:root {
  --bg-deep: #0a0d14;
  --bg-card: #121722;
  --bg-card-hover: #182030;
  --bg-surface: #171d2b;
  --text-main: #f0f3f8;
  --text-muted: #9ba8bc;
  --text-faint: #67758d;
  --gold: #d4af37;
  --gold-hover: #ecc959;
  --gold-glow: rgba(212, 175, 55, 0.25);
  --blue-vermeer: #2b5c9e;
  --blue-vermeer-dark: #162f52;
  --border-subtle: rgba(212, 175, 55, 0.15);
  --border-card: rgba(255, 255, 255, 0.08);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --font-serif: 'Cinzel', 'Cormorant Garamond', Baskerville, 'Times New Roman', Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(ellipse at 20% 0%, rgba(43, 92, 158, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 10%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(10, 13, 20, 1) 0%, rgba(6, 8, 12, 1) 100%);
  background-attachment: fixed;
}

/* ==========================================================================
   HEADER & HERO
   ========================================================================== */

.hero {
  position: relative;
  padding: 4.5rem 1.5rem 3rem;
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, rgba(23, 29, 43, 0.4) 0%, rgba(10, 13, 20, 0.8) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 250px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 0.8rem;
  display: inline-block;
  font-weight: 500;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #fff;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  margin-bottom: 0.5rem;
}

.hero-title span {
  background: linear-gradient(135deg, #fff 40%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 1.8rem;
  font-weight: 300;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.stat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text-muted);
  backdrop-filter: blur(8px);
}

.stat-chip strong {
  color: var(--gold);
  font-weight: 600;
}

/* ==========================================================================
   NAVIGATION & CONTROLS BAR
   ========================================================================== */

.controls-section {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 13, 20, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-card);
  padding: 1rem 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.controls-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.controls-row-top {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 260px;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint);
  pointer-events: none;
  font-size: 0.95rem;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.6rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-glow);
  background: #1c2333;
}

.search-input::placeholder {
  color: var(--text-faint);
}

.sort-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.sort-select {
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  cursor: pointer;
  transition: var(--transition);
}

.sort-select:focus, .sort-select:hover {
  border-color: var(--gold);
}

.filter-pills {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border-card) transparent;
}

.filter-btn {
  padding: 0.45rem 0.95rem;
  background: transparent;
  border: 1px solid var(--border-card);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: inherit;
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  color: #fff;
  border-color: rgba(212, 175, 55, 0.4);
  background: rgba(255, 255, 255, 0.03);
}

.filter-btn.active {
  background: var(--gold);
  color: #0b0e14;
  border-color: var(--gold);
  font-weight: 600;
}

.count-indicator {
  font-size: 0.85rem;
  color: var(--text-faint);
  margin-left: auto;
  align-self: center;
}

/* ==========================================================================
   CATALOG GRID
   ========================================================================== */

.catalog-main {
  max-width: 1400px;
  width: 100%;
  margin: 2rem auto;
  padding: 0 1.5rem 4rem;
  flex: 1;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.painting-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  outline: none;
}

.painting-card:hover, .painting-card:focus-visible {
  transform: translateY(-5px);
  border-color: rgba(212, 175, 55, 0.5);
  box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.7), 0 0 20px var(--gold-glow);
}

.card-image-box {
  position: relative;
  aspect-ratio: 4 / 4.6;
  background: #080a0f;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  background-color: #0d1118;
}

.painting-card:hover .card-img {
  transform: scale(1.05);
}

.card-overlay-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(10, 13, 20, 0.85);
  backdrop-filter: blur(8px);
  color: var(--gold);
  border: 1px solid var(--border-subtle);
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.card-hover-prompt {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10, 13, 20, 0.95) 100%);
  opacity: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 1.5rem;
  transition: var(--transition);
}

.painting-card:hover .card-hover-prompt {
  opacity: 1;
}

.prompt-pill {
  background: var(--gold);
  color: #0c1017;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  transform: translateY(10px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.painting-card:hover .prompt-pill {
  transform: translateY(0);
}

.card-content {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-museum {
  font-size: 0.78rem;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 0.6rem;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  margin-top: auto;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-faint);
}

.card-tag {
  background: rgba(43, 92, 158, 0.2);
  color: #79a6dc;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(43, 92, 158, 0.3);
}

/* Empty search state */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  color: var(--gold);
  margin-bottom: 1rem;
  opacity: 0.6;
}

/* ==========================================================================
   MODAL LIGHTBOX (<dialog>) - Compliant with modern web guidance
   ========================================================================== */

dialog#modal-viewer {
  width: 95vw;
  max-width: 1500px;
  height: 92vh;
  margin: auto;
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: var(--radius-lg);
  background: #0d121c;
  color: var(--text-main);
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.85), 0 0 30px rgba(0, 0, 0, 0.6);
  padding: 0;
  overflow: hidden;
}

dialog:modal {
  overscroll-behavior: contain;
}

dialog::backdrop {
  overflow: hidden;
  overscroll-behavior: contain;
  background: rgba(6, 9, 14, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.modal-layout {
  display: grid;
  grid-template-columns: 1fr 450px;
  height: 100%;
  width: 100%;
  position: relative;
}

@media (max-width: 1024px) {
  .modal-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 55vh 1fr;
    overflow-y: auto;
  }
}

/* Image viewer viewport (left side) */
.viewer-viewport {
  position: relative;
  background: #07090e;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  cursor: grab;
}

.viewer-viewport:active {
  cursor: grabbing;
}

.viewer-image-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  transform-origin: center center;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.viewer-image {
  max-width: 95%;
  max-height: 95%;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
  pointer-events: auto;
  transition: box-shadow 0.3s;
}

/* Top toolbar over image */
.viewer-toolbar {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  gap: 0.5rem;
  background: rgba(13, 18, 28, 0.85);
  backdrop-filter: blur(8px);
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  z-index: 10;
}

.tool-btn {
  background: transparent;
  border: none;
  color: var(--text-main);
  width: 34px;
  height: 34px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--gold);
}

.zoom-level-text {
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  padding: 0 0.4rem;
  color: var(--text-muted);
  min-width: 42px;
  justify-content: center;
}

/* Nav arrows over image */
.nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(13, 18, 28, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-card);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: var(--transition);
  font-size: 1.3rem;
}

.nav-arrow:hover {
  background: var(--gold);
  color: #0a0d14;
  border-color: var(--gold);
  transform: translateY(-50%) scale(1.1);
}

.nav-prev { left: 1rem; }
.nav-next { right: 1rem; }

.bottom-hint {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 13, 20, 0.75);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 10;
}

/* Detail panel (right side) */
.viewer-panel {
  background: var(--bg-card);
  border-left: 1px solid var(--border-card);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  position: relative;
}

.panel-header {
  padding: 1.5rem 1.8rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
}

.panel-close-form {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.close-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  color: var(--text-main);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.close-btn:hover, .close-btn:focus-visible {
  background: #252e42;
  color: var(--gold);
  border-color: var(--gold);
  transform: rotate(90deg);
}

.panel-period {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.panel-title {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 0.5rem;
  padding-right: 2rem;
}

.panel-meta-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
}

.panel-year-pill {
  background: rgba(212, 175, 55, 0.15);
  color: var(--gold);
  border: 1px solid rgba(212, 175, 55, 0.3);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.78rem;
}

/* Panel content */
.panel-body {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  flex: 1;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  background: var(--bg-surface);
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.meta-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-faint);
  letter-spacing: 0.05em;
}

.meta-value {
  font-size: 0.85rem;
  color: #e4e9f2;
  font-weight: 500;
}

.info-block {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.info-block-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--gold);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.info-block-text {
  font-size: 0.92rem;
  color: #c5d0e0;
  line-height: 1.65;
}

.highlight-box {
  background: rgba(43, 92, 158, 0.1);
  border-left: 3px solid var(--blue-vermeer);
  padding: 1rem 1.2rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.highlight-box .info-block-title {
  color: #8bb6ee;
}

.panel-footer {
  padding: 1.2rem 1.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(13, 18, 28, 0.9);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.btn-open-raw {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.1rem;
  background: var(--gold);
  color: #0b0e14;
  font-weight: 600;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: var(--transition);
}

.btn-open-raw:hover {
  background: var(--gold-hover);
  box-shadow: 0 4px 14px var(--gold-glow);
  transform: translateY(-2px);
}

.counter-badge {
  font-size: 0.82rem;
  color: var(--text-faint);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.page-footer {
  border-top: 1px solid var(--border-card);
  padding: 3rem 1.5rem 4rem;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.85rem;
  background: #080b10;
}

.page-footer p {
  max-width: 600px;
  margin: 0 auto 0.6rem;
}

.page-footer a {
  color: var(--gold);
  text-decoration: none;
}

.page-footer a:hover {
  text-decoration: underline;
}