/* ============================================================
   v6 Gallery Edition — Immersive Dark Gallery
   ============================================================ */
:root {
  --bg: #0c0606;
  --bg-grad: linear-gradient(135deg, #0a0810, #100808);
  --bg2: #140c0c;
  --bg2-grad: linear-gradient(135deg, #0c1020, #1a0e0e);
  --surface: #1e1010;
  --surface-grad: linear-gradient(135deg, #111830, #241414);
  --text: #e8d8d4;
  --text2: rgba(232,216,212,.55);
  --text3: rgba(232,216,212,.3);
  --gold: #00b4ff;
  --gold2: #e53935;
  --gold-grad: linear-gradient(135deg, #00b4ff, #e53935);
  --gold-glow: rgba(0,180,255,.2);
  --gold-glow2: rgba(229,57,53,.2);
  --border: rgba(0,180,255,.08);
  --serif: 'Noto Serif SC', serif;
  --sans: 'Noto Sans SC', sans-serif;
  --ease: cubic-bezier(.16,1,.3,1);
  --ease-out: cubic-bezier(.25,.46,.45,.94);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  background-image: var(--bg-grad);
  color: var(--text);
  line-height: 1.6;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.hidden { display: none !important; }

/* ============================================================
   LANDING SCREEN
   ============================================================ */
#landing {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
#landing.exit {
  opacity: 0;
  transform: scale(1.05);
  pointer-events: none;
}

.landing-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 50% 50%, rgba(0,180,255,.04), transparent),
    var(--bg);
  background-image:
    radial-gradient(ellipse 60% 40% at 50% 50%, rgba(0,180,255,.04), transparent),
    var(--bg-grad);
}

.landing-dust {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.landing-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: 700px;
  animation: landFade 1.2s var(--ease) both;
}

.logo-link {
  display: inline-block;
  text-decoration: none;
  border: none;
  outline: none;
  cursor: pointer;
}
.landing-logo {
  width: 100px;
  height: 100px;
  object-fit: contain;
  margin: 0 auto 24px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  box-shadow: 0 0 20px var(--gold-glow);
  animation: landFade 1.2s var(--ease) .2s both;
}

@keyframes landFade {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.landing-eyebrow {
  font-size: 10px;
  letter-spacing: .5em;
  color: var(--gold2);
  margin-bottom: 40px;
  text-transform: uppercase;
}

#landing h1 {
  font-family: var(--serif);
  font-size: clamp(32px, 7vw, 64px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: .02em;
  margin-bottom: 20px;
}

.gold {
  background: linear-gradient(135deg, var(--gold), var(--gold2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.landing-sub {
  font-size: 14px;
  color: var(--text2);
  font-style: italic;
  margin-bottom: 56px;
  letter-spacing: .05em;
}

.enter-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 48px;
  background: transparent;
  border: 1px solid var(--gold);
  border-radius: 2px;
  font-size: 13px;
  letter-spacing: .25em;
  color: var(--gold);
  font-weight: 500;
  transition: all .4s var(--ease);
  position: relative;
  overflow: hidden;
}
.enter-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gold-grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
  z-index: -1;
}
.enter-btn:hover::before { transform: scaleX(1); }
.enter-btn:hover { color: #fff; }
.enter-btn:hover .enter-arrow { transform: translateX(6px); }

.enter-arrow {
  display: inline-block;
  transition: transform .4s var(--ease);
  font-size: 16px;
}

.landing-stats {
  margin-top: 48px;
  display: flex;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  animation: statsIn .6s var(--ease) .6s forwards;
}
@keyframes statsIn {
  to { opacity: 1; }
}

.ls-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.ls-val {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--gold);
}
.ls-label {
  font-size: 10px;
  letter-spacing: .15em;
  color: var(--text3);
}

/* ============================================================
   GALLERY MAIN
   ============================================================ */
#gallery {
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0;
  transition: opacity .6s var(--ease) .3s;
}
#gallery.visible { opacity: 1; }

/* ---- Photo Stage ---- */
.photo-stage {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse 60% 40% at 50% 50%, rgba(0,180,255,.04), transparent),
    var(--bg-grad);
}

.photo-container {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.photo-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  /* Default opacity handled by JS inline styles for smooth transitions */
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease), filter 0.4s var(--ease);
  opacity: 1;
  transform: scale(1);
}
.photo-container img.loading {
  opacity: 0.25;
  filter: blur(10px);
}
.photo-container img.loaded {
  opacity: 1;
  filter: blur(0);
}
.photo-container img.prev {
  opacity: 0;
  transform: scale(.97);
}

/* ---- Photo Info Overlay ---- */
.photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 60px 80px 100px 80px;
  background: linear-gradient(0deg, rgba(0,0,0,.85) 0%, rgba(0,0,0,.4) 60%, transparent 100%);
  pointer-events: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s var(--ease) .2s, transform .5s var(--ease) .2s;
}
.photo-overlay.show {
  opacity: 1;
  transform: translateY(0);
}

.photo-route-badge {
  display: none;
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--gold);
  border: 1px solid rgba(0,180,255,.3);
  padding: 3px 12px;
  border-radius: 2px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.photo-title {
  font-family: var(--serif);
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  text-shadow: 0 2px 20px rgba(0,0,0,.5);
}

.photo-desc {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  max-width: 600px;
  line-height: 1.7;
}

/* ---- Nav Arrows ---- */
.nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.1);
  color: rgba(255,255,255,.6);
  transition: all .3s var(--ease);
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(0,0,0,.2);
}
.nav-arrow:hover {
  color: var(--gold);
  border-color: var(--gold);
  background: rgba(0,0,0,.4);
}
.nav-arrow svg { width: 20px; height: 20px; }
.nav-prev { left: 24px; }
.nav-next { right: 24px; }

/* ---- Progress Bar ---- */
.progress-bar {
  position: absolute;
  bottom: 72px;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(255,255,255,.05);
  z-index: 10;
}
.progress-fill {
  height: 100%;
  background: var(--gold-grad);
  transition: width .4s var(--ease);
  width: 0%;
}

/* ---- Slide Counter ---- */
.slide-counter {
  position: absolute;
  bottom: 80px;
  right: 80px;
  font-size: 11px;
  letter-spacing: .15em;
  color: var(--text3);
  z-index: 10;
  font-variant-numeric: tabular-nums;
}
#curSlide { color: var(--gold); font-weight: 500; }

/* ============================================================
   THUMBNAIL STRIP
   ============================================================ */
.thumb-strip {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(10,8,20,.6);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-top: 1px solid var(--border);
  z-index: 20;
  overflow: hidden;
}

.thumb-track {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 100%;
  padding: 8px 80px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.thumb-track::-webkit-scrollbar { display: none; }

.thumb-item {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 3px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  opacity: .35;
  transition: all .3s var(--ease);
  position: relative;
}
.thumb-item:hover { opacity: .6; }
.thumb-item.active {
  opacity: 1;
  border-color: var(--gold);
  box-shadow: 0 0 12px var(--gold-glow);
}
.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   TOP SEARCH BAR
   ============================================================ */
.top-search {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 1500;
  display: flex;
  align-items: center;
  gap: 6px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity .4s var(--ease), transform .4s var(--ease);
  pointer-events: none;
}
.top-search.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.top-search input {
  width: 220px;
  padding: 10px 14px;
  font-size: 14px;
  font-family: var(--sans);
  color: #fff;
  background: rgba(10,8,16,.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid rgba(0,180,255,.5);
  border-radius: 8px;
  outline: none;
  transition: all .3s var(--ease);
  box-shadow: 0 4px 20px rgba(0,0,0,.4);
}
.top-search input::placeholder {
  color: rgba(255,255,255,.45);
  font-size: 13px;
}
.top-search input:focus {
  background: rgba(0,180,255,.12);
  border-color: #00b4ff;
  box-shadow: 0 4px 24px rgba(0,180,255,.25);
  width: 260px;
}

.top-search button {
  width: 40px;
  height: 40px;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(0,180,255,.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid rgba(0,180,255,.5);
  transition: all .3s var(--ease);
  flex-shrink: 0;
}
.top-search button:hover {
  border-color: var(--gold);
  background: rgba(0,180,255,.1);
}

.top-search-msg {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  font-size: 11px;
  color: var(--gold2);
  background: rgba(10,8,16,.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid rgba(229,57,53,.3);
  white-space: nowrap;
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.top-search-msg.show {
  opacity: 1;
}
.top-search-msg.success {
  color: var(--gold);
  border-color: rgba(0,180,255,.3);
}

/* ============================================================
   DRAWER
   ============================================================ */
.drawer-toggle {
  position: absolute;
  top: 24px;
  left: 24px;
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  z-index: 200;
  border-radius: 50%;
  background: rgba(0,0,0,.3);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  transition: all .3s var(--ease);
}
.drawer-toggle:hover { border-color: var(--gold); }
.drawer-toggle span {
  display: block;
  width: 16px;
  height: 1px;
  background: var(--text2);
  transition: all .3s var(--ease);
}
.drawer-toggle:hover span { background: var(--gold); }

.drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 340px;
  max-width: 85vw;
  background: rgba(12,10,20,.97);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  z-index: 300;
  transform: translateX(-100%);
  transition: transform .4s var(--ease);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  border-right: 1px solid var(--border);
}
.drawer.open { transform: translateX(0); }

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 250;
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s var(--ease);
}
.drawer-overlay.show { opacity: 1; pointer-events: auto; }

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
  border-bottom: 1px solid var(--border);
}
.drawer-logo {
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: .2em;
  color: var(--gold);
}
.drawer-close {
  font-size: 24px;
  color: var(--text2);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all .3s;
}
.drawer-close:hover { color: var(--text); background: rgba(255,255,255,.05); }

.drawer-routes, .drawer-points {
  padding: 16px 0;
}

.drawer-section-title {
  font-size: 10px;
  letter-spacing: .3em;
  color: var(--text3);
  padding: 8px 24px 12px;
  text-transform: uppercase;
}

/* Route items in drawer */
.route-item {
  padding: 14px 24px;
  cursor: pointer;
  transition: all .3s var(--ease);
  border-left: 2px solid transparent;
}
.route-item:hover { background: rgba(0,180,255,.05); }
.route-item.active {
  background: rgba(0,180,255,.08);
  border-left-color: var(--gold);
}
.route-item-name {
  font-family: var(--serif);
  font-size: 14px;
  color: var(--text);
  margin-bottom: 4px;
}
.route-item-count {
  font-size: 11px;
  color: var(--text3);
  letter-spacing: .05em;
}

/* Point items in drawer */
.point-item {
  padding: 10px 24px;
  cursor: pointer;
  transition: all .3s var(--ease);
  display: flex;
  align-items: center;
  gap: 12px;
  border-left: 2px solid transparent;
}
.point-item:hover { background: rgba(255,255,255,.02); }
.point-item.active {
  background: rgba(0,180,255,.08);
  border-left-color: var(--gold);
}
.point-num {
  font-family: var(--serif);
  font-size: 11px;
  color: var(--text3);
  min-width: 28px;
  text-align: right;
}
.point-item.active .point-num { color: var(--gold); }
.point-item-title {
  font-size: 13px;
  color: var(--text2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.point-item.active .point-item-title { color: var(--text); }

/* ============================================================
   LOADER
   ============================================================ */
.loader {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: var(--bg);
  background-image: var(--bg-grad);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  transition: opacity .4s var(--ease);
}
.loader.done { opacity: 0; pointer-events: none; }

.loader-ring {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loader-text {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--text3);
}

/* ============================================================
   DUST PARTICLES
   ============================================================ */
.dust-p {
  position: absolute;
  width: 1px;
  height: 1px;
  background: rgba(0,180,255,.15);
  border-radius: 50%;
  pointer-events: none;
  animation: dustFloat linear infinite;
}
@keyframes dustFloat {
  0%   { opacity: 0; transform: translateY(0) translateX(0); }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { opacity: 0; transform: translateY(-100vh) translateX(20px); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .photo-overlay {
    padding: 40px 24px 100px 24px;
  }
  .nav-arrow {
    width: 40px;
    height: 40px;
  }
  .nav-prev { left: 12px; }
  .nav-next { right: 12px; }
  .nav-arrow svg { width: 16px; height: 16px; }
  .slide-counter {
    right: 20px;
    bottom: 78px;
  }
  .thumb-track { padding: 8px 20px; }
  .thumb-item { width: 44px; height: 44px; }
  .drawer { width: 300px; }
  .landing-content { padding: 0 20px; }
  .enter-btn { padding: 14px 36px; }
  .landing-stats { gap: 20px; }
  .ls-val { font-size: 22px; }
  .landing-logo { width: 80px; height: 80px; }
  .top-search { top: 24px; right: 12px; }
  .top-search input { width: 160px; font-size: 14px; }
  .top-search input:focus { width: 180px; }
  .top-search button { width: 32px; height: 32px; font-size: 14px; }
}

@media (max-width: 480px) {
  .photo-overlay {
    padding: 30px 16px 90px 16px;
  }
  .photo-title { font-size: 18px; }
  .photo-desc { font-size: 12px; }
  .nav-prev { left: 8px; }
  .nav-next { right: 8px; }
  .slide-counter {
    right: 14px;
    bottom: 74px;
    font-size: 10px;
  }
  .thumb-strip { height: 64px; }
  .thumb-track { padding: 6px 14px; gap: 4px; }
  .thumb-item { width: 38px; height: 38px; }
  .drawer { width: 100vw; max-width: 100vw; }
  #landing h1 { font-size: clamp(28px, 9vw, 48px); }
  .landing-logo { width: 64px; height: 64px; }
  .top-search { top: 24px; right: 10px; }
  .top-search input { width: 140px; font-size: 13px; padding: 6px 10px; }
  .top-search input:focus { width: 160px; }
  .top-search button { width: 30px; height: 30px; font-size: 13px; }
}