/* ============================================================
   Reusable slide components
   특정 슬라이드가 아니라 "요소" 단위 컴포넌트. 템플릿들이 조합해서 사용.
   ============================================================ */

/* --- Cover --- */
.cover-content {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 900px;
}

.cover-content .subtitle {
  color: var(--color-gold);
  font-size: 18px;
  letter-spacing: 3px;
  font-weight: bold;
  margin-bottom: 15px;
}

.cover-content h1 {
  font-size: 56px;
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: var(--space-2);
}

.cover-content .tagline {
  font-size: 20px;
  color: #a0b2c6;
  margin-bottom: var(--space-6);
}

.core-values {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.value-item {
  background: var(--surface-overlay-dark);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-gold);
  min-width: 200px;
}

.value-icon { font-size: 24px; margin-bottom: 10px; }

.value-item strong {
  display: block;
  font-size: 18px;
  color: var(--color-white);
  margin-bottom: 5px;
}

.value-item span { font-size: 14px; color: #a0b2c6; }

.cover-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-2);
}

.cover-footer .presenter { font-size: 14px; color: #a0b2c6; }

.footer-badges { display: flex; gap: 15px; }

.footer-badges span {
  font-size: 12px;
  background: var(--color-gold-soft);
  color: var(--color-gold);
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid rgba(229, 169, 59, 0.3);
}

/* --- Table of Contents --- */
.toc-container {
  display: flex;
  gap: var(--space-5);
  flex: 1;
}

.toc-left, .toc-right {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toc-section h3 {
  font-size: 20px;
  color: var(--color-blue-accent);
  border-bottom: 2px solid var(--color-blue-accent);
  padding-bottom: 8px;
  margin-bottom: 12px;
}

.toc-section li {
  font-size: 16px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
}

.toc-section li span {
  color: var(--color-gold);
  font-weight: bold;
  margin-right: 15px;
  font-size: 14px;
}

.lighthouse-svg {
  width: 150px;
  height: auto;
  margin-top: var(--space-2);
  opacity: 0.8;
}

/* --- 4-card grid (사업개요 등) --- */
.grid-4-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
  z-index: var(--z-content);
  position: relative;
}

.info-card {
  background: var(--surface-card);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  border-top: 4px solid var(--color-blue-accent);
}

.card-icon { font-size: 32px; margin-bottom: var(--space-2); }
.info-card h3 { font-size: 20px; color: var(--color-ink); margin-bottom: var(--space-2); }

.info-card li {
  font-size: 14px;
  color: #54667a;
  margin-bottom: 8px;
  position: relative;
  padding-left: 12px;
}

.info-card li::before {
  content: "•";
  color: var(--color-gold);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* --- 4-column grid (추진 배경 등) --- */
.grid-4-columns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  z-index: var(--z-content);
  position: relative;
}

.column-item {
  background: rgba(255, 255, 255, 0.9);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--surface-card-border);
}

.col-icon { font-size: 28px; margin-bottom: var(--space-2); }
.column-item h4 { font-size: 18px; color: var(--color-blue-accent); margin-bottom: 10px; }
.column-item p { font-size: 14px; color: #54667a; line-height: 1.5; }

/* --- Media placeholder (Lazy Loading 대상 공통 스타일) --- */
.media-frame {
  position: relative;
  overflow: hidden;
  background: #f5f7fa;
  border: 1px dashed #c9d4e0;
  border-radius: var(--radius-sm);
}

.media-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-standard);
}

.media-frame img.is-loaded { opacity: 1; }

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, #f5f7fa 30%, #fbfcfd 50%, #f5f7fa 70%);
  background-size: 200% 100%;
  animation: media-skeleton 1.4s ease-in-out infinite;
}

.media-frame:has(img.is-loaded)::before { display: none; }

/* 이미지가 로드되면 점선 보더도 자연스럽게 사라짐 (실제 콘텐츠처럼 보이도록) */
.media-frame:has(img.is-loaded) { border-style: solid; border-color: transparent; }

@keyframes media-skeleton {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- 16:9 프레임 (원본이 16:9 슬라이드 이미지이므로 프레임도 16:9로 고정) ---
   부모는 flex center로 감싸고, 이 박스는 aspect-ratio + max-height로 letterbox 처리.
   이미지가 잘리지 않도록 object-fit:contain을 강제한다.
   Before/After 비교 슬라이더(.tpl-simulation__media)는 기존 cover 방식을 유지하므로
   이 클래스를 적용하지 않는다 — Design 비주얼 / Dimension 도면 / Simulation 단일모드 전용. */
.is-16x9 {
  width: 100%;
  aspect-ratio: 16 / 9;
  max-width: 100%;
  max-height: 100%;
}

.media-frame.is-16x9 img {
  object-fit: contain;
}

/* --- Feature card (공통 설명 카드) ---
   Design 템플릿의 Key Features, Simulation 템플릿의 하단 설명 카드가 공유하는
   아이콘 없는 순수 텍스트 카드. 프로젝트마다 제목/설명만 바뀌면 되는 구조. */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.feature-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.feature-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.feature-card {
  background: rgba(43, 76, 126, 0.05);
  border-left: 3px solid var(--color-blue-accent);
  border-radius: 6px;
  padding: 18px 18px 20px;
}

.dark-theme .feature-card {
  background: var(--surface-overlay-dark);
  border-left-color: var(--color-gold);
}

.feature-card__title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.dark-theme .feature-card__title { color: var(--color-white); }

.feature-card__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.dark-theme .feature-card__desc { color: #a0b2c6; }

/* --- Section block (Concept / Material / Summary 등 라벨+본문 단위) --- */
.section-block { margin-bottom: var(--space-4); }
.section-block:last-child { margin-bottom: 0; }

.section-block__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--color-gold);
  margin-bottom: 10px;
  display: block;
}

.section-block__body {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.section-block__body.is-emphasis {
  color: var(--color-ink);
  font-weight: 500;
  padding: 14px 16px;
  background: rgba(229, 169, 59, 0.08);
  border-radius: 6px;
  border-left: 3px solid var(--color-gold);
}