* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft JhengHei", sans-serif;
  background-color: #f1f5f9;
  color: #0f172a;
  line-height: 1.6;
}

body.dialog-open {
  overflow: hidden;
}

main.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 3vw, 2rem);
  min-height: 100vh;
}

.search-card {
  background: #ffffff;
  border-radius: 1rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid #e2e8f0;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
}

.search-card h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
}

.intro {
  margin: 0 0 1.25rem;
  color: #475569;
}

.view-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 1rem;
}

.view-link,
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.78rem;
  border: 1px solid #cbd5e1;
  border-radius: 999px;
  background: #f8fafc;
  color: #0f172a;
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  line-height: 1.2;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.view-link:hover,
.theme-toggle:hover {
  border-color: #94a3b8;
  background: #e2e8f0;
}

.theme-toggle {
  cursor: pointer;
}

.view-link.is-active,
.view-link[aria-current="page"] {
  border-color: #0f172a;
  background: #0f172a;
  color: #f8fafc;
}

.search-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #1f2937;
}

.search-control {
  display: flex;
  align-items: center;
}

#keyword {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid #cbd5f5;
  border-radius: 0.75rem;
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#keyword:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.result-summary {
  margin-top: 1rem;
  color: #334155;
  font-size: 0.95rem;
}

.result-section {
  flex: 1;
}

.result-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.result-item {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 0.9rem;
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  cursor: pointer;
  min-height: 136px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.result-item:hover,
.result-item:focus-visible {
  transform: translateY(-3px);
  border-color: #38bdf8;
  box-shadow: 0 16px 32px rgba(14, 116, 144, 0.2);
  outline: none;
}

.result-item .cas {
  font-weight: 700;
  color: #0f172a;
}

.result-item .name {
  color: #334155;
}

.result-item .formula {
  font-size: 0.85rem;
  color: #64748b;
}

.result-ghs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  margin-top: auto;
  min-height: 1.75rem;
}

.result-ghs-icon {
  width: 1.75rem;
  height: 1.75rem;
  object-fit: contain;
  border: 1px solid #cbd5e1;
  border-radius: 0.45rem;
  background: #ffffff;
  padding: 0.12rem;
}

.result-ghs-empty {
  font-size: 0.78rem;
  color: #94a3b8;
}

.result-ghs-more {
  font-size: 0.72rem;
  color: #334155;
  background: #e2e8f0;
  border-radius: 999px;
  padding: 0.1rem 0.45rem;
}

.empty-hint {
  grid-column: 1 / -1;
  background: rgba(226, 232, 240, 0.55);
  border: 1px dashed #cbd5f5;
  border-radius: 0.75rem;
  padding: 2rem;
  text-align: center;
  color: #64748b;
}

dialog.detail-dialog {
  border: none;
  border-radius: 1.1rem;
  padding: 0;
  width: min(960px, calc(100vw - 2rem));
  background: transparent;
  color: inherit;
}

dialog.detail-dialog::backdrop {
  background: rgba(15, 23, 42, 0.55);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.detail-dialog[open] {
  animation: dialogFadeIn 0.2s ease;
}

.dialog-inner {
  background: #ffffff;
  border-radius: 1.1rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.35);
  max-height: calc(90vh - 2rem);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.dialog-close {
  align-self: flex-end;
  border: none;
  background: #f1f5f9;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  font-size: 1.5rem;
  color: #0f172a;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.2);
  transition: background 0.2s ease;
}

.dialog-close:hover {
  background: #e2e8f0;
}

.dialog-header h2 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.75rem;
}

.detail-chip {
  display: inline-flex;
  align-items: center;
  background: #f1f5f9;
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font-size: 0.9rem;
  color: #1f2937;
}

.dialog-body {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}


.detail-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem 1.25rem;
  margin: 0;
}

.detail-info div {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.detail-info dt {
  font-weight: 600;
  color: #1f2937;
}

.detail-info dd {
  margin: 0;
  color: #334155;
}

.hazard-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.hazard-tag {
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: #fee2e2;
  color: #b91c1c;
  font-size: 0.85rem;
}

.ghs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.75rem;
  margin-top: 0.65rem;
}

.ghs-card {
  border: 1px solid #cbd5f5;
  border-radius: 0.85rem;
  padding: 0.65rem;
  background: #f8fafc;
  text-align: center;
  display: grid;
  gap: 0.45rem;
  justify-items: center;
  min-height: 100px;
}

.ghs-card img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.ghs-card figcaption {
  margin: 0;
  font-size: 0.85rem;
  color: #0f172a;
}

.aid-list {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: #334155;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.section-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.section-header button {
  padding: 0.45rem 0.85rem;
  font-size: 0.9rem;
  border-radius: 0.6rem;
  border: 1px solid #1d4ed8;
  background: #1d4ed8;
  color: #ffffff;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.section-header button:disabled {
  opacity: 0.55;
  cursor: default;
}

.section-header button:not(:disabled):hover {
  background: #1e40af;
  border-color: #1e40af;
}

.markdown-content {
  border: 1px solid #cbd5f5;
  border-radius: 0.75rem;
  background: #f8fafc;
  padding: 1rem;
  max-height: 320px;
  overflow: auto;
  color: #1f2937;
}

.markdown-content pre {
  background: #0f172a;
  color: #f8fafc;
  padding: 0.75rem;
  border-radius: 0.5rem;
  overflow-x: auto;
}

.markdown-content ul,
.markdown-content ol {
  padding-left: 1.2rem;
}

@media (max-width: 640px) {
  .search-card {
    padding: 1.25rem;
  }

  .dialog-inner {
    padding: 1.35rem;
  }
}

.detail-dialog[data-polyfill] {
  display: none;
}

.detail-dialog[data-polyfill].is-open {
  display: flex;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 1000;
}

.detail-dialog[data-polyfill] .dialog-inner {
  max-height: calc(100vh - 3rem);
}

@keyframes dialogFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}