/* ── 케이스 스터디 공통 스타일 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0e0e10;
  --bg-card:   #17171a;
  --border:    #2a2a30;
  --accent:    #6c8cf5;
  --accent-dim:#6c8cf518;
  --personal:  #a478f0;
  --text-1:    #f0f0f4;
  --text-2:    #a0a0b0;
  --text-3:    #55556a;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans KR', 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── 탑 네비게이션 ── */
.case-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(14,14,16,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 12px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.case-nav-back {
  font-size: 13px;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 6px;
}
.case-nav-back:hover { color: var(--accent); text-decoration: none; }

.case-nav-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-3);
}

/* ── 히어로 ── */
.case-hero {
  padding: 120px 32px 64px;
  max-width: 800px;
  margin: 0 auto;
}

.case-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.case-hero h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-1);
  margin-bottom: 16px;
}

.case-hero-desc {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 640px;
}

.case-meta {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.case-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.case-meta-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.case-meta-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
}

/* ── 케이스 목차 ── */
.case-toc {
  max-width: 800px;
  margin: 0 auto 64px;
  padding: 0 32px;
  display: flex;
  gap: 12px;
}

.case-toc-item {
  flex: 1;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}
.case-toc-item:hover {
  border-color: var(--accent);
  background: rgba(108,140,245,0.05);
  text-decoration: none;
}

.case-toc-num {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.06em;
  flex-shrink: 0;
  padding-top: 1px;
}

.case-toc-item strong {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 3px;
}

.case-toc-hypothesis {
  display: block;
  font-size: 11px;
  color: var(--text-2);
  margin-bottom: 2px;
}

.case-toc-result {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
}

/* ── 케이스 디바이더 ── */
.case-divider {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 32px;
}

.case-divider-inner {
  border-top: 1px solid var(--border);
  padding-top: 48px;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.case-divider-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  background: rgba(108,140,245,0.1);
  padding: 4px 10px;
  border-radius: 4px;
  flex-shrink: 0;
}

.case-divider-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
}

.case-divider-result {
  margin-left: auto;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
}

/* ── 라이트박스 ── */
.zoomable { cursor: zoom-in; }

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,.85);
  backdrop-filter: blur(8px);
  cursor: zoom-out;
  align-items: center;
  justify-content: center;
  padding: 32px;
}
.lightbox.open { display: flex; }

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 8px;
  box-shadow: 0 8px 40px rgba(0,0,0,.5);
  animation: lbIn .25s ease;
}

@keyframes lbIn {
  from { opacity: 0; transform: scale(.92); }
  to { opacity: 1; transform: scale(1); }
}

/* ── 맨 위로 ── */
.case-back-top {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 32px 32px;
  text-align: center;
}

.case-back-top-btn {
  display: inline-block;
  font-size: 12px;
  color: var(--text-3);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 20px;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}
.case-back-top-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ── 이미지 ── */
.case-img {
  max-width: 800px;
  margin: 0 auto 64px;
  padding: 0 32px;
}

.case-img img,
.case-img video {
  width: 100%;
  border-radius: 12px;
  display: block;
}

.case-img canvas {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

/* ── 캐러셀 (인라인 썸네일) ── */
.case-carousel {
  margin: 24px 0;
}

.carousel-caption {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 8px;
}

.carousel-track {
  display: flex;
  gap: 6px;
}

.carousel-slide {
  flex: 1;
  min-width: 0;
  border-radius: 6px;
  overflow: hidden;
}

.carousel-slide img {
  width: 100%;
  display: block;
}

@media (max-width: 768px) {
  .carousel-track { overflow-x: auto; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
  .carousel-slide { flex: 0 0 80%; scroll-snap-align: start; }
}

/* Before / After 비교 */
.case-compare {
  max-width: 800px;
  margin: 0 auto 64px;
  padding: 0 32px;
}

.case-compare-header {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 16px;
}

.compare-tab {
  padding: 6px 20px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}
.compare-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.compare-tab:hover:not(.active) {
  border-color: var(--text-2);
  color: var(--text-2);
}

.compare-panel {
  display: none;
}
.compare-panel.active {
  display: block;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.compare-item {
  position: relative;
}

.compare-item img {
  width: 100%;
  border-radius: 10px;
  display: block;
  border: 1px solid var(--border);
}

.compare-label {
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 4px;
  backdrop-filter: blur(8px);
}
.compare-grid.compact {
  gap: 12px;
}
.compare-grid.compact img {
  max-height: 220px;
  width: 100%;
  object-fit: contain;
}
.compare-grid.mini {
  gap: 10px;
  margin-top: 24px;
}
.compare-grid.mini img {
  max-height: 160px;
}

/* ── 텍스트 + 이미지 가로 배치 ── */
.case-side-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
  margin-top: 8px;
}
.case-side-text {
  display: flex;
  flex-direction: column;
}
.case-side-imgs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.case-side-imgs img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
}
@media (max-width: 768px) {
  .case-side-layout { grid-template-columns: 1fr; gap: 20px; }
  .case-side-imgs { grid-template-columns: repeat(4, 1fr); }
}

/* ── 좌우 2컬럼 이미지 그룹 ── */
.case-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.case-two-col-group .compare-row {
  margin-bottom: 6px;
}
.case-two-col-group .compare-row img {
  height: 160px;
}
@media (max-width: 768px) {
  .case-two-col { grid-template-columns: 1fr; gap: 16px; }
}

.compare-label.before {
  background: rgba(255,255,255,0.15);
  color: var(--text-2);
}
.compare-label.after {
  background: rgba(108,140,245,0.25);
  color: var(--accent);
}

/* 행 단위 Before / After */
.compare-row-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
  text-align: center;
}
.compare-row-label.before { color: var(--text-3); }
.compare-row-label.after  { color: var(--accent); }

.compare-row {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 16px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
}

.compare-row img {
  height: 180px;
  width: auto;
  border-radius: 8px;
  flex-shrink: 0;
}

/* UI 비교 전체 감싸기 */
.compare-screens-wrap {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 16px 12px;
}

.case-img-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--text-3);
}

.case-img-visit {
  position: absolute;
  top: 16px;
  right: 48px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(8px);
  padding: 6px 14px;
  border-radius: 20px;
  text-decoration: none;
  z-index: 2;
  transition: background 0.2s;
}
.case-img-visit:hover {
  background: var(--accent);
  text-decoration: none;
  color: #fff;
}

.case-img-caption {
  font-size: 11px;
  color: var(--text-3);
  text-align: center;
  margin-top: 8px;
}

/* ── 테이블 ── */
.case-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.case-table th {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  text-align: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  letter-spacing: 0.02em;
}
.case-table td {
  color: var(--text-2);
  text-align: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
.case-table td:first-child {
  text-align: left;
  color: var(--text-3);
  font-weight: 500;
}
.case-table strong {
  color: var(--text-1);
}
.case-table code {
  font-size: 12px;
  color: var(--accent);
  background: rgba(108,140,245,0.08);
  padding: 2px 7px;
  border-radius: 4px;
  white-space: nowrap;
}

/* ── 섹션 ── */
.case-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 32px 64px;
}

.case-section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.case-section h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 20px;
}

.case-section p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 16px;
}

.case-section strong { color: var(--text-1); }

/* 하이라이트 블록 */
.case-highlight {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 20px 24px;
  margin: 24px 0;
}

.case-highlight p {
  font-size: 14px;
  margin-bottom: 0;
}

/* 성과 그리드 */
.case-results {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.case-result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

.case-result-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}

.case-result-label {
  font-size: 12px;
  color: var(--text-3);
}

/* 타임라인 (프로세스) */
.case-process {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 24px 0;
}

.case-step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 0 20px;
  padding-bottom: 24px;
  position: relative;
}

.case-step::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 28px; bottom: 0;
  width: 1px;
  background: var(--border);
}
.case-step:last-child::before { display: none; }

.case-step-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.case-step-content h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 6px;
}

.case-step-content p {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 0;
}

/* 러닝 블록 */
.case-learning {
  background: #a478f008;
  border: 1px solid #a478f025;
  border-left: 3px solid var(--personal);
  border-radius: 0 8px 8px 0;
  padding: 20px 24px;
  margin: 24px 0;
}

.case-learning-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--personal);
  margin-bottom: 8px;
}

.case-learning p {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 0;
}

/* ── 하단 네비게이션 ── */
.case-footer-nav {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 32px 64px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.case-footer-link {
  font-size: 13px;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 6px;
}
.case-footer-link:hover { color: var(--accent); text-decoration: none; }

.case-footer-link strong {
  color: var(--text-1);
  font-size: 15px;
}

/* ── 사이드 인디케이터 ── */
.case-side-nav {
  position: fixed;
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.case-side-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-3);
  transition: color 0.25s;
}
.case-side-nav a:hover {
  color: var(--text-2);
  text-decoration: none;
}
.case-side-nav a.active {
  color: var(--accent);
}

.side-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--text-3);
  background: transparent;
  flex-shrink: 0;
  transition: border-color 0.25s, background 0.25s, transform 0.25s;
}
.case-side-nav a:hover .side-dot {
  border-color: var(--text-2);
}
.case-side-nav a.active .side-dot {
  border-color: var(--accent);
  background: var(--accent);
  transform: scale(1.2);
}

.side-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s, transform 0.2s;
}
.case-side-nav a:hover .side-label,
.case-side-nav a.active .side-label {
  opacity: 1;
  transform: translateX(0);
}

/* ── 반응형 ── */
@media (max-width: 768px) {
  .case-hero { padding: 100px 20px 40px; }
  .case-hero h1 { font-size: 24px; }
  .case-hero-desc { font-size: 14px; }
  .case-section { padding: 0 20px 48px; }
  .case-section h2 { font-size: 20px; }
  .case-img { padding: 0 20px; margin-bottom: 48px; }
  .case-meta { gap: 20px; }
  .case-results { grid-template-columns: 1fr 1fr; }
  .case-nav { padding: 12px 16px; }
  .case-footer-nav { padding: 24px 20px 48px; flex-direction: column; }
  .case-toc { flex-direction: column; padding: 0 20px; }
  .case-compare { padding: 0 16px; }
  .compare-grid { grid-template-columns: 1fr; }
  .compare-row img { height: 200px; }
  .case-side-nav { display: none; }
}