/* Isolated coastal study. The production WORKS is intentionally untouched. */
body{background:#0b1720}#shell{background:none}header,footer{background:#0b1720;border-color:#34495799}
.arena{background:#0b1720;overflow:hidden;min-height:460px;height:calc(100svh - 224px)}
.coastal-world{position:absolute;inset:0;z-index:-3;pointer-events:none;background:#0b1720 url(coastal-assets/horizon-v1.png) center/cover no-repeat;transition:opacity 1.4s ease,filter 1.4s ease}
.coastal-world canvas{position:absolute;inset:0;width:100%;height:100%}
.coastal-world canvas:first-child{opacity:0;transition:opacity .9s ease}
.coastal-world.is-rendered canvas:first-child{opacity:1}
.coastal-world::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#0b1720ee 0%,#0b17208a 15%,transparent 33%,transparent 85%,#0b17204a),linear-gradient(0deg,#0b1720 0%,#0b172022 24%,transparent 72%,#0b172099 100%);pointer-events:none}
.coastal-world[data-world=earth]{background-image:url(coastal-assets/horizon-earth-v1.png)}
.world-choice{position:absolute;right:4%;bottom:68px;z-index:2;display:flex;gap:13px}
.world-choice button{font:8px monospace;letter-spacing:.16em;color:#7d95a6;padding:5px 2px;border-bottom:1px solid transparent;min-height:30px}
.world-choice button[aria-pressed=true]{color:#aec5d4;border-color:#668da566}
.world-choice button:hover{color:#b0d4eb}.opened .world-choice,.is-opening .world-choice{visibility:hidden}
#field{opacity:.82;transition:opacity 1s}#core,#core:hover,#core:active,#core:focus-visible{left:57%;top:46%}
.arena .lunar-portal{z-index:0;left:18%;top:0;right:auto;width:24%;height:37%;border-radius:50%;background:none;box-shadow:none}
.arena .lunar-portal::before,.arena .lunar-portal>*{display:none}
.arena .lunar-portal:focus-visible{outline:1px solid #95c1de66;outline-offset:-12px}
.arena .lunar-portal.coastal-locked{pointer-events:none;cursor:default}
.coastal-signature{position:absolute;right:4%;bottom:33px;display:flex;align-items:center;gap:17px;pointer-events:none;font:8px/1.8 monospace;letter-spacing:.24em;color:#718999}
.coastal-signature i{display:block;width:60px;height:1px;background:linear-gradient(90deg,transparent,#8ab6d777)}
.rail{opacity:.5}.microfield{opacity:.7}.chapter{text-shadow:0 1px 8px #07121c}
.opened .coastal-world,.is-opening .coastal-world{opacity:.18;filter:blur(3px)}
.opened #field{opacity:.22}.is-loading .coastal-signature,.opened .coastal-signature{opacity:0}
footer #eq{width:180px;height:44px;padding-right:18px}
@media(min-width:851px) and (max-height:850px){
 .microfield .microgrid,.microfield .microlines,#reconfigure{display:none}
 .microfield{margin-top:16px;padding-bottom:8px}#index-scan{height:44px}.corner{bottom:20px}
}
@media(max-width:850px){
 .arena{min-height:560px;height:calc(100svh - 204px)}
 .coastal-world{background-size:auto 100%;background-position:44% center}
 .coastal-world::after{background:linear-gradient(0deg,#0b1720 0%,#0b1720f5 21%,#0b172060 47%,transparent 74%,#0b172066 100%)}
 #core,#core:hover,#core:active,#core:focus-visible{left:50%;top:34%}#field{opacity:.68}
 .world-choice{right:5%;top:15px;bottom:auto;gap:15px}.world-choice button{min-height:44px}
 .arena .lunar-portal{left:9%;top:0;width:37%;height:22%}
 .coastal-signature{display:none}.rail{opacity:.25}.microfield{display:none}
 footer #eq{width:116px}
}
@media(prefers-reduced-motion:reduce){.coastal-world,.coastal-world canvas:first-child,#field{transition:none}}