:root {
  color-scheme: dark;
  --bg: #05080d;
  --panel: rgba(10, 18, 29, 0.76);
  --panel-strong: rgba(13, 27, 43, 0.92);
  --text: #f4f8fb;
  --muted: #8fa1b5;
  --line: rgba(130, 236, 220, 0.2);
  --line-strong: rgba(130, 236, 220, 0.52);
  --accent: #5eead4;
  --accent-blue: #38bdf8;
  --danger: #f87171;
  --shadow: rgba(0, 0, 0, 0.42);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 18% 12%, rgba(56, 189, 248, 0.18), transparent 28rem),
    radial-gradient(circle at 82% 22%, rgba(94, 234, 212, 0.12), transparent 24rem),
    linear-gradient(135deg, #05080d 0%, #07111d 48%, #030609 100%);
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-blue); }

.shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid rgba(143, 161, 181, 0.22);
  border-radius: 999px;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.topbar nav { display: flex; gap: 8px; }

.card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, var(--panel-strong), var(--panel));
  box-shadow: 0 22px 60px var(--shadow);
}
.card + .card { margin-top: 16px; }
.card h1, .card h2 { margin: 0 0 8px; letter-spacing: -0.04em; }
.card h1 { font-size: 28px; }
.card h2 { font-size: 22px; }
.card p { margin: 0; color: var(--muted); line-height: 1.7; }
.card .desc { margin-top: 6px; }

.form { display: grid; gap: 14px; margin-top: 18px; }
.form .row { display: grid; gap: 6px; }
.form label { color: var(--muted); font-size: 13px; letter-spacing: 0.04em; }
.form input, .form textarea, .form select {
  height: 44px; padding: 0 14px;
  border: 1px solid rgba(143, 161, 181, 0.28);
  border-radius: 12px;
  background: rgba(8, 14, 23, 0.7);
  color: var(--text);
  font: inherit;
  font-size: 14px;
}
.form textarea { padding: 10px 14px; height: auto; min-height: 80px; }
.form input:focus, .form textarea:focus, .form select:focus {
  outline: none;
  border-color: var(--line-strong);
  box-shadow: 0 0 0 3px rgba(94, 234, 212, 0.18);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: 180ms ease;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-primary {
  border-color: rgba(94, 234, 212, 0.55);
  color: #052920;
  background: linear-gradient(135deg, #5eead4, #38bdf8);
}
.btn-primary:hover:not(:disabled) { transform: translateY(-1px); }
.btn-ghost { border-color: rgba(143, 161, 181, 0.28); color: var(--text); }
.btn-ghost:hover:not(:disabled) { border-color: var(--line-strong); color: var(--accent); }
.btn-danger { border-color: rgba(248, 113, 113, 0.5); color: var(--danger); }
.btn-row { display: flex; gap: 10px; margin-top: 8px; flex-wrap: wrap; }

.msg { margin-top: 10px; min-height: 20px; font-size: 13px; color: var(--muted); }
.msg[data-kind="error"] { color: var(--danger); }
.msg[data-kind="success"] { color: var(--accent); }

.kv { display: flex; flex-wrap: wrap; gap: 14px 28px; margin-top: 14px; }
.kv > div { display: flex; flex-direction: column; gap: 4px; }
.kv span:first-child { color: var(--muted); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.kv span:last-child { color: var(--text); font-weight: 650; font-size: 15px; }

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  font-size: 13px;
}
.table th, .table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid rgba(143, 161, 181, 0.14);
}
.table th { color: var(--muted); font-weight: 700; }
.table tbody tr:hover { background: rgba(94, 234, 212, 0.05); }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.06em;
  border: 1px solid rgba(143, 161, 181, 0.28);
  color: var(--muted);
}
.tag.ok { color: var(--accent); border-color: rgba(94, 234, 212, 0.4); }
.tag.warn { color: #fbbf24; border-color: rgba(251, 191, 36, 0.4); }
.tag.bad { color: var(--danger); border-color: rgba(248, 113, 113, 0.4); }

.code-list {
  margin-top: 14px;
  padding: 14px;
  border-radius: 14px;
  background: rgba(8, 14, 23, 0.7);
  border: 1px dashed rgba(143, 161, 181, 0.28);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  color: var(--accent);
  white-space: pre-wrap;
  word-break: break-all;
}

.muted-link { color: var(--muted); }
.muted-link:hover { color: var(--accent); }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.toolbar input, .toolbar select { height: 36px; padding: 0 10px; border: 1px solid rgba(143, 161, 181, 0.28); border-radius: 10px; background: rgba(8, 14, 23, 0.7); color: var(--text); }

@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; }
  .card { padding: 22px; border-radius: 20px; }
  .table { font-size: 12px; }
  .table th, .table td { padding: 8px 10px; }
}