:root {
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --panel-width: min(390px, 92vw);
  --accent: #ffc400;
  --glass: rgba(10, 17, 23, 0.78);
  --line: rgba(255, 255, 255, 0.14);
}

* { box-sizing: border-box; }
html, body, .app-shell, #panorama { width: 100%; height: 100%; margin: 0; }
body { overflow: hidden; background: #080d11; color: #fff; }
button, input { font: inherit; }

.app-shell { position: relative; isolation: isolate; }
#panorama { position: absolute; inset: 0; background: #080d11; }

.topbar {
  position: absolute;
  z-index: 8;
  top: max(16px, env(safe-area-inset-top));
  left: 18px;
  right: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: none;
}

.topbar::before {
  content: "";
  position: absolute;
  inset: -10px -12px;
  z-index: -1;
  border-radius: 18px;
  background: linear-gradient(90deg, rgba(5, 11, 16, .86), rgba(5, 11, 16, .36) 72%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.icon-button, .control-dock button {
  border: 1px solid var(--line);
  color: #fff;
  background: rgba(12, 21, 28, .76);
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.icon-button:hover, .control-dock button:hover { background: rgba(35, 47, 56, .9); border-color: rgba(255,255,255,.3); }
.icon-button:active, .control-dock button:active { transform: scale(.96); }
.icon-button { width: 44px; height: 44px; border-radius: 12px; font-size: 21px; pointer-events: auto; }
.brand-block { min-width: 0; }
.site-title { font-size: 15px; font-weight: 650; letter-spacing: .08em; color: rgba(255,255,255,.72); }
.scene-title { margin-top: 3px; font-size: clamp(18px, 2vw, 25px); font-weight: 750; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.scene-counter { margin-left: auto; padding: 8px 11px; border: 1px solid var(--line); border-radius: 999px; background: rgba(9,17,23,.64); font-variant-numeric: tabular-nums; pointer-events: auto; }

.scene-panel {
  position: absolute;
  z-index: 12;
  inset: 0 auto 0 0;
  width: var(--panel-width);
  padding: max(24px, env(safe-area-inset-top)) 18px max(20px, env(safe-area-inset-bottom));
  transform: translateX(-104%);
  transition: transform .28s cubic-bezier(.2,.8,.2,1);
  background: rgba(7, 13, 18, .94);
  box-shadow: 24px 0 70px rgba(0,0,0,.42);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  display: flex;
  flex-direction: column;
}
.scene-panel.open { transform: translateX(0); }
.panel-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 15px; }
.panel-header h1 { margin: 4px 0 0; font-size: 28px; }
.panel-kicker { color: var(--accent); font-size: 11px; letter-spacing: .18em; font-weight: 800; }
.close-button { flex: 0 0 auto; }

.search-box { margin: 22px 0 14px; display: grid; gap: 7px; color: rgba(255,255,255,.58); font-size: 12px; }
.search-box input { width: 100%; border: 1px solid var(--line); border-radius: 12px; outline: none; color: #fff; background: rgba(255,255,255,.07); padding: 12px 13px; }
.search-box input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255,196,0,.13); }

.scene-list { overflow: auto; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; padding: 2px 3px 18px 0; }
.scene-card { position: relative; min-height: 104px; padding: 0; border: 1px solid var(--line); border-radius: 13px; overflow: hidden; color: #fff; background: #172028; cursor: pointer; text-align: left; }
.scene-card img { width: 100%; height: 100%; min-height: 104px; object-fit: cover; display: block; transition: transform .25s ease, filter .25s ease; }
.scene-card:hover img { transform: scale(1.04); }
.scene-card span { position: absolute; inset: auto 0 0; padding: 26px 10px 9px; font-size: 13px; font-weight: 700; background: linear-gradient(transparent, rgba(0,0,0,.82)); }
.scene-card.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(255,196,0,.2); }
.scene-card.active::after { content: "当前"; position: absolute; top: 8px; right: 8px; padding: 3px 6px; border-radius: 999px; background: var(--accent); color: #141414; font-size: 10px; font-weight: 800; }

.panel-backdrop { display: none; position: absolute; z-index: 11; inset: 0; border: 0; background: rgba(0,0,0,.38); }
.panel-backdrop.open { display: block; }

.control-dock {
  position: absolute;
  z-index: 8;
  left: 50%;
  bottom: max(24px, calc(env(safe-area-inset-bottom) + 12px));
  transform: translateX(-50%);
  display: flex;
  gap: 7px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 12px 32px rgba(0,0,0,.28);
}
.control-dock button { min-width: 72px; height: 42px; padding: 0 10px; border-radius: 10px; font-weight: 650; }
.control-dock button.active { color: #171717; background: var(--accent); border-color: var(--accent); }
.control-dock button:disabled { opacity: .42; cursor: not-allowed; }
.usage-tip { position: absolute; z-index: 7; left: 50%; bottom: 88px; transform: translateX(-50%); padding: 7px 12px; border-radius: 999px; background: rgba(0,0,0,.48); color: rgba(255,255,255,.72); font-size: 12px; white-space: nowrap; pointer-events: none; animation: tip-fade 7s forwards; }

@keyframes tip-fade { 0%, 65% { opacity: 1; } 100% { opacity: 0; } }

@media (max-width: 720px) {
  .topbar { left: 10px; right: 10px; }
  .site-title { font-size: 11px; }
  .scene-title { font-size: 17px; }
  .scene-counter { font-size: 12px; }
  .control-dock { width: calc(100% - 18px); justify-content: space-between; bottom: max(10px, env(safe-area-inset-bottom)); }
  .control-dock button { min-width: 0; flex: 1; padding: 0 5px; font-size: 18px; }
  .control-dock button span { display: none; }
  .usage-tip { bottom: 70px; max-width: calc(100% - 30px); overflow: hidden; text-overflow: ellipsis; }
}

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