:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07100e;
  color: #eef7f0;
}

* { box-sizing: border-box; }

html,
body,
#viewer {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background:
    radial-gradient(circle at 50% 42%, rgba(30, 78, 56, .32), transparent 45%),
    #07100e;
}

#viewer {
  position: relative;
  isolation: isolate;
}

#viewer::after {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  content: "";
  background: radial-gradient(circle, transparent 44%, rgba(0, 5, 4, .42) 100%);
}

#scene {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  outline: none;
}

.masthead {
  position: absolute;
  z-index: 4;
  top: max(28px, env(safe-area-inset-top));
  left: max(32px, env(safe-area-inset-left));
  right: max(32px, env(safe-area-inset-right));
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  pointer-events: none;
}

.eyebrow,
.spec-card__label {
  margin: 0 0 8px;
  color: #b99b5f;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .22em;
}

h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(25px, 3vw, 42px);
  font-weight: 500;
  letter-spacing: -.03em;
}

.subtitle {
  margin: 7px 0 0;
  color: rgba(232, 241, 234, .56);
  font-size: 12px;
  letter-spacing: .08em;
}

.status {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 4px;
  padding: 8px 11px;
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 999px;
  background: rgba(8, 19, 16, .62);
  color: rgba(235, 245, 237, .72);
  font-size: 11px;
  backdrop-filter: blur(14px);
}

.status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #d5b771;
  box-shadow: 0 0 12px #d5b771;
}

.status.is-ready .status__dot { background: #6fe59a; box-shadow: 0 0 12px #6fe59a; }
.status.is-error .status__dot { background: #ef766f; box-shadow: 0 0 12px #ef766f; }

.spec-card {
  position: absolute;
  z-index: 4;
  left: max(32px, env(safe-area-inset-left));
  bottom: max(34px, env(safe-area-inset-bottom));
  width: min(260px, calc(100vw - 64px));
  padding: 17px 18px 13px;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 14px;
  background: rgba(8, 18, 15, .58);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .18);
  pointer-events: none;
  backdrop-filter: blur(16px);
}

.spec-card dl { margin: 0; }
.spec-card dl div {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-top: 1px solid rgba(255, 255, 255, .055);
  font-size: 11px;
}
.spec-card dt { color: rgba(232, 241, 234, .42); }
.spec-card dd { margin: 0; color: rgba(244, 249, 245, .82); }

.toolbar {
  position: absolute;
  z-index: 5;
  left: 50%;
  bottom: max(34px, env(safe-area-inset-bottom));
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 5px;
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 13px;
  background: rgba(8, 18, 15, .72);
  box-shadow: 0 16px 45px rgba(0, 0, 0, .25);
  transform: translateX(-50%);
  backdrop-filter: blur(18px);
}

.toolbar button {
  min-width: 54px;
  padding: 9px 12px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: rgba(234, 242, 235, .62);
  font: inherit;
  font-size: 11px;
  cursor: pointer;
  transition: background .18s ease, color .18s ease;
}

.shadow-toggle { display: flex; align-items: center; gap: 5px; flex: 0 0 auto; font-size: 11px; white-space: nowrap; padding: 0 8px; }
.shadow-toggle input { accent-color: #d1b36c; }
@media (min-width: 801px) and (max-width: 1400px) {
  .spec-card, .hint { display: none; }
}

.toolbar button:hover,
.toolbar button:focus-visible {
  background: rgba(255, 255, 255, .07);
  color: #fff;
  outline: none;
}

.toolbar button.is-active,
.toolbar button[aria-pressed="true"] {
  background: #d1b36c;
  color: #122018;
}

.toolbar__divider {
  width: 1px;
  height: 22px;
  margin: 0 3px;
  background: rgba(255, 255, 255, .1);
}

.hint {
  position: absolute;
  z-index: 4;
  right: max(32px, env(safe-area-inset-right));
  bottom: max(41px, calc(env(safe-area-inset-bottom) + 7px));
  display: flex;
  align-items: center;
  gap: 9px;
  color: rgba(232, 241, 234, .38);
  font-size: 10px;
  pointer-events: none;
}

.hint i {
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: currentColor;
}

.loading {
  position: absolute;
  z-index: 6;
  left: 50%;
  bottom: 18%;
  width: min(250px, 45vw);
  transform: translateX(-50%);
  transition: opacity .35s ease;
}

.loading.is-hidden { opacity: 0; }
.loading__track { height: 2px; overflow: hidden; background: rgba(255, 255, 255, .1); }
.loading__track span {
  display: block;
  width: 6%;
  height: 100%;
  background: #d1b36c;
  box-shadow: 0 0 10px rgba(209, 179, 108, .8);
  transition: width .2s ease;
}

@media (max-width: 800px) {
  .masthead { top: 18px; left: 18px; right: 18px; }
  .status { display: none; }
  .spec-card { display: none; }
  .hint { display: none; }
  .toolbar {
    bottom: max(16px, env(safe-area-inset-bottom));
    width: calc(100vw - 24px);
    overflow-x: auto;
    justify-content: flex-start;
  }
  .toolbar button { flex: 0 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  .toolbar button,
  .loading { transition: none; }
}

/* Keep layout measurable for camera fitting while hiding all startup UI. */
#viewer.is-loading > :not(#loading) { visibility: hidden !important; pointer-events: none !important; }
#viewer.is-loading::after { display: none; }
#loading.loading { position: fixed; inset: 0; z-index: 100; width: 100%; height: 100%; transform: none; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 28px; background: #07100e; opacity: 1; transition: none; }
#loading h1 { margin: 0; color: #eef7f0; font: 500 clamp(24px, 4vw, 34px)/1.3 system-ui, sans-serif; letter-spacing: .06em; }
#loading .loading__track { width: min(300px, calc(100vw - 80px)); height: 4px; border-radius: 4px; overflow: hidden; background: #263c30; }
#loading-bar { display: block; width: 0; height: 100%; background: #b8cebc; transition: width .15s linear; }

body:has(#viewer.is-loading) > :not(#viewer) { visibility: hidden !important; }