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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a25;
  --bg-glass: rgba(18, 18, 26, 0.75);
  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #606078;
  --accent: #6c8cff;
  --accent-glow: rgba(108, 140, 255, 0.3);
  --accent-soft: rgba(108, 140, 255, 0.1);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 64px rgba(0,0,0,0.5);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ========== Ambient Background ========== */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse 600px 400px at 20% 20%, rgba(108, 140, 255, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 500px 500px at 80% 80%, rgba(160, 100, 255, 0.04) 0%, transparent 70%),
    radial-gradient(ellipse 400px 300px at 60% 30%, rgba(100, 200, 255, 0.03) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: ambientShift 20s ease-in-out infinite alternate;
}

@keyframes ambientShift {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-30px, -20px) rotate(2deg); }
}

/* ========== Navbar ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.92);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.navbar-brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-primary) !important;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: opacity var(--transition-fast);
}

.navbar-brand:hover { opacity: 0.8; }

.navbar-brand::before {
  content: '';
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent), #a064ff);
  border-radius: 8px;
  display: inline-block;
  position: relative;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

/* ========== Dropdown ========== */
.dropdown { position: relative; }

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: none;
  font-family: inherit;
}

.dropdown-toggle:hover {
  color: var(--text-primary);
  background: var(--accent-soft);
}

.dropdown-toggle .caret {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform var(--transition-fast);
  display: inline-block;
}

.dropdown.open .dropdown-toggle .caret {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  min-width: 160px;
  max-height: 320px;
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 6px;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-smooth);
  z-index: 1001;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.dropdown-menu::-webkit-scrollbar { width: 4px; }
.dropdown-menu::-webkit-scrollbar-track { background: transparent; }
.dropdown-menu::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 8px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
  color: var(--text-primary);
  background: var(--accent-soft);
}

/* ========== Search ========== */
.search-area {
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-input {
  width: 200px;
  padding: 8px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  transition: all var(--transition-fast);
}

.search-input::placeholder { color: var(--text-muted); }
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: rgba(255,255,255,0.08);
}

.btn-search {
  padding: 8px 18px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-search:hover {
  background: #5a7aee;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

/* ========== Mobile Menu Toggle ========== */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ========== Main Content ========== */
.main-content {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 90px 24px 100px;
}

/* ========== Page Header ========== */
.page-header {
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.page-header h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header .badge {
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 20px;
  letter-spacing: 0.5px;
}

/* ========== Gallery Grid ========== */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

/* ========== Picture Card ========== */
.pic-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--transition-smooth);
  cursor: pointer;
  opacity: 0;
  transform: translateY(30px);
}

.pic-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.pic-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.pic-card .img-wrap {
  position: relative;
  width: 100%;
  padding-top: 62.5%;
  overflow: hidden;
  background: var(--bg-secondary);
}

.pic-card .img-wrap img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pic-card:hover .img-wrap img {
  transform: scale(1.08);
}

/* Overlay */
.pic-card .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  display: flex;
  align-items: flex-end;
  padding: 20px;
}

.pic-card:hover .overlay { opacity: 1; }

.overlay .view-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-spring);
}

.pic-card:hover .overlay .view-icon {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.view-icon svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Caption */
.pic-card .caption {
  padding: 14px 16px;
}

.pic-card .caption p {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

.pic-card:hover .caption p {
  color: var(--text-primary);
}

/* ========== Lightbox ========== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(30px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-smooth);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: scale(0.9);
  transition: transform var(--transition-spring);
}

.lightbox.active .lightbox-content {
  transform: scale(1);
}

.lightbox-content img {
  max-width: 90vw;
  max-height: 78vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.lightbox-caption {
  margin-top: 16px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 600px;
  line-height: 1.6;
}

.lightbox-close {
  position: absolute;
  top: -48px;
  right: 0;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
  font-size: 20px;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
  transform: rotate(90deg);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
  font-size: 20px;
  transition: all var(--transition-fast);
}

.lightbox-nav:hover {
  background: rgba(255,255,255,0.18);
}

.lightbox-prev { left: -80px; }
.lightbox-next { right: -80px; }

.lightbox-counter {
  position: absolute;
  top: -48px;
  left: 0;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
}

/* ========== Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all var(--transition-smooth);
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(108, 140, 255, 0.3);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

/* ========== Footer ========== */
.site-footer {
  position: relative;
  z-index: 1;
  padding: 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--bg-glass);
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-time {
  color: var(--text-muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  transition: color var(--transition-fast);
}

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

/* ========== Loading Skeleton ========== */
.skeleton {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--bg-secondary) 25%, rgba(255,255,255,0.03) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .navbar { padding: 0 16px; }
  
  .menu-toggle { display: flex; }
  
  .nav-right {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    flex-direction: column;
    gap: 12px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-smooth);
  }

  .nav-right.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links {
    flex-direction: column;
    width: 100%;
  }

  .nav-links .dropdown { width: 100%; }
  .nav-links .dropdown-toggle { width: 100%; justify-content: center; }

  .search-area {
    width: 100%;
    flex-wrap: wrap;
  }

  .search-input { flex: 1; min-width: 140px; }

  .gallery {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
  }

  .main-content { padding: 78px 12px 80px; }

  .page-header h1 { font-size: 22px; }

  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
  .lightbox-nav { width: 40px; height: 40px; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}

@media (max-width: 480px) {
  .gallery {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

/* ========== Scroll Progress ========== */
.scroll-progress {
  position: fixed;
  top: 64px;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), #a064ff);
  z-index: 1001;
  transition: width 0.1s linear;
  box-shadow: 0 0 8px var(--accent-glow);
}