:root {
  --bg: #f3f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --subtle: #6b7280;
  --line: #e5e7eb;
  --primary: #0a66c2;
  --ok: #047857;
  --bad: #b91c1c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #edf3ff 0%, #f8fbff 45%, #f3f6fb 100%);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background: #102a43;
  color: #fff;
}
.topbar a { color: #dbeafe; margin-left: 12px; text-decoration: none; }
.brand { font-weight: 700; }

.container { max-width: 1100px; margin: 24px auto; padding: 0 12px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.06);
}
.narrow { max-width: 620px; margin-inline: auto; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}
input, select, textarea, button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  font-size: 14px;
}
button, .btn {
  background: #f8fafc;
  cursor: pointer;
}
.btn {
  display: inline-block;
  text-decoration: none;
  color: var(--text);
  margin-right: 8px;
}
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.success { background: var(--ok); color: #fff; border-color: var(--ok); }
.btn.danger { background: var(--bad); color: #fff; border-color: var(--bad); }
.btn.small { padding: 4px 8px; font-size: 12px; margin-left: 6px; }

table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  padding: 10px 8px;
  vertical-align: top;
}

.flash-list { margin-bottom: 12px; }
.flash { padding: 8px 12px; border-radius: 8px; margin-bottom: 8px; }
.flash.error { background: #fee2e2; color: #7f1d1d; }
.flash.success { background: #dcfce7; color: #14532d; }

.hint { color: var(--subtle); font-size: 13px; }
.actions { margin-top: 10px; }
.guide-links {
  margin-top: 6px;
}
.guide-link {
  display: block;
  width: fit-content;
  margin: 6px 0;
  text-decoration: none;
  color: var(--primary);
  font-weight: 600;
}
.guide-link:hover {
  text-decoration: underline;
}
.guide-panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 10px;
}
.guide-panel {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  background: #fbfdff;
}
.guide-panel h3 {
  margin: 0 0 6px 0;
  font-size: 16px;
}
.guide-panel p {
  margin: 0 0 10px 0;
}
.status-running {
  color: #065f46;
  background: #d1fae5;
  border: 1px solid #a7f3d0;
  border-radius: 999px;
  padding: 2px 8px;
}
.status-other {
  color: #92400e;
  background: #fef3c7;
  border: 1px solid #fde68a;
  border-radius: 999px;
  padding: 2px 8px;
}
.owner-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.owner-avatar {
  width: 22px;
  height: 22px;
  border-radius: 999px;
  object-fit: cover;
  border: 1px solid #cbd5e1;
}
.join-tip {
  margin-top: 10px;
  border: 1px solid #fde68a;
  background: #fffbeb;
  border-radius: 10px;
  padding: 12px;
}
.join-tip-title {
  font-weight: 700;
  color: #92400e;
}
.join-tip-body {
  margin: 6px 0 10px 0;
  color: #78350f;
}
.login-main-btn {
  min-width: 180px;
  text-align: center;
}
.admin-login-collapse {
  margin-top: 14px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}
.admin-login-collapse summary {
  cursor: pointer;
  font-weight: 600;
}
.org-qr {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f8fbff;
  padding: 12px;
}
.org-qr img {
  max-width: 320px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  display: block;
}
.join-org-actions {
  margin-top: 12px;
}
.join-org-btn {
  display: inline-block;
  min-width: 220px;
  text-align: center;
  font-weight: 700;
  padding: 10px 14px;
}

@media (max-width: 760px) {
  .topbar { flex-direction: column; align-items: flex-start; gap: 8px; }
  table { font-size: 13px; }
}