:root {
  color-scheme: dark;
  --bg: #04131d;
  --surface: #071c28;
  --surface-strong: #0a2533;
  --line: rgba(203, 233, 241, 0.18);
  --line-strong: rgba(139, 220, 255, 0.46);
  --ink: #eef8fa;
  --muted: #9fb5bd;
  --blue: #2aaee2;
  --blue-pale: #8bdcff;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body { overflow: hidden; background: var(--bg); color: var(--ink); font-family: var(--font); }
button, a { font: inherit; }

.collection-shell { min-height: 100svh; background: var(--bg); }
.collection-header {
  display: grid;
  grid-template-columns: 260px 1fr auto;
  align-items: center;
  min-height: 62px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: #061925;
}

.collection-brand {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
}
.collection-brand::before {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 10px;
  border: 2px solid var(--blue);
  content: "";
  transform: rotate(45deg);
}
.collection-brand:focus-visible, .model-option:focus-visible, .open-model:focus-visible {
  outline: 2px solid var(--blue-pale);
  outline-offset: 4px;
}
.collection-header p, .collection-count, .switcher-label, .viewer-eyebrow {
  margin: 0;
  color: var(--blue-pale);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.collection-header p { color: var(--muted); }
.collection-header p span { padding: 0 8px; color: var(--blue); }

.collection-workspace {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  height: calc(100svh - 62px);
}
.model-switcher {
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-right: 1px solid var(--line);
  background: var(--surface);
}
.switcher-label { padding: 24px 22px 14px; }
.model-option {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  width: 100%;
  min-height: 116px;
  padding: 19px 22px;
  border: 0;
  border-top: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease;
}
.model-option:last-of-type { border-bottom: 1px solid var(--line); }
.model-option::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--blue);
  content: "";
  opacity: 0;
}
.model-option:hover { background: rgba(42, 174, 226, 0.06); }
.model-option.is-active { background: var(--surface-strong); }
.model-option.is-active::before { opacity: 1; }
.model-index { color: var(--blue-pale); font-family: var(--mono); font-size: 10px; }
.model-copy { display: grid; gap: 7px; min-width: 0; }
.model-copy strong { font-size: 14px; line-height: 1.25; letter-spacing: 0; }
.model-copy small { color: var(--muted); font-size: 11px; line-height: 1.45; }
.model-status {
  grid-column: 2;
  width: max-content;
  padding: 4px 7px;
  border: 1px solid rgba(139, 220, 255, 0.25);
  color: var(--blue-pale);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.switcher-note { margin-top: auto; padding: 20px 22px 24px; }
.switcher-note span { color: var(--blue-pale); font-family: var(--mono); font-size: 9px; letter-spacing: 0.08em; text-transform: uppercase; }
.switcher-note p { margin: 9px 0 0; color: var(--muted); font-size: 11px; line-height: 1.5; }

.model-viewer { display: grid; min-width: 0; grid-template-rows: 70px minmax(0, 1fr); background: var(--bg); }
.viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-width: 0;
  padding: 0 22px;
  border-bottom: 1px solid var(--line);
  background: #061925;
}
.viewer-toolbar > div { min-width: 0; }
.viewer-toolbar h1 { overflow: hidden; margin: 5px 0 0; font-size: 19px; line-height: 1.1; letter-spacing: 0; text-overflow: ellipsis; white-space: nowrap; }
.open-model {
  flex: 0 0 auto;
  min-height: 34px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-size: 11px;
  text-decoration: none;
}
.open-model:hover { border-color: var(--blue-pale); background: var(--blue); color: #00131d; }
.viewer-frame { position: relative; min-width: 0; min-height: 0; overflow: hidden; background: #061a26; }
#model-frame { display: block; width: 100%; height: 100%; border: 0; background: #061a26; }
.frame-loader {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 13px;
  background: #061a26;
  color: var(--blue-pale);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-align: center;
  text-transform: uppercase;
  transition: opacity 220ms ease, visibility 220ms ease;
}
.frame-loader.is-hidden { visibility: hidden; opacity: 0; }
.frame-loader__mark { width: 30px; height: 30px; margin: 0 auto; border: 2px solid rgba(139, 220, 255, 0.2); border-top-color: var(--blue-pale); border-radius: 50%; animation: collection-spin 850ms linear infinite; }
@keyframes collection-spin { to { transform: rotate(360deg); } }

@media (max-width: 820px) {
  body { overflow: auto; }
  .collection-header { grid-template-columns: 1fr auto; min-height: 54px; padding: 0 14px; }
  .collection-header p { display: none; }
  .collection-workspace { grid-template-columns: 1fr; grid-template-rows: 88px minmax(0, 1fr); height: calc(100svh - 54px); }
  .model-switcher { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-right: 0; border-bottom: 1px solid var(--line); }
  .switcher-label, .switcher-note { display: none; }
  .model-option { grid-template-columns: 20px minmax(0, 1fr); gap: 5px; min-height: 87px; padding: 13px 9px 11px; border-top: 0; border-right: 1px solid var(--line); }
  .model-option:last-of-type { border-right: 0; border-bottom: 0; }
  .model-option::before { inset: auto 0 0; width: auto; height: 3px; }
  .model-copy { gap: 4px; }
  .model-copy strong { font-size: 11px; line-height: 1.2; }
  .model-copy small { display: none; }
  .model-status { grid-column: 2; padding: 2px 5px; font-size: 7px; }
  .model-viewer { grid-template-rows: 58px minmax(0, 1fr); }
  .viewer-toolbar { padding: 0 12px; }
  .viewer-toolbar h1 { font-size: 15px; }
  .viewer-eyebrow { font-size: 8px; }
  .open-model { min-height: 32px; padding: 7px 9px; font-size: 10px; }
}

@media (max-width: 430px) {
  .collection-brand { font-size: 13px; }
  .model-option { grid-template-columns: 16px minmax(0, 1fr); padding-inline: 7px; }
  .model-index { font-size: 8px; }
  .model-copy strong { font-size: 10px; }
  .model-status { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}