/* Timeline toggle + 3D container */
.tl-switch{display:flex;gap:.5rem;margin:1rem 0}
.tl-tab{background:transparent;border:1px solid rgba(13,48,87,.25);border-radius:999px;padding:.4rem .9rem;cursor:pointer}
.tl-tab.is-active{background:rgba(13,48,87,.08)}
.hidden{display:none}
.tl3d{position:relative;aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:linear-gradient(135deg, rgba(13,48,87,.85), rgba(12,18,30,.85));box-shadow:0 14px 42px rgba(0,0,0,.25);margin-top:1rem}
.tl3d canvas{width:100%;height:100%;display:block}
.tl3d-overlay{position:absolute;inset:auto 0 0 0;padding:.6rem 1rem;color:#fff;font-size:.95rem;background:linear-gradient(180deg, rgba(0,0,0,0), rgba(0,0,0,.45))}
.timeline .tl-body p{margin:.6rem 0}
.timeline .tl-body ul{margin:.6rem 0 .2rem 1.1rem}