:root {
  color-scheme: dark;
  --cyan: #2ed1ff;
  --ink: #071118;
  --glass: rgba(5, 15, 22, 0.72);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--ink);
}

button, a { -webkit-tap-highlight-color: transparent; }

.viewer {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 32rem;
  overflow: hidden;
  isolation: isolate;
  background: #050c11;
}

#panorama {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  opacity: 0;
  transition: opacity .45s ease;
}

#panorama.ready { opacity: 1; }
#panorama .psv-container, #panorama .psv-canvas-container { width: 100%; height: 100%; }
#panorama canvas { cursor: grab; }
#panorama canvas:active { cursor: grabbing; }
#panorama .psv-navbar, #panorama .psv-loader-container { display: none !important; }

.viewer::before {
  content: "";
  position: absolute;
  z-index: 2;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(2, 8, 12, .72) 0%, transparent 24%, transparent 64%, rgba(2, 8, 12, .8) 100%),
    linear-gradient(90deg, rgba(3, 10, 15, .25), transparent 24%, transparent 76%, rgba(3, 10, 15, .25));
}

.topbar {
  position: absolute;
  z-index: 5;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 6.5rem;
  padding: 1.25rem clamp(1.25rem, 3vw, 3rem);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .9rem;
  width: max-content;
  color: white;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 2.8rem;
  height: 2.8rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .28);
}

.brand-mark b {
  display: grid;
  place-items: center;
  font-size: .82rem;
  letter-spacing: -.06em;
}

.brand-mark b:last-child { color: var(--ink); background: var(--cyan); }
.brand-copy { display: flex; flex-direction: column; align-items: flex-start; gap: .28rem; }
.brand-name { font-size: .88rem; letter-spacing: .21em; font-weight: 600; }
.brand-name strong { color: var(--cyan); font-weight: 800; }
.panorama-date {
  color: rgba(255,255,255,.72);
  font-size: .68rem;
  font-weight: 500;
  line-height: 1;
  letter-spacing: .12em;
}

.view-meta {
  display: flex;
  align-items: center;
  gap: .8rem;
  font-size: .76rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255,255,255,.74);
}

.view-meta span:first-child { color: white; font-weight: 700; }
.view-separator { width: 2.5rem; height: 1px; background: rgba(255,255,255,.35); }

.icon-button {
  justify-self: end;
  display: grid;
  place-items: center;
  width: 2.9rem;
  height: 2.9rem;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 50%;
  color: white;
  background: rgba(3,10,15,.36);
  backdrop-filter: blur(10px);
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}

.icon-button:hover { border-color: var(--cyan); background: rgba(3,10,15,.64); transform: scale(1.04); }
.icon-button svg { width: 1.15rem; fill: none; stroke: currentColor; stroke-width: 1.7; }

.center-hint {
  position: absolute;
  z-index: 4;
  top: 50%;
  left: 50%;
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .65rem .95rem;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 999px;
  background: rgba(3,10,15,.48);
  color: white;
  font-size: .78rem;
  letter-spacing: .06em;
  backdrop-filter: blur(12px);
  transform: translate(-50%, -50%);
  transition: opacity .35s ease, transform .35s ease;
  pointer-events: none;
}

.center-hint.hidden { opacity: 0; transform: translate(-50%, -35%); }
.mouse-icon { width: .85rem; height: 1.2rem; border: 1px solid white; border-radius: .5rem; position: relative; }
.mouse-icon::after { content: ""; position: absolute; top: .2rem; left: 50%; width: 2px; height: .25rem; background: var(--cyan); transform: translateX(-50%); }

.zoom-controls {
  position: absolute;
  z-index: 5;
  right: clamp(1.25rem, 3vw, 3rem);
  bottom: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 2.9rem;
  border: 1px solid rgba(255,255,255,.24);
  border-radius: 999px;
  background: rgba(3,10,15,.5);
  backdrop-filter: blur(12px);
}

.zoom-controls button {
  width: 2.7rem;
  height: 2.7rem;
  border: 0;
  color: white;
  background: transparent;
  font-size: 1.35rem;
  font-weight: 300;
  cursor: pointer;
}

.zoom-controls button:hover { color: var(--cyan); }
.zoom-controls span { width: 1.2rem; height: 1px; background: rgba(255,255,255,.22); }

.panorama-nav {
  position: absolute;
  z-index: 20;
  left: clamp(1.25rem, 3vw, 3rem);
  right: clamp(5.5rem, 9vw, 8rem);
  bottom: 2rem;
  display: flex;
  align-items: flex-end;
  gap: clamp(1.4rem, 3vw, 3rem);
  pointer-events: auto;
  isolation: isolate;
}

.nav-heading { min-width: 7.5rem; padding-bottom: .15rem; color: white; }
.nav-heading p { margin: 0 0 .6rem; font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; color: rgba(255,255,255,.62); }
.nav-heading span { font-size: .8rem; letter-spacing: .1em; color: rgba(255,255,255,.58); }
.nav-heading b { color: white; font-size: 1.45rem; font-weight: 500; }

.thumbs {
  display: flex;
  flex: 1;
  min-width: 0;
  align-items: center;
  gap: clamp(.55rem, 1vw, .9rem);
  overflow-x: auto;
  padding: .3rem .15rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(46,209,255,.6) transparent;
}
.thumb {
  position: relative;
  z-index: 1;
  width: clamp(5.2rem, 8vw, 8.2rem);
  aspect-ratio: 1.75;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: .2rem;
  background: #12202a;
  cursor: pointer;
  pointer-events: auto;
  touch-action: manipulation;
  opacity: .7;
  flex: 0 0 auto;
  transition: width .25s ease, opacity .25s ease, border-color .25s ease, transform .25s ease;
}

.thumb::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(0,0,0,.75)); }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb span { position: absolute; z-index: 1; left: .55rem; bottom: .4rem; color: white; font-size: .7rem; font-weight: 700; letter-spacing: .1em; }
.thumb:hover { opacity: 1; transform: translateY(-.2rem); }
.thumb.active { width: clamp(7rem, 11vw, 10.5rem); opacity: 1; border-color: var(--cyan); }
.thumb.active::before { content: ""; position: absolute; z-index: 2; top: 0; left: 0; right: 0; height: 2px; background: var(--cyan); }

.loading {
  position: absolute;
  z-index: 8;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 1rem;
  background: var(--ink);
  color: rgba(255,255,255,.7);
  font-size: .75rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  transition: opacity .35s ease, visibility .35s ease;
}

.loading.hidden { opacity: 0; visibility: hidden; }
.loading-mark { width: 2.2rem; height: 2.2rem; border: 2px solid rgba(255,255,255,.15); border-top-color: var(--cyan); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.edge-shade { position: absolute; z-index: 3; top: 28%; bottom: 25%; width: 5rem; pointer-events: none; opacity: .45; }
.edge-shade-left { left: 0; background: linear-gradient(90deg, rgba(0,0,0,.35), transparent); }
.edge-shade-right { right: 0; background: linear-gradient(-90deg, rgba(0,0,0,.35), transparent); }

button:focus-visible, a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

@media (max-width: 760px) {
  .viewer { min-height: 28rem; }
  .topbar { grid-template-columns: 1fr auto; min-height: 5rem; padding: 1rem; }
  .view-meta { display: none; }
  .brand-mark { width: 2.45rem; height: 2.45rem; }
  .brand-name { font-size: .75rem; }
  .panorama-date { font-size: .62rem; }
  .panorama-nav { left: 1rem; right: 1rem; bottom: max(1rem, env(safe-area-inset-bottom)); display: block; }
  .nav-heading { display: flex; align-items: baseline; justify-content: space-between; min-width: 0; padding: 0 .1rem .6rem; }
  .nav-heading p { margin: 0; }
  .nav-heading b { font-size: 1.1rem; }
  .thumbs { width: 100%; gap: .4rem; }
  .thumb, .thumb.active { width: calc((100% - 1.6rem) / 5); aspect-ratio: 1.15; }
  .thumb span { left: .35rem; bottom: .25rem; }
  .zoom-controls { right: 1rem; bottom: 8rem; }
  .center-hint { font-size: .7rem; white-space: nowrap; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}