/* gallery.css - 갤러리 페이지 블랙 테마 통일 및 디자인 고도화 버전 */

/* 갤러리 페이지 전용 다크 변수 강제 설정 */
body.gallery-page {
  --bg-primary: #010409;
  --bg-secondary: #0d1117;
  --bg-tertiary: #161b22;
  --text-primary: #f0f6fc;
  --text-secondary: #c9d1d9;
  --text-tertiary: #8b949e;
  --border-color: #30363d;
  --github-accent: #1f6feb;
  --accent-glow: rgba(31, 111, 235, 0.4);
  
  font-family: var(--font-sans);
  background-color: var(--bg-primary) !important;
  color: var(--text-primary);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 갤러리 헤더 - 블랙 테마 통일 */
.gallery-page .site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(1, 4, 9, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 3rem;
  border-bottom: 1px solid var(--border-color);
}

.gallery-page .site-header .logo a {
  font-size: 1.4rem;
  font-weight: 900;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.03em;
  background: linear-gradient(120deg, #fff, #8b949e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gallery-page .site-header .nav-link {
  color: var(--text-tertiary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s ease;
  padding: 0.5rem 1rem;
  border-radius: 8px;
}

.gallery-page .site-header .nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

/* 갤러리 툴바 (필터 영역) */
.gallery-toolbar {
  padding: 4rem 2rem 3rem;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
}

.toolbar-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.toolbar-left .page-title {
  margin: 0;
  font-size: 3rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.04em;
}

.toolbar-left .page-sub {
  margin: 0.8rem 0 0;
  color: var(--text-tertiary);
  font-size: 1.2rem;
  font-weight: 500;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.filter-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.select-wrapper {
  position: relative;
  min-width: 220px;
}

.gallery-select {
  width: 100%;
  appearance: none;
  padding-right: 3rem;
  cursor: pointer;
}

.select-arrow {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
  font-size: 0.9rem;
}

/* Masonry 그리드 */
.masonry {
  --gallery-gap: 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gallery-gap);
  width: 100%;
  padding: 4rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.masonry-sizer,
.masonry-gutter {
  display: none;
}

/* Masonry.js가 활성화되면 CSS Grid 대체 레이아웃에서 전환한다. */
.masonry.is-masonry {
  display: block;
}

.masonry.is-masonry .masonry-sizer,
.masonry.is-masonry .masonry-gutter {
  display: block;
  height: 0;
}

.masonry.is-masonry .masonry-sizer,
.masonry.is-masonry .photo-card {
  width: calc(25% - 18px);
}

.masonry.is-masonry .masonry-gutter {
  width: var(--gallery-gap);
}

@media (max-width: 1200px) {
  .masonry {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .masonry.is-masonry .masonry-sizer,
  .masonry.is-masonry .photo-card {
    width: calc(33.3333% - 16px);
  }
}

@media (max-width: 900px) {
  .masonry {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .masonry.is-masonry .masonry-sizer,
  .masonry.is-masonry .photo-card {
    width: calc(50% - 12px);
  }
}

@media (max-width: 600px) {
  .masonry {
    --gallery-gap: 16px;
    grid-template-columns: 1fr;
    padding: 2rem 1rem;
  }

  .masonry.is-masonry .masonry-sizer,
  .masonry.is-masonry .photo-card {
    width: 100%;
  }
}

.photo-card {
  display: block;
  min-width: 0;
  width: 100%;
  text-decoration: none;
}

.masonry.is-masonry .photo-card {
  margin-bottom: var(--gallery-gap);
}

.photo-card[hidden] {
  display: none !important;
}

.card-figure {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.card-figure img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.photo-card:hover .card-figure {
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8), 0 0 0 1px var(--github-accent);
  border-color: var(--github-accent);
}

.photo-card:hover .card-figure img {
  transform: scale(1.08);
}

/* 캡션 오버레이 */
.card-caption {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem 2rem 1rem 2rem;
  background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.4) 30%, transparent 70%);
  opacity: 0;
  transition: all 0.4s ease;
  transform: translateY(10px);
}

.photo-card:hover .card-caption {
  opacity: 1;
  transform: translateY(0);
}

.card-caption .title {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.card-caption .meta {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  font-weight: 500;
}

/* 몰입형 사진 뷰어 */
.gallery-detail-page .site-header {
  display: none;
}

.photo-viewer {
  --viewer-topbar-height: 64px;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  color: #f0f6fc;
  background: #010409;
}

.photo-viewer--modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  height: 100vh;
  height: 100dvh;
}

.photo-viewer[hidden] {
  display: none !important;
}

.photo-viewer__topbar {
  position: relative;
  z-index: 6;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: var(--viewer-topbar-height);
  padding: 0 1.5rem;
  background: #010409;
  border-bottom: 1px solid rgba(240, 246, 252, 0.1);
}

.photo-viewer__back {
  justify-self: start;
}

.photo-viewer__counter {
  color: var(--text-tertiary);
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.photo-viewer__tools {
  display: flex;
  justify-self: end;
  align-items: center;
  gap: 0.25rem;
}

.photo-viewer__info-toggle,
.photo-viewer__panel-close {
  display: none;
}

.photo-viewer__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  height: calc(100vh - var(--viewer-topbar-height));
  height: calc(100dvh - var(--viewer-topbar-height));
  overflow: hidden;
}

.photo-viewer__stage {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 4.5rem;
  overflow: hidden;
  background: #000;
  touch-action: pan-y;
}

.photo-viewer__image {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  border: 1px solid rgba(240, 246, 252, 0.1);
  border-radius: 8px;
  user-select: none;
  -webkit-user-drag: none;
}

.photo-viewer__nav {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 44px;
  min-height: 44px;
  padding: 0;
  color: #f0f6fc;
  background: rgba(1, 4, 9, 0.55);
  border-color: rgba(240, 246, 252, 0.16);
  transform: translateY(-50%);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  opacity: 0.72;
}

.photo-viewer__nav:hover:not(:disabled) {
  color: #fff;
  background: rgba(31, 111, 235, 0.9);
  border-color: rgba(255, 255, 255, 0.24);
  transform: translateY(-50%);
  opacity: 1;
}

.photo-viewer__nav:disabled {
  opacity: 0;
}

.photo-viewer__nav--prev {
  left: 1.25rem;
}

.photo-viewer__nav--next {
  right: 1.25rem;
}

.photo-viewer__panel {
  min-width: 0;
  padding: 2rem 1.5rem;
  overflow-y: auto;
  background: #0d1117;
  border-left: 1px solid rgba(240, 246, 252, 0.1);
}

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

.photo-viewer__eyebrow {
  margin: 0;
  color: var(--text-tertiary);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.photo-viewer__title {
  margin: 0.75rem 0 2rem;
  color: #fff;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.025em;
  overflow-wrap: anywhere;
}

.photo-viewer__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-flow: row dense;
  column-gap: 1.5rem;
  margin: 0;
  border-top: 1px solid rgba(240, 246, 252, 0.1);
}

.photo-viewer__meta-item {
  min-width: 0;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(240, 246, 252, 0.1);
}

.photo-viewer__meta-item--wide {
  grid-column: 1 / -1;
}

.photo-viewer__meta dt {
  margin: 0 0 0.4rem;
  color: var(--text-tertiary);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.photo-viewer__meta dd {
  margin: 0;
  color: #f0f6fc;
  font-size: 0.9375rem;
  font-weight: 550;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.photo-viewer__empty-meta {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1rem 0;
  color: var(--text-tertiary);
  font-size: 0.875rem;
  border-bottom: 1px solid rgba(240, 246, 252, 0.1);
}

.photo-viewer:fullscreen {
  width: 100vw;
  height: 100vh;
}

@media (max-width: 1100px) {
  .photo-viewer__layout {
    grid-template-columns: minmax(0, 1fr) 300px;
  }

  .photo-viewer__stage {
    padding-inline: 3.75rem;
  }
}

@media (max-width: 768px) {
  .gallery-page .site-header { padding: 1rem 1.25rem; }
  .gallery-page .site-header .logo a { font-size: 1.2rem; }
  .gallery-toolbar { padding: 2.5rem 1.25rem 1.5rem; }
  .toolbar-container { flex-direction: column; align-items: flex-start; gap: 1.2rem; }
  .toolbar-left .page-title { font-size: 2rem; }
  .toolbar-left .page-sub { font-size: 1.05rem; }
  .select-wrapper { min-width: 100%; }
  .filter-group { width: 100%; }

}

@media (max-width: 900px) {
  .photo-viewer {
    --viewer-topbar-height: 56px;
  }

  .photo-viewer__topbar {
    padding-inline: 0.75rem;
  }

  .photo-viewer__layout {
    display: block;
  }

  .photo-viewer__stage {
    width: 100%;
    height: calc(100vh - var(--viewer-topbar-height));
    height: calc(100dvh - var(--viewer-topbar-height));
    padding: 0.75rem 3.25rem;
  }

  .photo-viewer__image {
    border-radius: 6px;
  }

  .photo-viewer__nav {
    width: 40px;
    min-height: 40px;
  }

  .photo-viewer__nav--prev {
    left: 0.5rem;
  }

  .photo-viewer__nav--next {
    right: 0.5rem;
  }

  .photo-viewer__info-toggle,
  .photo-viewer__panel-close {
    display: inline-flex;
  }

  .photo-viewer__panel {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 8;
    width: 100%;
    max-height: min(68vh, 620px);
    max-height: min(68dvh, 620px);
    padding: 1.25rem 1.25rem max(1.5rem, env(safe-area-inset-bottom));
    background: rgba(13, 17, 23, 0.98);
    border-top: 1px solid rgba(240, 246, 252, 0.14);
    border-left: 0;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 -24px 70px rgba(0, 0, 0, 0.5);
    transform: translateY(100%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 220ms ease, visibility 220ms step-end;
  }

  .photo-viewer.is-info-open .photo-viewer__panel {
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform 220ms ease, visibility 0s;
  }

  .photo-viewer__title {
    margin-bottom: 1.25rem;
  }
}

@media (max-width: 560px) {
  .photo-viewer__tool-label,
  .photo-viewer--modal .photo-viewer__close {
    display: none;
  }

  .photo-viewer__back,
  .photo-viewer__tools .btn {
    padding-inline: 0.625rem;
  }

  .photo-viewer__counter {
    font-size: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .photo-viewer__panel {
    transition: none;
  }
}

/* Empty State */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 8rem 0;
  color: var(--text-tertiary);
  font-size: 1.4rem;
  font-weight: 500;
}