.feat-atrium{padding:2.2rem 0;background:#081830}
.feat-atrium-layout{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:center}
@media(max-width:860px){.feat-atrium-layout{grid-template-columns:1fr}}
.feat-atrium h1{font-size:clamp(1.3rem,3.5vw,1.75rem);color:#e8f4fc;margin-bottom:.6rem;line-height:1.35}
.feat-atrium h1 em{color:#4dd0e1;font-style:normal}
.feat-atrium > .container > p,.feat-atrium-layout > div > p{color:#6a9ab8;font-size:.9rem;margin-bottom:1rem}

.species-stats{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:1rem}
.species-stats div{background:#0d2848;border:2px solid #2a6a8a;padding:.65rem 1rem;text-align:center;min-width:90px}
.species-stats strong{display:block;font-size:1.2rem;color:#4dd0e1}
.species-stats span{font-size:.68rem;color:#6a9ab8}

.round-tank-wrap{display:flex;justify-content:center}
.round-tank{width:min(320px,85vw);aspect-ratio:1;border-radius:50%;border:4px solid #2a6a8a;background:#0a2038;padding:12px;overflow:hidden}
.round-tank img{width:100%;height:100%;object-fit:cover;border-radius:50%}

.creature-catalog{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
@media(max-width:768px){.creature-catalog{grid-template-columns:1fr}}
.creature-cell{text-align:center;padding:1rem .75rem;background:#0a2038;border:2px solid #1a4a6a;border-radius:50% 50% 12px 12px}
.creature-cell .emoji{font-size:2rem;margin-bottom:.4rem}
.creature-cell h3{font-size:.88rem;color:#e8f4fc;margin-bottom:.3rem}
.creature-cell p{font-size:.78rem;color:#6a9ab8;line-height:1.45}

.zone-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:.85rem;margin-bottom:1.5rem}
@media(max-width:640px){.zone-strip{grid-template-columns:1fr}}
.zone-badge{background:#123050;border-left:4px solid #4dd0e1;padding:.75rem 1rem}
.zone-badge .zone-id{font-size:.68rem;color:#f0c060;font-weight:800;margin-bottom:.25rem}
.zone-badge h3{font-size:.88rem;color:#e8f4fc;margin-bottom:.2rem}
.zone-badge p{font-size:.76rem;color:#6a9ab8}

.habitat-dual{display:grid;grid-template-columns:1.2fr 1fr;gap:1.5rem;align-items:start}
@media(max-width:768px){.habitat-dual{grid-template-columns:1fr}}
.habitat-list{background:#0a2038;border:3px solid #2a6a8a}
.habitat-list .list-head{padding:.55rem 1rem;background:#123050;border-bottom:2px solid #c8a040;font-size:.75rem;color:#f0c060;font-weight:800}
.habitat-list .list-body{padding:1rem}
.habitat-list h3{font-size:.9rem;color:#4dd0e1;margin-bottom:.5rem}
.habitat-list li{font-size:.82rem;color:#6a9ab8;padding:.3rem 0;border-bottom:1px dashed #1a3050}
.habitat-list li:last-child{border-bottom:none}

.habitat-img .glass-frame{padding:6px}

.feat-cta{background:#0d2848;padding:2.2rem 0;text-align:center;border-top:3px solid #f0c060}
.feat-cta h2{font-size:1.15rem;color:#e8f4fc;margin-bottom:.4rem}
.feat-cta p{font-size:.85rem;color:#6a9ab8;margin-bottom:1rem}