:root {
  --bg: #0f1419;
  --panel: #1a2332;
  --border: #2d3a4f;
  --text: #e8eef7;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --accent-dim: #2563c7;
  --success: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --sidebar-w: 240px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 1.25rem 0;
}

.sidebar .brand {
  padding: 0 1.25rem 1.25rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

.sidebar nav a {
  display: block;
  padding: 0.65rem 1.25rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  border-left: 3px solid transparent;
}

.sidebar nav a:hover { color: var(--text); background: rgba(61, 139, 253, 0.08); }
.sidebar nav a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(61, 139, 253, 0.12);
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
  flex-wrap: wrap;
}

.topbar .ip-badge {
  font-size: 0.8rem;
  color: var(--muted);
  font-family: ui-monospace, Consolas, monospace;
}

.topbar .ip-badge strong { color: var(--warn); }

.content {
  padding: 1.5rem;
  flex: 1;
}

h1 { font-size: 1.35rem; margin: 0 0 1rem; font-weight: 600; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 0.75rem; color: var(--muted); font-weight: 600; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.15rem;
}

.stat .n { font-size: 1.6rem; font-weight: 700; color: var(--accent); }
.stat .l { font-size: 0.8rem; color: var(--muted); margin-top: 0.25rem; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

table.data th, table.data td {
  padding: 0.65rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.data th { color: var(--muted); font-weight: 600; }
table.data tr:hover td { background: rgba(255,255,255,0.02); }

.btn {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  text-decoration: none;
  font-family: inherit;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dim); }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); }
.btn-danger { background: #b91c1c; color: #fff; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

.form-row { margin-bottom: 0.85rem; }
.form-row label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.35rem; }
input, select, textarea {
  width: 100%;
  max-width: 420px;
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
}
textarea { min-height: 80px; max-width: 100%; }

.flash { padding: 0.65rem 1rem; border-radius: 8px; margin-bottom: 1rem; font-size: 0.9rem; }
.flash.ok { background: rgba(52, 211, 153, 0.15); border: 1px solid var(--success); color: var(--success); }
.flash.err { background: rgba(248, 113, 113, 0.12); border: 1px solid var(--danger); color: var(--danger); }

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.login-box {
  width: 100%;
  max-width: 400px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.login-box h1 { text-align: center; margin-bottom: 0.5rem; }
.login-box .sub { text-align: center; color: var(--muted); font-size: 0.85rem; margin-bottom: 1.5rem; }

.tag {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-size: 0.75rem;
}
.tag-public { background: rgba(251, 191, 36, 0.2); color: var(--warn); }
.tag-private { background: rgba(61, 139, 253, 0.2); color: var(--accent); }

.inline-form { display: inline; }
.inline-form button { margin-left: 0.25rem; }