:root {
  color-scheme: light dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: #f4f5f7;
  color: #1f2328;
  min-height: 100vh;
}

.topbar {
  background: #ffffff;
  border-bottom: 1px solid #e2e4e8;
  padding: 16px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.topbar h1 {
  margin: 0;
  font-size: 1.1rem;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  font-size: 0.9rem;
}

.topnav a {
  color: #2563eb;
  text-decoration: none;
}

.topnav a:hover {
  text-decoration: underline;
}

.topnav-user {
  color: #6b7280;
}

.page {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 60px;
}

.services {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.service-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  background: #ffffff;
  border: 1px solid #e2e4e8;
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.service-card:hover {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.service-icon {
  font-size: 1.8rem;
}

.service-name {
  font-weight: 600;
  font-size: 1rem;
}

.service-desc {
  font-size: 0.85rem;
  color: #6b7280;
}

.auth-box {
  max-width: 360px;
  background: #ffffff;
  border: 1px solid #e2e4e8;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
}

.auth-box label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
}

.auth-box input,
.auth-box select {
  padding: 8px 10px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 1rem;
}

button {
  padding: 8px 14px;
  border: none;
  border-radius: 8px;
  background: #2563eb;
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

.error {
  color: #dc2626;
  font-size: 0.9rem;
}

.success {
  color: #16a34a;
  font-size: 0.9rem;
}

.muted {
  color: #9ca3af;
  font-size: 0.85rem;
}

.user-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid #e2e4e8;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 24px;
}

.user-table th,
.user-table td {
  padding: 10px 12px;
  border-bottom: 1px solid #e2e4e8;
  text-align: left;
  font-size: 0.9rem;
}

.inline-form {
  display: flex;
  gap: 6px;
}

.inline-form input {
  padding: 6px 8px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 0.85rem;
}

@media (max-width: 480px) {
  .services {
    grid-template-columns: 1fr;
  }

  .user-table,
  .user-table thead,
  .user-table tbody,
  .user-table th,
  .user-table td,
  .user-table tr {
    display: block;
  }

  .user-table tr {
    border-bottom: 1px solid #e2e4e8;
    padding: 8px 0;
  }
}