var(--line); background: var(--bg-soft); color: var(--text);
}
.alert.error { border-color: #6a3a36; background: #2a1816; color: #f0c4bf; }
.alert.ok { border-color: #2f5f4d; background: #14241e; color: #9fdfc4; }

.stats { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0 24px; }
.stat {
  flex: 1; min-width: 140px; background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px 16px;
}
.stat .n { font-size: 1.5rem; font-weight: 700; }
.stat .l { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }

.footer { margin-top: 40px; color: var(--muted); font-size: 0.85rem; }

.steps { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.step {
  font-size: 0.85rem; color: var(--muted); padding: 6px 12px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--bg);
}
.step.active { color: var(--text); border-color: #3d9a7a; background: #14241e; }

.nav-right { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.user-chip {
  font-size: 0.85rem; color: var(--muted); padding: 6px 10px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--bg-soft);
}
.admin-page .topbar { gap: 12px; }
.admin-page .nav { flex: 1; flex-wrap: wrap; }

.mode-switch {
  display: inline-flex; gap: 0; margin-bottom: 16px;
  border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--bg);
}
.mode-btn {
  appearance: none; border: 0; background: transparent; color: var(--muted);
  padding: 8px 14px; cursor: pointer; font: inherit; border-right: 1px solid var(--line);
}
.mode-btn:last-child { border-right: 0; }
.mode-btn.active { background: #14241e; color: var(--text); }
.mode-btn:hover { color: var(--text); }

@media (max-width: 640px) {
  .hero h1 { font-size: 1.45rem; }
  th, td { padding: 10px; }
}