/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: #111;
  color: #eee;
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: #eee;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.6;
}

img {
  max-width: 100%;
  display: block;
}

/* Layout */
#canvasWrapper {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
#sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 240px;
  height: 100vh;
  background: #111;
  border-right: 1px solid #222;
  padding: 45px 30px;
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.main-nav ul {
  list-style: none;
}

.main-nav li {
  margin-bottom: 6px;
}

.main-nav a {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #aaa;
  display: block;
  padding: 4px 0;
}

.main-nav a:hover,
.main-nav a.active {
  color: #eee;
  opacity: 1;
}

.main-nav .folder {
  position: relative;
}

.main-nav .folder > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 6px;
  vertical-align: middle;
  border-left: 4px solid #666;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform 0.2s;
}

.main-nav .folder.open > a::after {
  transform: rotate(90deg);
}

.main-nav .folder ul {
  list-style: none;
  padding-left: 14px;
  margin-top: 4px;
  margin-bottom: 8px;
  display: none;
}

.main-nav .folder.open ul {
  display: block;
}

.main-nav .folder ul a {
  font-size: 0.75rem;
  color: #777;
  text-transform: none;
  letter-spacing: 0.03em;
}

.main-nav .folder ul a.active,
.main-nav .folder ul a:hover {
  color: #eee;
}

.social-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 20px;
  margin-bottom: 10px;
}

.social-links a {
  color: #888;
  transition: color 0.2s ease;
  line-height: 1;
  display: flex;
  align-items: center;
}

.social-links a:hover {
  color: #eee;
}

.social-icon {
  width: 22px;
  height: 22px;
  display: block;
  opacity: 0.55;
  transition: opacity 0.2s ease;
  align-self: center;
}

.social-links a:hover .social-icon {
  opacity: 1;
}

/* Main Content */
#main {
  margin-left: 240px;
  width: calc(100% - 240px);
  min-height: 100vh;
  padding: 45px;
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  cursor: pointer;
  background: #1a1a1a;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease, opacity 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.03);
  opacity: 0.85;
}

/* Lightbox */
#lightbox {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.96);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
}

#lightbox.active {
  display: flex;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 30px;
  font-size: 2rem;
  color: #eee;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5rem;
  color: #eee;
  cursor: pointer;
  background: none;
  border: none;
  padding: 20px;
  opacity: 0.5;
  transition: opacity 0.2s;
  line-height: 1;
}

.lightbox-prev:hover,
.lightbox-next:hover {
  opacity: 1;
}

.lightbox-prev {
  left: 10px;
}

.lightbox-next {
  right: 10px;
}

.lightbox-counter {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  color: #888;
  letter-spacing: 0.1em;
}

.lightbox-caption {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8rem;
  color: #bbb;
  text-align: center;
  max-width: 80vw;
}

/* Footer */
.site-footer {
  position: fixed;
  bottom: 24px;
  left: 30px;
  font-size: 0.65rem;
  color: #555;
  letter-spacing: 0.05em;
  z-index: 101;
  pointer-events: none;
}

/* Mobile */
#mobileNav {
  display: none;
}

.mobile-toggle {
  display: none;
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 200;
  background: #111;
  border: 1px solid #333;
  color: #eee;
  padding: 8px 14px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
}

@media (max-width: 800px) {
  #sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    width: 260px;
  }

  #sidebar.open {
    transform: translateX(0);
  }

  .mobile-toggle {
    display: block;
  }

  #main {
    margin-left: 0;
    width: 100%;
    padding: 70px 20px 40px;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 6px;
  }

  .site-footer {
    position: static;
    padding: 20px;
    text-align: center;
  }

}

/* Hide/show categories */
.gallery-item.hidden {
  display: none;
}