* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: #f4f6f9;
  color: #1f2937;
}
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2563eb 0%, #1e3a8a 100%);
}
.login-box {
  background: #fff;
  padding: 40px 36px;
  border-radius: 12px;
  width: 340px;
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.login-box h1 { font-size: 20px; margin: 0 0 4px; }
.login-box .sub { color: #6b7280; font-size: 13px; margin: 0 0 20px; }
.login-box label { display: block; font-size: 13px; margin: 12px 0 4px; color: #374151; }
.login-box input {
  width: 100%; padding: 10px 12px; border: 1px solid #d1d5db; border-radius: 8px; font-size: 14px;
}
.login-box button {
  width: 100%; margin-top: 20px; padding: 11px; border: none; border-radius: 8px;
  background: #2563eb; color: #fff; font-size: 15px; cursor: pointer;
}
.login-box button:hover { background: #1d4ed8; }
.alert { background: #fef2f2; color: #b91c1c; padding: 10px 12px; border-radius: 8px; font-size: 13px; margin-bottom: 8px; }
.alert-info { background: #eff6ff; color: #1d4ed8; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px; background: #fff; border-bottom: 1px solid #e5e7eb;
}
.topbar .brand { font-weight: 600; font-size: 16px; }
.topbar .user-info { display: flex; align-items: center; gap: 16px; font-size: 14px; }
.topbar .user-info a { color: #2563eb; text-decoration: none; }
.topbar .user-info a:hover { text-decoration: underline; }

.dashboard { max-width: 960px; margin: 40px auto; padding: 0 20px; }
.dashboard h2 { font-size: 18px; color: #374151; margin-bottom: 20px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.card {
  display: block; background: #fff; border-radius: 14px; padding: 24px;
  text-decoration: none; color: inherit; box-shadow: 0 2px 8px rgba(0,0,0,.06);
  transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(0,0,0,.12); }
.card-icon { font-size: 32px; margin-bottom: 10px; }
.card-name { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.card-desc { font-size: 13px; color: #6b7280; }
.empty { color: #9ca3af; }

.admin-main { max-width: 1100px; margin: 30px auto; padding: 0 20px; }
.panel { background: #fff; border-radius: 12px; padding: 20px 24px; margin-bottom: 24px; box-shadow: 0 2px 8px rgba(0,0,0,.05); }
.panel h3 { margin-top: 0; }
.hint { color: #6b7280; font-size: 13px; }
.inline-form, .inline-form-sm { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.inline-form input, .inline-form select, .inline-form-sm input, .inline-form-sm select {
  padding: 8px 10px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 13px;
}
.inline-form button, .inline-form-sm button {
  padding: 8px 16px; border: none; border-radius: 6px; background: #2563eb; color: #fff; cursor: pointer;
}
.admin-table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 13px; }
.admin-table th, .admin-table td { text-align: left; padding: 10px; border-bottom: 1px solid #f0f0f0; vertical-align: top; }
.tag { display: inline-flex; align-items: center; gap: 4px; background: #eff6ff; color: #1d4ed8; padding: 3px 8px; border-radius: 6px; font-size: 12px; margin: 2px; }
.tag-remove { border: none; background: none; color: #1d4ed8; cursor: pointer; font-size: 13px; padding: 0; }