:root {
  --portfolio-bg: #232323;
  --portfolio-surface: #303030;
  --portfolio-soft: #232323;
  --portfolio-text: #ccc;
  --portfolio-secondary: #aaa;
  --portfolio-line: #555;
  --portfolio-accent: #ED1B23;
  --portfolio-overlay: rgba(237, 27, 35, .50);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--portfolio-bg); color: var(--portfolio-text); }
body { font-family: Arial, "Malgun Gothic", "Apple SD Gothic Neo", sans-serif; }
a { color: inherit; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.portfolio-filter-bar { position: relative; z-index: 100; display: flex; height: 62px; justify-content: center; align-items: center; flex-wrap: wrap; gap: 0; padding: 0 20px; background: rgba(0,0,0,.70); border: 0; }
.portfolio-filter { padding: 8px 16px; color: var(--portfolio-secondary); font-size: 12px; text-decoration: none; }
.portfolio-filter:hover, .portfolio-filter:focus-visible, .portfolio-filter.selected { color: var(--portfolio-accent); font-weight: 700; }

.portfolio-grid { display: grid; width: 100%; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; padding: 0; margin: 0; list-style: none; }
.portfolio-hero { display: none; }
.portfolio-hero p { margin: 0 0 12px; font-size: 17px; letter-spacing: .1em; }
.portfolio-hero h1 { margin: 0; color: #ED1B23; font-size: 70px; line-height: 1.1; }
.portfolio-down { display: inline-block; margin-top: 40px; color: #fff; font-size: 30px; text-decoration: none; }
.portfolio-item { min-width: 0; overflow: hidden; background: var(--portfolio-soft); }
.portfolio-item[hidden] { display: none; }
.portfolio-item-link { position: relative; display: block; width: 100%; aspect-ratio: 1.5 / 1; overflow: hidden; text-decoration: none; }
.portfolio-thumb { display: block; width: 100%; height: 100%; object-fit: cover; }
.portfolio-empty-thumb { display: grid; width: 100%; height: 100%; place-items: center; color: var(--portfolio-secondary); background: var(--portfolio-soft); font-size: 11px; letter-spacing: .08em; }
.portfolio-overlay { position: absolute; inset: 0; z-index: 2; color: #fff; background: var(--portfolio-overlay); transform: translateY(100%); opacity: 0; transition: transform .42s ease, opacity .28s ease; }
.portfolio-item-link:hover .portfolio-overlay, .portfolio-item-link:focus-visible .portfolio-overlay { transform: translateY(0); opacity: 1; }
.portfolio-plus { position: absolute; top: 16px; right: 22px; margin: 0; font-size: 38px; font-weight: 300; line-height: 1; }
.portfolio-title-en { position: absolute; top: 23px; left: 28px; right: 65px; margin: 0; font-size: 18px; font-weight: 600; line-height: 1.35; }
.portfolio-overlay-bottom { position: absolute; left: 28px; right: 28px; bottom: 24px; }
.portfolio-category { margin: 0 0 4px; font-size: 11px; line-height: 1.4; }
.portfolio-title-ko { margin: 0; font-size: 13px; font-weight: 700; line-height: 1.4; }

.portfolio-detail-page { min-height: 100vh; background: var(--portfolio-bg); }
.portfolio-detail-page #mobile_header { height: 76px; background: var(--portfolio-bg); }
.portfolio-detail-page .portfolio-filter-bar { display: none; }
.portfolio-detail { position: relative; width: calc(100vw - 64px); max-width: none; margin: 0 auto; padding: 96px 0 70px; }
.portfolio-detail-actions { position: absolute; top: 96px; left: 0; z-index: 2; display: flex; justify-content: flex-start; align-items: center; margin: 0; }
.portfolio-back { display: inline-flex; align-items: center; justify-content: center; min-width: 104px; height: 30px; border: 0; background: transparent; color: var(--portfolio-text); font-size: 12px; letter-spacing: .04em; text-decoration: none; }
.portfolio-back:hover, .portfolio-back:focus-visible { border-color: var(--portfolio-accent); color: var(--portfolio-accent); }
.portfolio-project-info { display: grid; grid-template-columns: minmax(260px, .65fr) minmax(480px, 1.35fr); gap: 48px; min-height: 0; padding: 34px 0 14px; border-bottom: 1px solid var(--portfolio-line); }
.portfolio-project-title { margin: 0 0 7px; color: #2B2926; font-size: 26px; font-weight: 600; line-height: 1.2; letter-spacing: -.025em; }
.portfolio-project-title span { font-size: 16px; font-weight: 400; }
.portfolio-project-title .portfolio-project-subtitle { display: block; margin-top: 2px; color: var(--portfolio-secondary); font-size: 14px; font-weight: 400; line-height: 1.4; letter-spacing: 0; }
.portfolio-project-category { display: none; }
.portfolio-project-summary { margin: 0; color: var(--portfolio-secondary); font-size: 13px; line-height: 1.45; }
.portfolio-project-description[hidden] { display: none; }
.portfolio-project-details { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 28px; align-content: start; margin: 0; color: var(--portfolio-secondary); font-size: 12px; line-height: 1.45; }
.portfolio-project-detail { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 10px; margin: 0; }
.portfolio-project-detail:first-child { grid-column: 1 / -1; }
.portfolio-project-detail dt { color: var(--portfolio-text); font-weight: 500; }
.portfolio-project-detail dd { min-width: 0; margin: 0; }
.portfolio-viewer { position: relative; width: 100%; min-height: 0; background: transparent; overflow: hidden; touch-action: pan-y; }
.portfolio-slides { position: relative; display: block; width: 100%; height: 76vh; margin: 0; padding: 0; overflow: hidden; background: var(--portfolio-soft); list-style: none; }
.portfolio-slide { position: absolute; inset: 0; z-index: 1; display: flex; width: 100%; height: 100%; align-items: center; justify-content: center; opacity: 0; visibility: visible; pointer-events: none; transition: opacity .6s ease-in-out; will-change: opacity; }
.portfolio-slide.active { z-index: 2; opacity: 1; }
.portfolio-slide img, .portfolio-slide-clone img { display: block; max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; }
.portfolio-detail-page .viewer-prev, .portfolio-detail-page .viewer-next { position: absolute; z-index: 5; top: 38vh; width: 52px; height: 72px; margin-top: -36px; padding: 0; border: 0; background: transparent; color: #FFFFFF; cursor: pointer; font-size: 0; opacity: .88; filter: drop-shadow(0 1px 4px rgba(0,0,0,.35)); transition: opacity .25s ease; }
.viewer-prev { left: 28px; }
.viewer-next { right: 28px; }
.portfolio-detail-page .viewer-prev:hover, .portfolio-detail-page .viewer-prev:focus-visible, .portfolio-detail-page .viewer-next:hover, .portfolio-detail-page .viewer-next:focus-visible { opacity: 1; }
.viewer-prev::before, .viewer-next::before { content: ""; display: block; width: 26px; height: 26px; margin: auto; border-top: 2px solid currentColor; border-left: 2px solid currentColor; }
.viewer-prev::before { transform: rotate(-45deg); }
.viewer-next::before { transform: rotate(135deg); }
.viewer-thumbnails { position: relative; z-index: 6; display: flex; gap: 6px; justify-content: flex-start; overflow-x: auto; padding: 10px 0 4px; background: transparent; scrollbar-width: thin; }
.viewer-thumb { flex: 0 0 auto; width: 68px; height: 44px; padding: 0; border: 1px solid transparent; background: #232323; cursor: pointer; opacity: .58; }
.portfolio-detail-page .viewer-thumb.active { border-color: #2B2926; opacity: 1; }
.viewer-thumb img { display: block; width: 100%; height: 100%; object-fit: cover; }
.portfolio-detail-actions-bottom { display: none; }
.portfolio-empty-viewer { display: grid; min-height: min(62vh, 650px); place-items: center; color: var(--portfolio-secondary); background: var(--portfolio-soft); font-size: 12px; letter-spacing: .05em; }

@media (max-width: 1200px) {
  .portfolio-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  .portfolio-detail-page #mobile_header { height: 59px; }
  .portfolio-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .portfolio-overlay { top: auto; height: 68px; transform: none; opacity: 1; background: rgba(43,41,38,.50); }
  .portfolio-plus, .portfolio-title-en { display: none; }
  .portfolio-overlay-bottom { left: 15px; bottom: 13px; }
  .portfolio-detail { width: 100%; padding: 76px 0 50px; }
  .portfolio-detail-actions { top: 76px; right: auto; left: 15px; }
  .portfolio-project-info { display: block; min-height: 0; padding: 34px 15px 18px; }
  .portfolio-project-details { margin-top: 14px; }
  .portfolio-viewer { height: auto; }
  .portfolio-slides { min-height: 0; height: 60vh; }
  .portfolio-detail-page .viewer-prev, .portfolio-detail-page .viewer-next { top: 30vh; width: 42px; height: 58px; margin-top: -29px; }
  .viewer-prev::before, .viewer-next::before { width: 21px; height: 21px; }
  .viewer-thumbnails { padding: 9px 15px 4px; }
}
@media (max-width: 480px) {
  .portfolio-list-page .portfolio-filter-bar { margin-top: 59px; }
  .portfolio-detail-page #mobile_header { height: 76px; }
  .portfolio-filter-bar { justify-content: center; height: auto; min-height: 62px; padding: 7px 78px 7px 8px; }
  .portfolio-filter { padding: 7px 9px; font-size: 11px; }
  .portfolio-project-title { font-size: 24px; }
  .portfolio-project-title span { font-size: 14px; }
  .portfolio-project-info { padding: 0 15px 18px; }
  .portfolio-project-details { grid-template-columns: 1fr; gap: 5px; }
  .portfolio-project-detail:first-child { grid-column: auto; }
  .portfolio-detail-actions { position: static; justify-content: flex-start; padding: 0 15px 12px; }
  .portfolio-back { justify-content: flex-start; min-width: 0; }
  .portfolio-viewer { height: auto; }
  .portfolio-slides { height: 60vh; }
  .viewer-thumb { width: 60px; height: 39px; }
}