:root { color-scheme: dark; font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; }
* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; }
body { background: #121b22; color: #fff; }
button { font: inherit; }
button:focus-visible { outline: 2px solid #f7d9a0; outline-offset: 3px; }
.viewer { position: relative; width: 100%; height: 100%; height: 100dvh; min-height: 300px; overflow: hidden; isolation: isolate; background: radial-gradient(circle at 50% 45%, #253746, #121b22 80%); }
#panorama { display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; }
#panorama.is-dragging { cursor: grabbing; }
.vignette { position: absolute; inset: 0; z-index: 1; pointer-events: none; background: linear-gradient(180deg, rgba(9,19,27,.58), transparent 30%, transparent 64%, rgba(9,19,27,.57)), linear-gradient(90deg, rgba(9,19,27,.18), transparent 35%, transparent 70%, rgba(9,19,27,.12)); }
.interface { position: absolute; z-index: 2; transition: opacity .24s ease, transform .24s ease; }
.masthead { top: 0; left: 0; right: 0; display: flex; align-items: flex-start; gap: 19px; padding: max(34px, env(safe-area-inset-top)) max(34px, env(safe-area-inset-right)) 0 max(34px, env(safe-area-inset-left)); }
.masthead__rule { width: 3px; height: 51px; flex: none; margin-top: 1px; background: #d2a968; border-radius: 3px; box-shadow: 0 0 18px rgba(210,169,104,.25); }
.eyebrow { margin: 1px 0 5px; color: #ebd3af; font-size: 11px; line-height: 1.4; letter-spacing: .2em; font-weight: 500; }
h1 { margin: 0; font-size: clamp(24px, 2.4vw, 36px); font-weight: 560; letter-spacing: .1em; line-height: 1.25; text-shadow: 0 2px 16px rgba(0,0,0,.2); }
.scene-name { margin: 14px 0 0 auto; padding: 7px 13px; border: 1px solid rgba(255,255,255,.38); border-radius: 999px; background: rgba(13,26,34,.22); backdrop-filter: blur(14px); font-size: 12px; letter-spacing: .12em; white-space: nowrap; }
.bottom-interface { left: max(34px, env(safe-area-inset-left)); right: max(34px, env(safe-area-inset-right)); bottom: max(36px, env(safe-area-inset-bottom)); display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.scene-picker { display: flex; align-items: flex-end; gap: 12px; }
.scene-option { display: flex; align-items: center; gap: 11px; min-width: 145px; padding: 6px 13px 6px 6px; color: rgba(255,255,255,.8); border: 1px solid rgba(255,255,255,.2); border-radius: 9px; background: rgba(9,22,30,.46); box-shadow: 0 5px 28px rgba(0,0,0,.12); backdrop-filter: blur(16px); cursor: pointer; text-align: left; transition: background .2s, border-color .2s, color .2s, transform .2s; }
.scene-option:hover { transform: translateY(-2px); background: rgba(9,22,30,.7); }
.scene-option[aria-pressed="true"] { color: #fff; border-color: rgba(226,189,129,.86); background: rgba(9,22,30,.72); }
.scene-option img { width: 63px; height: 42px; object-fit: cover; object-position: 50% 52%; border-radius: 5px; background: linear-gradient(145deg, #627c88, #233b47); }
.scene-option span { font-size: 13px; font-weight: 530; letter-spacing: .05em; white-space: nowrap; }
.viewer-actions { display: flex; flex-direction: column; align-items: flex-end; gap: 13px; }
.gesture-hint { margin: 0 2px; color: rgba(255,255,255,.78); font-size: 11px; letter-spacing: .09em; text-shadow: 0 1px 10px rgba(0,0,0,.48); white-space: nowrap; }
.gesture-hint span { padding: 0 3px; color: #d5ae72; }
.control-group { display: flex; align-items: center; gap: 2px; padding: 5px; border: 1px solid rgba(255,255,255,.22); border-radius: 10px; background: rgba(9,22,30,.57); box-shadow: 0 5px 28px rgba(0,0,0,.15); backdrop-filter: blur(16px); }
.control-group button { width: 38px; height: 36px; padding: 0; color: #fff; border: 0; border-radius: 6px; background: transparent; cursor: pointer; font-size: 22px; font-weight: 300; line-height: 1; transition: background .15s; }
.control-group button:hover { background: rgba(255,255,255,.15); }
.control-divider { width: 1px; height: 21px; margin: 0 4px; background: rgba(255,255,255,.19); }
.provenance { right: max(36px, env(safe-area-inset-right)); bottom: 14px; margin: 0; color: rgba(255,255,255,.59); font-size: 10px; letter-spacing: .14em; text-shadow: 0 1px 9px rgba(0,0,0,.5); }
.center-status { position: absolute; top: 50%; left: 50%; z-index: 4; transform: translate(-50%, -50%); display: flex; align-items: center; gap: 11px; max-width: min(84vw, 500px); padding: 13px 17px; border: 1px solid rgba(255,255,255,.19); border-radius: 10px; background: rgba(10,24,32,.8); box-shadow: 0 14px 46px rgba(0,0,0,.24); backdrop-filter: blur(18px); color: #fff; font-size: 13px; letter-spacing: .06em; line-height: 1.5; text-align: center; }
.center-status[hidden], .retry-button[hidden], .restore-interface[hidden] { display: none; }
.center-status__spinner { flex: none; width: 15px; height: 15px; border: 2px solid rgba(255,255,255,.32); border-top-color: #e8bd7b; border-radius: 50%; animation: spin .8s linear infinite; }
.center-status__spinner[hidden] { display: none; }
.retry-button { flex: none; padding: 5px 9px; border: 1px solid rgba(255,255,255,.35); border-radius: 5px; background: rgba(255,255,255,.12); color: #fff; cursor: pointer; font-size: 12px; }
.restore-interface { position: absolute; z-index: 5; top: max(22px, env(safe-area-inset-top)); right: max(22px, env(safe-area-inset-right)); padding: 9px 12px; border: 1px solid rgba(255,255,255,.25); border-radius: 7px; background: rgba(9,22,30,.49); backdrop-filter: blur(12px); color: #fff; font-size: 11px; letter-spacing: .08em; cursor: pointer; }
.viewer.ui-hidden .interface { opacity: 0; transform: translateY(8px); pointer-events: none; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 720px) {
  .masthead { gap: 12px; padding: max(22px, env(safe-area-inset-top)) 20px 0; }
  .masthead__rule { height: 43px; }
  .eyebrow { font-size: 10px; }
  h1 { font-size: 24px; }
  .scene-name { margin-top: 7px; font-size: 10px; }
  .bottom-interface { left: 17px; right: 17px; bottom: max(30px, env(safe-area-inset-bottom)); flex-direction: column; align-items: stretch; gap: 14px; }
  .scene-picker { order: 2; }
  .scene-option { flex: 1; min-width: 0; }
  .scene-option img { width: 53px; height: 37px; }
  .viewer-actions { align-items: flex-end; }
  .gesture-hint { font-size: 10px; }
  .provenance { right: 18px; bottom: 8px; font-size: 9px; }
}
@media (max-width: 390px) { .scene-option { gap: 6px; padding-right: 6px; } .scene-option span { font-size: 11px; } .scene-name { display: none; } }
@media (prefers-reduced-motion: reduce) { .interface, .scene-option, .control-group button { transition: none; } .center-status__spinner { animation-duration: 1.5s; } }