* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f5f7;
  color: #222;
}

a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.page-header { margin-bottom: 16px; }
.page-header h1 { margin: 0 0 8px; font-size: 1.8rem; }
.page-header .header-desc { margin: 0; color: #666; font-size: 0.95rem; }
.page-header.text-center { text-align: center; }

.breadcrumb { font-size: 0.8rem; color: #666; margin-bottom: 4px; }

.section-title { margin: 24px 0 8px; font-size: 1.2rem; }

.tools-grid { display: flex; flex-wrap: wrap; gap: 16px; }
.tool-card {
  display: block;
  background: #fff;
  border-radius: 12px;
  padding: 16px 18px 18px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
  flex: 1 1 260px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.05s ease, box-shadow 0.05s ease;
}
.tool-card:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,0.08); }
.tool-category { font-size: 0.75rem; color: #6366f1; font-weight: 600; margin-bottom: 4px; }
.tool-card h2 { margin: 0 0 6px; font-size: 1.1rem; }
.tool-desc { margin: 0 0 10px; font-size: 0.9rem; color: #555; }
.tool-link { font-size: 0.85rem; color: #2563eb; }

.card {
  background: #fff;
  border-radius: 12px;
  padding: 16px 18px 18px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
  margin-top: 8px;
}
.card-title { margin: 0 0 8px; font-size: 1.2rem; }
.card-desc { margin: 0 0 12px; font-size: 0.9rem; color: #555; line-height: 1.6; }

.feedback-card h2 { margin: 0 0 8px; font-size: 1.2rem; }
.feedback-card p { margin: 0 0 12px; font-size: 0.9rem; color: #555; }

.alert { margin: 16px 0; padding: 12px 16px; border-radius: 8px; font-size: 0.9rem; }
.alert-success { background: #e6f6e9; color: #136023; border: 1px solid #a6d8b1; }
.alert-error { background: #ffecec; color: #8a1f11; border: 1px solid #f5b5b5; }
.alert-info { background: #e5f0ff; color: #123f76; border: 1px solid #b2c7f5; }

form { margin-top: 4px; }
.form-row { margin-bottom: 10px; display: flex; flex-direction: column; gap: 4px; }
.form-row.inline { flex-direction: row; gap: 12px; }
.form-row label { font-size: 0.9rem; }
.form-row input,
.form-row textarea { width: 100%; padding: 8px 10px; font-size: 0.95rem; border-radius: 6px; border: 1px solid #ccc; }
textarea { resize: vertical; min-height: 80px; }
small { display: block; font-size: 0.8rem; color: #777; margin-top: 4px; line-height: 1.5; }

.btn-primary,
.btn-secondary,
.btn { display: inline-block; padding: 8px 16px; font-size: 0.95rem; border-radius: 999px; border: none; cursor: pointer; margin-top: 4px; text-align: center; }
.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; }
.btn-secondary { background: #e5e7eb; color: #111827; }
.btn-secondary:hover { background: #d1d5db; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn.full { width: 100%; }

.grid { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 8px; }
.grid > * { flex: 1 1 280px; }

.form-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 16px; align-items: flex-start; }
.form-group { margin-bottom: 10px; }
.form-group label { display: block; font-size: 0.9rem; margin-bottom: 4px; }
.form-group small { display: block; font-size: 0.8rem; color: #777; margin-top: 2px; }

.status-line { margin-top: 8px; font-size: 0.85rem; color: #555; min-height: 1.4em; }
.summary { margin-top: 12px; font-size: 0.9rem; color: #444; line-height: 1.6; }
.table-wrapper { margin-top: 12px; overflow-x: auto; background: #fff; border-radius: 12px; box-shadow: 0 4px 12px rgba(0,0,0,0.04); }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
thead { background: #f3f4f6; }
th, td { padding: 8px 10px; border-bottom: 1px solid #e5e7eb; vertical-align: top; text-align: left; }
td.message { white-space: normal; word-break: break-word; }
th:nth-child(3), td:nth-child(3) { white-space: normal; word-break: break-all; }
tr.group-header td { background: #eff6ff; font-weight: 600; border-top: 1px solid #bfdbfe; }

.pattern-help { margin: 8px 0 0 16px; padding: 0; font-size: 0.8rem; color: #555; }
.pattern-help li { margin-bottom: 2px; }

.footer { margin-top: 32px; font-size: 0.75rem; color: #888; text-align: center; line-height: 1.6; }
.note { font-size: 0.8rem; color: #777; margin-top: 6px; }

.card.narrow { max-width: 520px; margin: 8px auto; }
.form-actions { display: flex; gap: 8px; align-items: center; margin-top: 8px; }

@media (max-width: 768px) {
  .page-header h1 { font-size: 1.5rem; }
  .form-grid { grid-template-columns: minmax(0, 1fr); }
  .form-row.inline { flex-direction: column; }
}