@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-primary: #0b0f17;
  --bg-secondary: #111827;
  --bg-card: #151d2e;
  --bg-card-hover: #1c263c;
  --border-color: #1e293b;
  --border-color-hover: #3b82f6;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.25);
  --badge-bg: #1e293b;
  --badge-text: #93c5fd;
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
}

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

/* Layout container */
.container {
  display: flex;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0;
}

/* Sidebar */
.sidebar-wrapper {
  width: 280px;
  min-width: 280px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  padding: 2rem 1.5rem;
  overflow-y: auto;
}

.sidebar-header {
  margin-bottom: 2rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.brand-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  padding: 2px;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.25;
  margin: 0;
}

.brand-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--badge-text);
  background: var(--badge-bg);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  margin-top: 0.25rem;
}

.nav-section {
  margin-top: 1.5rem;
  flex-grow: 1;
}

.nav-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  padding-left: 0.5rem;
}

.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.nav-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.nav-item a:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
  transform: translateX(4px);
}

.nav-item.active a {
  background-color: var(--bg-card);
  color: var(--accent-hover);
  border-color: var(--border-color);
  font-weight: 600;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.sidebar-footer a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Main Content Area */
.main-content {
  margin-left: 280px;
  flex-grow: 1;
  padding: 2.5rem 3rem;
  max-width: calc(100% - 280px);
  min-height: 100vh;
}

/* Breadcrumbs & Header */
.gallery-header {
  margin-bottom: 2rem;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.breadcrumb-nav a {
  color: var(--text-muted);
}

.breadcrumb-nav a:hover {
  color: var(--text-primary);
}

.breadcrumb-separator {
  color: var(--text-muted);
  opacity: 0.5;
}

.breadcrumb-current {
  color: var(--accent-hover);
  font-weight: 600;
}

.page-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
}

.page-description {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 800px;
  margin-top: 0.5rem;
  background: var(--bg-secondary);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.page-description p:first-child {
  margin-top: 0;
}

.page-description p:last-child {
  margin-bottom: 0;
}

.album-stats {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Responsive Grid for Albums and Photos */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

/* Album Card */
.album-card {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.album-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
  box-shadow: 0 12px 30px -10px var(--accent-glow);
}

.album-thumb-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--bg-secondary);
}

.album-thumb-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.album-card:hover .album-thumb-wrapper img {
  transform: scale(1.05);
}

.album-card-info {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  background-color: var(--bg-card);
}

.album-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.01em;
}

.album-card-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Photo Thumbnail Item */
.photo-item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  aspect-ratio: 4 / 3;
}

.photo-item:hover {
  transform: translateY(-3px) scale(1.01);
  border-color: var(--accent);
  box-shadow: 0 8px 25px -6px var(--accent-glow);
}

.photo-item a {
  display: block;
  width: 100%;
  height: 100%;
}

.photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.photo-item:hover img {
  transform: scale(1.06);
}

/* Mobile & Tablet Responsive */
@media (max-width: 900px) {
  .container {
    flex-direction: column;
  }

  .sidebar-wrapper {
    position: relative;
    width: 100%;
    min-width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
  }

  .sidebar-header {
    margin-bottom: 1rem;
  }

  .nav-section {
    margin-top: 1rem;
  }

  .nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .nav-item a {
    padding: 0.45rem 0.75rem;
    font-size: 0.85rem;
  }

  .sidebar-footer {
    display: none;
  }

  .main-content {
    margin-left: 0;
    max-width: 100%;
    padding: 1.75rem 1.25rem;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
  }

  .page-title {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}