.double-fold-angles{width:100%;min-width:0}.double-fold-intro{line-height:1.85}.double-fold-caption{background:var(--surface-soft);border-left:4px solid var(--accent);border-radius:var(--radius-small);padding:15px 17px}.double-fold-caption strong{font-size:1rem;display:block}.double-fold-caption p{color:var(--ink);margin:7px 0 0;font-size:.88rem;line-height:1.85}.double-fold-camera{flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px;display:flex}.double-fold-camera>span{color:var(--muted);margin-right:auto;font-size:.75rem}.double-fold-camera .button{min-height:44px;padding:8px 12px;font-size:.8rem}.double-fold-canvas{isolation:isolate;touch-action:none;width:100%;height:410px;position:relative;overflow:hidden}.double-fold-canvas canvas{touch-action:none}.double-fold-label{color:var(--ink);background:var(--surface);border:1px solid var(--line-strong);white-space:nowrap;border-radius:4px;padding:2px 5px;font-size:12px;font-weight:700;line-height:1.45;display:block}.double-fold-label--reference{border-style:dashed;font-size:10px;font-weight:500}.double-fold-angle-key{border:1px solid var(--line);border-radius:var(--radius-small);margin:0 0 13px;padding:10px 13px}.double-fold-angle-key p{color:var(--ink);margin:5px 0;font-size:.8rem;line-height:1.8}.double-fold-angle-mark{vertical-align:middle;border-top:3px solid;width:25px;margin-right:8px;display:inline-block}.double-fold-angle-mark--dashed{border-top-style:dashed}.double-fold-angle-mark--first{border-top-color:var(--diagram-first)}.double-fold-angle-mark--second{border-top-color:var(--accent)}.double-fold-key{color:var(--muted);flex-wrap:wrap;justify-content:center;gap:7px 18px;font-size:.74rem;display:flex}.double-fold-key>span{align-items:center;gap:5px;display:inline-flex}.double-fold-key i{border:1px solid var(--line-strong);border-radius:2px;width:13px;height:13px}.double-fold-key--fixed{background:var(--surface-soft)}.double-fold-key--retained{background:var(--highlight)}.double-fold-key--flap{background:var(--accent-soft)}.double-fold-note{color:var(--muted);margin:12px 0 0;font-size:.74rem;line-height:1.8}.double-fold-reason{border:2px solid var(--accent);background:var(--accent-soft);border-radius:var(--radius-small);margin-top:16px;padding:15px 17px}.double-fold-reason>strong{color:var(--accent)}.double-fold-reason p{margin:9px 0 0;font-size:.88rem;line-height:1.8}.double-fold-reason b{color:var(--accent)}@media (width<=600px){.double-fold-canvas{height:320px}.double-fold-camera>span{flex-basis:100%}.double-fold-caption{padding:12px}.double-fold-caption p{font-size:.83rem}.double-fold-reason{padding:12px}}