.preview-index {
  color: #1d1d1b;
  background: #f2f2ee;
}

.preview-index .site-header {
  position: sticky;
  top: 0;
  z-index: 80;
}

.preview-nav-note {
  color: #65655f;
  font-size: 13px;
  font-weight: 700;
}

.preview-intro {
  padding: 72px 0 48px;
  background: #ffffff;
  border-bottom: 1px solid #d9d9d3;
}

.preview-intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: end;
}

.preview-title {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: 48px;
  line-height: 1.2;
  letter-spacing: 0;
}

.preview-copy {
  max-width: 680px;
  margin-bottom: 0;
  color: #65655f;
  font-size: 17px;
}

.preview-summary {
  border-top: 2px solid #1d1d1b;
}

.summary-row {
  min-height: 52px;
  display: grid;
  grid-template-columns: 100px 1fr;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid #d9d9d3;
  font-size: 13px;
}

.summary-row span {
  color: #6a6a64;
}

.summary-row strong {
  font-size: 14px;
}

.concept-list {
  padding: 62px 0 84px;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.concept-card {
  min-width: 0;
  background: #ffffff;
  border: 1px solid #d3d3cc;
  border-radius: 6px;
  overflow: hidden;
}

.concept-preview {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #ddd;
}

.concept-preview::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(18, 18, 16, 0.24);
}

.concept-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 240ms ease;
}

.concept-card:hover .concept-preview img {
  transform: scale(1.025);
}

.concept-letter,
.recommend-badge {
  position: absolute;
  z-index: 2;
  top: 16px;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 11px;
  color: #ffffff;
  font-size: 12px;
  font-weight: 800;
}

.concept-letter {
  left: 16px;
  background: #1d1d1b;
}

.recommend-badge {
  right: 16px;
  background: #c83b32;
}

.concept-copy {
  padding: 25px;
}

.concept-archetype {
  display: block;
  margin-bottom: 8px;
  color: #c83b32;
  font-size: 12px;
  font-weight: 800;
}

.concept-copy h2 {
  margin-bottom: 10px;
  font-size: 25px;
  line-height: 1.35;
}

.concept-copy p {
  min-height: 78px;
  margin-bottom: 22px;
  color: #666660;
  font-size: 14px;
}

.concept-tags {
  min-height: 54px;
  margin-bottom: 22px;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 6px;
}

.concept-tag {
  min-height: 28px;
  padding: 4px 8px;
  display: inline-flex;
  align-items: center;
  color: #51514c;
  background: #f0f0eb;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 700;
}

.concept-card .button {
  width: 100%;
}

.comparison-section {
  padding: 76px 0;
  background: #ffffff;
}

.comparison-table-wrap {
  overflow-x: auto;
  border-top: 2px solid #1d1d1b;
}

.comparison-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  table-layout: fixed;
}

.comparison-table th,
.comparison-table td {
  padding: 17px 15px;
  border-bottom: 1px solid #d9d9d3;
  text-align: left;
  vertical-align: top;
  font-size: 13px;
}

.comparison-table thead th {
  color: #ffffff;
  background: #1d1d1b;
}

.comparison-table tbody th {
  width: 18%;
  font-weight: 800;
}

.preview-footnote {
  padding: 38px 0;
  color: #d3d3cc;
  background: #1d1d1b;
}

.preview-footnote p {
  margin-bottom: 0;
  font-size: 13px;
}

@media (max-width: 980px) {
  .preview-intro-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .concept-grid {
    grid-template-columns: 1fr;
  }

  .concept-card {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
  }

  .concept-preview {
    aspect-ratio: auto;
    min-height: 330px;
  }
}

@media (max-width: 640px) {
  .preview-nav-note {
    display: none;
  }

  .preview-intro {
    padding: 52px 0 40px;
  }

  .preview-title {
    font-size: 36px;
  }

  .concept-list,
  .comparison-section {
    padding: 52px 0;
  }

  .concept-card {
    display: block;
  }

  .concept-preview {
    aspect-ratio: 4 / 3;
    min-height: 0;
  }

  .concept-copy p,
  .concept-tags {
    min-height: 0;
  }

  .preview-footnote {
    padding: 30px 0;
  }
}