.drain-head{padding:4.1rem 0 2.4rem;border-bottom:1px solid var(--ln);background:radial-gradient(ellipse 75% 100% at 80% 0,rgba(67,167,205,.19),transparent 70%)}.drain-head h1{max-width:820px;margin:.75rem 0 1rem}.drain-deck{font-family:var(--serif);font-size:clamp(1.3rem,2.4vw,1.9rem);line-height:1.4;max-width:800px;color:var(--tx)}.case-section{margin-bottom:2.6rem}.section-kicker{font-size:.65rem;letter-spacing:.11em;text-transform:uppercase;color:var(--signal-blue);margin-bottom:.7rem}.case-section h2{margin:0 0 1.2rem;padding:0;border:0}.source-list{padding-left:1.25rem;font-size:.83rem;line-height:1.65}.source-list li{margin:.8rem 0;overflow-wrap:anywhere}.drain-panel,.media-panel{padding:1.2rem;border:1px solid var(--ln-2);background:var(--bg-card);margin:1.5rem 0}.drain-panel p:last-child{margin-bottom:0}.media-panel h3{font-family:var(--serif);font-weight:400;margin:0 0 .8rem}.media-panel p,.diagram-note{font-size:.78rem!important;color:var(--tx-3)!important}.video-slot{aspect-ratio:16/9;display:grid;place-items:center;background:linear-gradient(140deg,#112c3b,#09111a);margin:1rem 0;border:1px solid var(--ln-2)}.video-slot iframe{border:0;width:100%;height:100%}.video-load{color:var(--tx);padding:1rem 1.5rem;border:1px solid var(--signal-blue);background:transparent;font:inherit;font-size:.85rem;cursor:pointer}.video-load:focus-visible,.lang-switch a:focus-visible{outline:2px solid var(--signal-ice);outline-offset:4px}.drain-diagram{margin:1.6rem 0 .6rem;border:1px solid var(--ln-2);padding:1rem 1rem 0;background:#101a24;text-align:center;font-size:.67rem;letter-spacing:.12em;color:#cbe6f0}.surface-lake{width:66%;margin:auto;height:44px;display:grid;place-items:center;background:#125b7d;border-radius:4px 4px 35% 35%;position:relative;z-index:2}.ice-body{height:175px;background:linear-gradient(155deg,#193143,#26465b);position:relative;display:grid;place-items:center;overflow:hidden}.ice-body span{position:absolute;left:6%;top:42%;max-width:35%;text-align:left}.fracture{position:absolute;left:49%;top:0;height:100%;width:6px;background:#58bfe8;transform:rotate(8deg);box-shadow:0 0 17px rgba(67,167,205,.2)}.bed-water{height:30px;background:#185576;display:grid;place-items:center}.bed-rock{height:48px;background:#292c30;display:grid;place-items:center}.arc-sidebar .locked-thread{display:block}.arc-sidebar p{font-size:.8rem;line-height:1.7;color:var(--tx-3)}.fiction-note{color:var(--tx-3)!important}.arc-body .route-card{color:var(--tx);border:1px solid var(--ln-2)}.arc-body .route-card:hover{border-color:var(--signal-blue)}@media(max-width:760px){.drain-head{padding:2.7rem 0 1.8rem}.media-panel{padding:1rem}.drain-diagram{padding:.65rem .65rem 0}}