/* 3D model gallery and viewer */
.mcards { list-style: none; margin: var(--space-5) 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: var(--space-5); }
.mcard { display: grid; gap: var(--space-2); align-content: start; height: 100%; padding-bottom: var(--space-4); border: 1px solid var(--color-border); border-radius: 10px; overflow: hidden; color: inherit; text-decoration: none; transition: border-color var(--dur) var(--ease); }
.mcard:hover, .mcard:focus-visible { border-color: var(--color-accent); }
.mthumb { position: relative; display: block; aspect-ratio: 4 / 3; overflow: hidden; background: var(--color-surface-hover); }
.mthumb img, .mthumb .mph { position: absolute; inset: 0; }
.mpreview { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: 0; transition: opacity .4s var(--ease); background: #14181d; }
.mcard.has-preview .mpreview { opacity: 1; }
.mopen { position: absolute; right: var(--space-3); bottom: var(--space-3); padding: 2px var(--space-3); border-radius: 999px; font-size: var(--text-sm); background: rgba(16, 19, 23, .85); color: #dfe5ec; border: 1px solid rgba(255, 255, 255, .22); opacity: 0; transform: translateY(4px); transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease); }
.mcard:hover .mopen, .mcard:focus-visible .mopen { opacity: 1; transform: none; }
@media (hover: none) { .mopen { opacity: 1; transform: none; } }
.mcard img, .mcard .mph { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; display: grid; place-items: center; font-size: 3rem; color: var(--color-text-secondary); background: var(--color-surface-hover); }
.mcard strong, .mcard .muted, .mcard .meta { padding: 0 var(--space-4); }
.tag { display: inline-block; font-size: var(--text-sm); padding: 0 var(--space-2); border: 1px solid var(--color-border); border-radius: 999px; color: var(--color-text-secondary); font-weight: 400; vertical-align: middle; }

.mv { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: var(--space-5); align-items: start; margin-bottom: var(--space-6); }
.mv-stage { position: relative; aspect-ratio: 4 / 3; min-height: 360px; max-height: 78vh; width: 100%; border: 1px solid var(--color-border); border-radius: 10px; overflow: hidden; background: #14181d; position: sticky; top: var(--space-4); }
.mv-stage:fullscreen { max-height: none; aspect-ratio: auto; border: 0; border-radius: 0; }
.mv-stage canvas { width: 100%; height: 100%; display: block; touch-action: none; outline-offset: -3px; }
.mv-load { position: absolute; inset: 0; display: grid; place-items: center; padding: var(--space-5); text-align: center; color: #cfd6de; background: rgba(20, 24, 29, .85); }
.mv-load[hidden] { display: none; }
.mv-bar { position: absolute; left: var(--space-3); bottom: var(--space-3); display: flex; gap: var(--space-2); flex-wrap: wrap; }
.mv-measure { position: absolute; left: var(--space-3); top: var(--space-3); padding: var(--space-2) var(--space-3); border-radius: 6px; background: rgba(0, 0, 0, .7); color: #ffd48a; }
.mv-measure[hidden] { display: none; }
.tg { font: inherit; font-size: var(--text-sm); min-height: 36px; padding: 0 var(--space-3); border-radius: 6px; border: 1px solid var(--color-border); background: var(--color-bg, #101317); color: var(--color-text-secondary); cursor: pointer; }
.mv-bar .tg { background: rgba(16, 19, 23, .85); color: #dfe5ec; border-color: rgba(255, 255, 255, .22); }
.tg:hover:not(:disabled) { color: var(--color-text-primary); border-color: var(--color-accent); }
.tg[aria-pressed="true"] { background: var(--color-accent-subtle); border-color: var(--color-accent); color: var(--color-text-primary); }
.tg:disabled { opacity: .45; cursor: not-allowed; }
.tgrid { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-2) 0 var(--space-3); }
.mv-panel { display: grid; gap: var(--space-2); }
.mv-panel details { border: 1px solid var(--color-border); border-radius: 8px; padding: var(--space-2) var(--space-4) var(--space-3); }
.mv-panel summary { cursor: pointer; font-weight: 600; min-height: 36px; display: flex; align-items: center; gap: var(--space-2); }
.rng { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); font-size: var(--text-sm); color: var(--color-text-secondary); margin: var(--space-2) 0; }
.rng input[type=range] { flex: 1; max-width: 190px; } .rng select { font: inherit; padding: var(--space-1) var(--space-2); }
.ptree, .ptree ul { list-style: none; margin: 0; padding: 0; max-height: 260px; overflow: auto; }
.ptree ul { padding-left: var(--space-4); }
.prow { display: flex; align-items: center; gap: var(--space-2); min-height: 32px; border-radius: 4px; }
.prow.sel { background: var(--color-accent-subtle); }
.pname { flex: 1; text-align: left; font: inherit; font-size: var(--text-sm); background: none; border: 0; color: var(--color-text-primary); cursor: pointer; padding: var(--space-1) 0; overflow-wrap: anywhere; }
.pinfo { margin-top: var(--space-3); font-size: var(--text-sm); }
.dls { list-style: none; padding: 0; margin: var(--space-2) 0 0; display: grid; gap: var(--space-3); }
.dls li { display: grid; gap: var(--space-1); } .dls .btn { justify-self: start; }
.mv-panel .spec { margin: var(--space-2) 0; }
@media (max-width: 900px) { .mv { grid-template-columns: 1fr; } .mv-stage { position: relative; top: 0; aspect-ratio: 1 / 1; min-height: 300px; } }
@media (max-width: 600px) { .mv-bar { gap: var(--space-1); } .mv-bar .tg { min-height: 30px; padding: 0 var(--space-2); font-size: .75rem; } }