:root {
  --bg: #0d1117;
  --fg: #f5f5f5;
  --accent: #e5a10f;
  --muted: #94a1b2;
  --card: #161b22;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg);
  color: var(--fg);
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(180deg, rgba(14,18,23,.96), rgba(14,18,23,.8));
  backdrop-filter: blur(6px);
  padding: 0.8rem 1rem;
}

.logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.nav-toggle {
  font-size: 1.4rem;
  width: 2.2rem;
  height: 2.2rem;
  border: none;
  background: none;
  color: var(--fg);
  cursor: pointer;
  display: none;
}

.site-nav {
  display: none;
}

.site-nav a {
  text-decoration: none;
  color: var(--fg);
  font-weight: 600;
}

.site-nav a:hover {
  color: var(--accent);
}

.hero {
  padding: 4rem 1rem 2rem;
  text-align: center;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
}

.gallery-section,
.info-section {
  padding: 2rem 1rem;
}

.gallery-section h2,
.info-section h2 {
  margin-top: 0;
}

.gallery-layout {
  display: grid;
  grid-template-columns: minmax(220px, 260px) 1fr;
  gap: 2rem;
  align-items: start;
  margin-top: 1rem;
}

.gallery-sidebar {
  position: sticky;
  top: 1rem;
  align-self: start;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 1rem;
  min-width: 250px;
}

.gallery-controls,
.panel-menu {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.category-buttons,
.panel-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.panel-buttons {
  margin-top: 0.25rem;
}

.panel-btn,
.category-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--card);
  border: 2px solid transparent;
  color: var(--fg);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: all 0.2s ease;
  text-align: left;
}

.panel-btn:hover,
.category-btn:hover {
  border-color: var(--accent);
  background: rgba(229, 161, 15, 0.1);
  transform: translateY(-2px);
}

.panel-btn.active,
.category-btn.active {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

.gallery-frame {
  display: flex;
  flex-direction: column;
}

.panel-content {
  display: none;
  background: var(--card);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 10px 22px rgba(0,0,0,0.35);
}

.panel-content.active {
  display: block;
}

.panel-section {
  display: none;
}

.panel-section.active {
  display: block;
}

.panel-section h3 {
  margin-top: 0;
}

.panel-content ul {
  padding-left: 1.2rem;
  margin: 0.75rem 0 0;
}

@media (max-width: 860px) {
  .gallery-layout {
    grid-template-columns: 1fr;
  }

  .gallery-sidebar {
    position: static;
  }

  .category-buttons,
  .panel-buttons {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .panel-btn,
  .category-btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

.category-buttons .category-btn {
  width: 100%;
}

@media (max-width: 860px) {
  .gallery-layout {
    grid-template-columns: 1fr;
  }

  .gallery-sidebar {
    position: static;
  }

  .category-buttons {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

.category-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--card);
  border: 2px solid transparent;
  color: var(--fg);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.category-btn:hover {
  border-color: var(--accent);
  background: rgba(229, 161, 15, 0.1);
  transform: translateY(-2px);
}

.category-btn.active {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

.category-btn .icon {
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 25px;
  column-gap: 25px;
  row-gap: 25px;
}

.photo-card {
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 22px rgba(0,0,0,0.35);
  cursor: pointer;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.photo-card img {
  width: 100%;
  display: block;
  object-fit: contain;
  transition: transform .3s ease;
}

.gallery-grid.category-filtered .photo-card {
  max-width: 800px;
  max-height: 600px;
  margin: 0 auto;
}

.gallery-grid.category-filtered .photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.info-section p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  max-width: 55ch;
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 20;
}

.lightbox.show {
  display: flex;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  text-align: center;
}

.lightbox-content img {
  position: relative;
  max-width: 100%;
  max-height: 70vh;
  border-radius: 10px;
  z-index: 1;
}

.lightbox-meta {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--fg);
  font-size: 0.95rem;
  text-align: left;
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
}

.lightbox-meta .meta-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.lightbox-meta .meta-row:last-child {
  border-bottom: none;
}

.lightbox-meta .meta-label {
  font-weight: 700;
  color: var(--accent);
}

.lightbox-meta .meta-value {
  color: var(--fg);
}

.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 2rem;
  width: 2.4rem;
  height: 3.2rem;
  border-radius: 8px;
  cursor: pointer;
  z-index: 20;
  pointer-events: auto;
}

.prev-btn {
  left: 0.3rem;
}

.next-btn {
  right: 0.3rem;
}

.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 2rem;
  width: 2.4rem;
  height: 3.2rem;
  border-radius: 8px;
  cursor: pointer;
  z-index: 10;
}

.prev-btn {
  left: -3.2rem;
}

.next-btn {
  right: -3.2rem;
}

.close-btn {
  position: absolute;
  top: -0.6rem;
  right: -0.6rem;
  border: none;
  background: var(--bg);
  color: var(--fg);
  font-size: 1.6rem;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 50%;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .site-nav { position: absolute; top: 100%; right: 0; background: var(--bg); flex-direction: column; width: 220px; transform: translateY(-100%); transition: transform .2s ease; padding: 0.7rem; border-radius: 0 0 0 12px; box-shadow: 0 10px 20px rgba(0,0,0,0.3); }
  .site-nav.open { transform: translateY(0); }
  .site-nav a { padding: 0.4rem 0; }
  
  .category-btn {
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
  }
  
  .category-btn .icon {
    font-size: 1rem;
  }
}