* { box-sizing: border-box; }
body {
  font-family: -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;
  margin: 0;
  color: #1a1a1a;
  background: #f7f7f8;
}
.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: #1f2937;
}
.nav a { color: #e5e7eb; text-decoration: none; }
.nav a.brand { font-weight: 700; color: #fff; }
.nav .spacer { flex: 1; }
.nav .user-info { color: #9ca3af; font-size: 0.9rem; }
.link-btn {
  background: none; border: none; color: #e5e7eb; text-decoration: underline;
  cursor: pointer; font-size: 0.9rem; padding: 0;
}
.container { max-width: 960px; margin: 0 auto; padding: 1.5rem; }
.login-page {
  display: flex; align-items: center; justify-content: center; height: 100vh;
}
.login-box {
  background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  width: 320px;
}
.login-box h1 { font-size: 1.2rem; margin-top: 0; }
form.form label, .login-box label {
  display: block; margin-bottom: 0.75rem; font-size: 0.9rem; color: #374151;
}
form.form input, form.form select, form.form textarea,
.login-box input {
  display: block; width: 100%; padding: 0.5rem; margin-top: 0.25rem;
  border: 1px solid #d1d5db; border-radius: 4px; font-size: 1rem;
}
.checkbox-inline { display: inline-flex !important; align-items: center; gap: 0.35rem; width: auto; margin-right: 1rem; }
.checkbox-inline input { width: auto; display: inline; }
button, .btn {
  background: #2563eb; color: #fff; border: none; padding: 0.5rem 1rem;
  border-radius: 4px; cursor: pointer; text-decoration: none; display: inline-block; font-size: 0.95rem;
}
button:hover, .btn:hover { background: #1d4ed8; }
.data-table { width: 100%; border-collapse: collapse; margin: 1rem 0; background: #fff; }
.data-table th, .data-table td { padding: 0.5rem 0.75rem; border-bottom: 1px solid #e5e7eb; text-align: left; }
.data-table th { background: #f3f4f6; }
.search-bar, .inline-form { display: flex; gap: 0.5rem; align-items: center; margin: 1rem 0; }
.search-bar input, .inline-form input { padding: 0.5rem; border: 1px solid #d1d5db; border-radius: 4px; }
.error { color: #dc2626; }
.tag { background: #e5e7eb; padding: 0.1rem 0.5rem; border-radius: 12px; font-size: 0.85rem; margin-right: 0.25rem; }
.card-list { list-style: none; padding: 0; }
.card-list li { background: #fff; padding: 1rem; margin-bottom: 0.75rem; border-radius: 6px; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.card-list a { font-weight: 600; color: #2563eb; text-decoration: none; }
.card-list p { margin: 0.25rem 0 0; color: #6b7280; font-size: 0.9rem; }
.hint { color: #6b7280; font-size: 0.85rem; }
details { margin: 1rem 0; }