:root {
  --bg: #0f1419;
  --panel: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --accent-dim: #2a5fa8;
  --danger: #e85d5d;
  --ok: #3ecf8e;
}

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

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

.sidebar {
  width: 220px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 1rem 0;
}
.brand {
  font-weight: 700;
  padding: 0 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--accent);
}
.sidebar nav { padding: 0.75rem 0; flex: 1; }
.sidebar nav a {
  display: block;
  padding: 0.55rem 1.25rem;
  color: var(--muted);
  text-decoration: none;
}
.sidebar nav a:hover { color: var(--text); background: rgba(61,139,253,0.08); }
.sidebar-foot {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}
.who { display: block; color: var(--text); }
.role-tag {
  display: inline-block;
  margin-top: 0.35rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background: var(--border);
  font-size: 0.75rem;
}
.logout {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--danger);
  text-decoration: none;
}

.main {
  flex: 1;
  padding: 1.5rem 2rem;
  overflow: auto;
}
h1 { font-size: 1.35rem; margin: 0 0 1rem; font-weight: 600; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  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: 8px;
  padding: 1rem 1.25rem;
}
.stat .num { font-size: 1.75rem; font-weight: 700; color: var(--accent); }
.stat .lbl { font-size: 0.85rem; color: var(--muted); margin-top: 0.25rem; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
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: 500; }
table.data tr:hover td { background: rgba(255,255,255,0.02); }

.form-row { margin-bottom: 1rem; }
.form-row label { display: block; margin-bottom: 0.35rem; color: var(--muted); font-size: 0.9rem; }
.form-row input, .form-row select {
  width: 100%;
  max-width: 320px;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: none;
}
.btn:hover { background: var(--accent-dim); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-danger { background: var(--danger); }

.flash {
  padding: 0.65rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}
.flash.ok { background: rgba(62,207,142,0.15); border: 1px solid var(--ok); color: var(--ok); }
.flash.err { background: rgba(232,93,93,0.12); border: 1px solid var(--danger); color: var(--danger); }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-box {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
}
.login-box h1 { text-align: center; margin-bottom: 1.5rem; }
.login-box .form-row input, .login-box .form-row select { max-width: none; }

.mono { font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; }
.badge { font-size: 0.75rem; padding: 0.15rem 0.45rem; border-radius: 4px; background: var(--border); }
.badge-unused { color: var(--ok); }
.badge-used { color: var(--muted); }

.inline-form { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: flex-end; margin-bottom: 1rem; }
.inline-form .form-row { margin: 0; }
.inline-form .form-row input, .inline-form .form-row select { max-width: 200px; }

.codes-output {
  max-height: 240px;
  overflow: auto;
  background: var(--bg);
  padding: 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin-top: 0.75rem;
}

.pagination-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  background: var(--bg);
}
.pagination-meta { color: var(--muted); }
.pagination-links { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
.pagination-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  text-decoration: none;
}

.users-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.users-toolbar-hint {
  flex: 1 1 200px;
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0;
}
.badge-ok { color: var(--ok); background: rgba(46, 160, 67, 0.15); }
.badge-paused { color: #f0a030; background: rgba(240, 160, 48, 0.15); }
.table-actions { white-space: nowrap; }
.table-actions form { margin-right: 0.35rem; }

.renew-dialog {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  max-width: 420px;
  background: var(--card);
  color: inherit;
}
.renew-dialog::backdrop {
  background: rgba(0, 0, 0, 0.55);
}
.renew-dialog-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}