:root {
  --bg: #0f1216;
  --panel: #1a1f27;
  --panel2: #222834;
  --text: #e6e9ef;
  --muted: #97a0ad;
  --accent: #4f8cff;
  --danger: #ff5c5c;
  --border: #2c3340;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--panel2); padding: 1px 6px; border-radius: 4px; font-size: 0.9em; }
.muted { color: var(--muted); }
.small { font-size: 0.85em; }
.error { background: #3a1d1d; color: #ffb3b3; padding: 10px 14px; border-radius: 8px; }
.notice { background: #2a2f1d; color: #e6e0a8; padding: 10px 14px; border-radius: 8px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px; background: var(--panel); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.topbar nav { display: flex; align-items: center; gap: 18px; }
.topbar .who { color: var(--muted); }
.container { max-width: 1000px; margin: 0 auto; padding: 24px; }

.inline { display: inline; }
.link-btn {
  background: none; border: none; color: var(--accent); cursor: pointer;
  font: inherit; padding: 0;
}
.link-btn.danger { color: var(--danger); }

.btn {
  display: inline-block; background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); padding: 8px 16px; border-radius: 8px;
  cursor: pointer; font: inherit;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.small { padding: 5px 12px; font-size: 0.9em; }

.login-box { max-width: 360px; margin: 60px auto; background: var(--panel); padding: 28px; border-radius: 12px; }
.login-box label, .form-grid label { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
input, select {
  background: var(--panel2); border: 1px solid var(--border); color: var(--text);
  padding: 9px 11px; border-radius: 8px; font: inherit;
}
.checkbox { flex-direction: row !important; align-items: center; gap: 8px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.card h3 { margin: 0 0 6px; }
.card .note { color: var(--muted); font-size: 0.9em; margin: 0 0 10px; }
.card .viewers { font-size: 0.9em; color: var(--muted); margin: 6px 0 12px; }
.card .btn { width: 100%; text-align: center; }
.card .pwd { margin-top: 12px; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 22px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
.form-grid .full { grid-column: 1 / -1; }

table { width: 100%; border-collapse: collapse; font-size: 0.92em; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--border); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }

.user-row { border-bottom: 1px solid var(--border); padding: 14px 0; }
.user-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.tag { font-size: 0.78em; padding: 2px 8px; border-radius: 99px; background: var(--panel2); color: var(--muted); }
.tag.admin { background: #243a5e; color: #9cc2ff; }
.perm-form { margin-top: 10px; }
.perm-list { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 10px; }
.pwd-form input { padding: 4px 8px; }