:host{color-scheme:dark;--bg:#081b16;--surface:#0b241c;--wash:#102d22;--ink:#f0f1e8;--muted:#b4c9bc;--green:#9bce9f;--border:#365c45;--strong:#163e29;--shadow:0 16px 40px #0003}
:host([data-theme=light]){color-scheme:light;--bg:#f8f9fa;--surface:#fff;--wash:#edf3ed;--ink:#153425;--muted:#526557;--green:#1b7f47;--border:#a4c1ac;--strong:#dfeddf;--shadow:0 16px 40px #213b2110}
*{box-sizing:border-box}.guide-shell{margin:0;background:var(--bg);color:var(--ink);font:14px/1.65 Manrope,Arial,sans-serif}button,a,input{touch-action:manipulation}button{font:inherit;color:inherit;cursor:pointer}button,a{ -webkit-tap-highlight-color:transparent}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--green);outline-offset:4px}button{border:1px solid var(--border);background:transparent}button:hover{background:var(--strong)}[hidden]{display:none!important}h1,h2,h3,p,figure{margin:0}h1,h2,h3{font-family:Marcellus,Georgia,serif;font-weight:400;line-height:1.18}p+p{margin-top:14px}.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:.16em;color:var(--green);font-weight:700}.site-header{max-width:1256px;margin:auto;min-height:94px;padding:20px 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@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.context p,.cover-copy p,.field-note,.rilli-note figcaption,.glossary dd,.care-bands p,.checklist small,.education-note,.after p,.tip{font-size:14px}.info{min-width:36px;width:36px;min-height:40px;height:40px;border:0}

/* B keeps the surrounding chapter controls and central habitat. */
:host{scroll-padding-top:78px}.context{padding:12px 28px 22px}.context h1{font-size:18px}.context p{font-size:14px}.guide{border-radius:6px;background:linear-gradient(130deg,var(--surface),var(--bg));overflow:visible}.guide-cover{padding:26px 32px;border-radius:6px 6px 0 0}.cover-copy h2{font-size:32px}.cover-mark{border-radius:6px;width:58px;height:58px}.cover-copy{max-width:700px}.open-button{margin-left:auto;background:#1b7f47;color:white;border-color:#1b7f47}.explorer-intro{padding-top:20px}.explorer{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);margin-top:16px}.habitat{top:18px;padding-top:8px}.orbit{gap:12px}.chapter{border-radius:6px;padding:12px;min-height:62px;border:1px solid var(--border);font-size:14px}.chapter[aria-pressed=true]{background:var(--strong);border-color:var(--green)}.chapter:hover{border-color:var(--green)}.tank-frame{padding:12px 0 0;margin:16px 0 8px;background:radial-gradient(ellipse at 50% 65%,var(--wash),transparent 74%);border-radius:6px}.tank-frame[data-focus=shrimp] .diagram-part:not(.tank-shrimp),.tank-frame[data-focus=water] .diagram-part:not(.tank-water),.tank-frame[data-focus=plants] .diagram-part:not(.tank-plants),.tank-frame[data-focus=substrate] .diagram-part:not(.tank-substrate),.tank-frame[data-focus=filter] .diagram-part:not(.tank-filter){opacity:.68}.hotspot{width:44px;height:44px;transform:translate(-20%,-20%);box-shadow:0 0 0 4px color-mix(in srgb,var(--green) 12%,transparent);font-size:20px}.hotspot[aria-pressed=true]{box-shadow:0 0 0 6px color-mix(in srgb,var(--green) 25%,transparent);outline:1px solid var(--green);outline-offset:5px}.diagram-caption{padding-bottom:18px}.field-note{border-left:0;border-top:1px solid var(--border);padding:15px 0 0;max-width:none;min-height:66px}.reading{padding-top:8px;padding-bottom:24px}.reading h2{font-size:30px}.tree .leaves{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 10px}.tree-row{min-height:44px;gap:2px}.tree-row>a{font-size:14px;min-width:0}.info{width:44px;min-width:44px;height:44px}.rilli-note figcaption{font-size:14px}.component-menu button{min-height:48px;font-size:14px;border-radius:5px}.component-detail{min-height:0}.component-detail h3{font-size:24px}.component-menu button[aria-pressed=true]{background:var(--green);color:var(--bg)}.tip{z-index:80}.guide-end{border-radius:0 0 6px 6px}.guide-end span{font-size:13px}
#theme-toggle{position:fixed;left:12px;top:104px;z-index:50;width:44px;height:44px;min-height:44px;padding:0;border-radius:50%;font-size:20px;background:var(--surface);color:var(--green);box-shadow:0 3px 12px #0002}.guide-shop{margin:24px 0 0;padding:18px 0 0;border-top:1px solid var(--border)}.guide-shop h3{font:700 14px/1.5 Manrope,sans-serif;margin-bottom:5px}.guide-shop p{font-size:14px;color:var(--muted);margin:0 0 10px}.guide-shop a{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:48px;color:var(--green);font-weight:600;text-decoration:none;border-bottom:1px solid var(--border)}.guide-shop a:hover{text-decoration:underline}.guide-shop a::after{content:'↗'}.reading-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;border-top:1px solid var(--border);margin-top:24px;padding-top:14px}.reading-footer button{min-height:44px;padding:8px 12px;border-radius:4px;font-size:14px}.reading-footer .next-chapter{margin-left:auto;background:var(--strong);border-color:var(--green)}.reader-toolbar{display:none}.tank-photo{width:100%;height:auto;display:block;border-radius:6px}.tank-frame.has-photo{padding:0}.tank-frame.has-photo>svg{display:none}.tank-frame.has-photo .hotspot{transform:translate(-50%,-50%)}
@media(min-width:768px) and (max-width:1099px){.context{padding-left:65px}.guide{margin-inline:20px}.habitat{padding-inline:20px}.reading{padding-inline:22px}.chapter{font-size:13px;padding:10px 8px;gap:7px}.tree .leaves{grid-template-columns:1fr}.reading h2{font-size:27px}.hotspot{width:40px;height:40px}}
@media(max-width:767px){.site-header{min-height:70px}.header-actions a{max-width:none;font-size:12px}.context{padding:8px 0 18px 45px;min-height:62px}.context h1{font-size:17px}.context p{display:none}#theme-toggle{top:78px}.guide-cover{padding:22px 18px}.cover-copy h2{font-size:28px}.cover-copy p{font-size:14px}.open-button{width:100%;margin-left:0}.explorer-intro{padding:16px 18px 0;font-size:14px}.habitat{padding:12px 18px 20px;scroll-margin-top:12px}.orbit{gap:8px}.chapter{min-height:54px;font-size:13px;gap:7px;padding:8px}.chapter em{width:24px;height:24px}.tank-frame{max-width:440px;margin:10px auto 2px;padding-top:0}.diagram-caption{padding-inline:0;gap:8px;align-items:center}.diagram-caption span:last-child{max-width:150px;text-align:right}.field-note{font-size:14px;min-height:0;margin-top:16px;padding-top:12px}.reading{padding:0 18px 24px;scroll-margin-top:0}.reader-toolbar{position:sticky;top:0;z-index:25;display:flex;justify-content:space-between;align-items:center;gap:12px;background:var(--surface);padding:10px 0;border-bottom:1px solid var(--border);margin-bottom:20px;box-shadow:0 5px 10px #0001}.reader-toolbar button{min-height:44px;padding:6px 10px;font-size:13px;border-radius:4px;color:var(--green)}.reader-toolbar select{max-width:58%;font:600 13px Manrope,sans-serif;background:var(--surface);color:var(--ink);border:1px solid var(--border);border-radius:4px;min-height:44px;padding:6px}.chapter-content{scroll-margin-top:82px}.reading h2{font-size:27px}.tree .leaves{gap:2px 6px;padding-left:10px}.tree>li>ul{padding-left:12px}.tree-row>a{font-size:14px;overflow-wrap:anywhere}.info{width:38px;min-width:38px}.glossary{grid-template-columns:1fr;gap:12px}.guide-end{padding-inline:18px}.guide-end>span{max-width:190px}.rilli-note{grid-template-columns:84px 1fr;gap:12px}.rilli-note img{width:84px;height:84px}.reading-footer button{font-size:13px}.after h2{font-size:24px}.tank-frame.has-photo{margin-block:14px}}
@media(max-width:359px){.tree .leaves{grid-template-columns:1fr}.chapter{font-size:12px}.chapter em{width:22px;height:22px}.cover-copy h2{font-size:26px}.component-menu{grid-template-columns:1fr}.reader-toolbar{gap:8px}.reader-toolbar select{font-size:12px}.hotspot{width:38px;height:38px}}
.arrival-checks{border-top:1px solid var(--border)}.arrival-checks details{border-bottom:1px solid var(--border)}.arrival-checks summary{cursor:pointer;padding:17px 22px 17px 0;font-weight:700;min-height:60px}.arrival-checks summary span{display:block;color:var(--muted);font-size:13px;font-weight:400;margin-top:3px}.arrival-checks details>div{padding:0 0 20px;color:var(--muted)}.arrival-checks p{font-size:14px}.arrival-checks summary:focus-visible{outline:3px solid var(--green);outline-offset:2px}.revisit-water{min-height:44px;margin-top:12px;padding:8px 12px;border-radius:4px;color:var(--green)}.arrival-plan{margin:24px 0}.arrival-plan h3{font-size:23px;margin-bottom:10px}.arrival-plan p{color:var(--muted)}.arrival-plan a{display:inline-flex;align-items:center;min-height:48px;color:var(--green);font-weight:600}.habitat>figure{margin-top:0}.habitat>.orbit{margin-top:2px}.tank-frame{margin-top:0}.chapter em{align-self:flex-start;margin-top:2px}.chapter{line-height:1.4}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.tank-frame.has-photo{overflow:hidden;isolation:isolate;border:1px solid var(--border);border-radius:6px;aspect-ratio:4/3;background:#15211e;box-shadow:0 10px 30px #0002}.tank-frame.has-photo>.tank-photo{width:100%;height:100%;object-fit:contain;border-radius:0;transition:filter .35s ease}.photo-focus{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;pointer-events:none;z-index:1;opacity:0;transition:opacity .35s ease;filter:brightness(1.06);mask-repeat:no-repeat}.has-photo[data-focus=shrimp]>.tank-photo,.has-photo[data-focus=water]>.tank-photo,.has-photo[data-focus=plants]>.tank-photo,.has-photo[data-focus=substrate]>.tank-photo,.has-photo[data-focus=filter]>.tank-photo{filter:none}.has-photo:is([data-focus=shrimp],[data-focus=water],[data-focus=plants],[data-focus=substrate],[data-focus=filter]) .photo-focus{opacity:1}.has-photo[data-focus=shrimp] .photo-focus{mask-image:radial-gradient(ellipse 12% 9% at 46% 61%,black 55%,transparent 100%)}.has-photo[data-focus=filter] .photo-focus{mask-image:radial-gradient(ellipse 18% 29% at 56.5% 29%,black 65%,transparent 100%)}.has-photo[data-focus=plants] .photo-focus{mask-image:radial-gradient(ellipse 31% 19% at 27% 47%,black 58%,transparent 100%)}.has-photo[data-focus=substrate] .photo-focus{mask-image:linear-gradient(transparent 45%,black 53%,black 63%,transparent 72%)}.has-photo[data-focus=water] .photo-focus{mask-image:linear-gradient(black 0%,black 19%,transparent 46%)}.has-photo .hotspot{z-index:4;width:40px;height:40px;background:#10291fe6;border:1px solid #d8f3df;color:#fff;box-shadow:0 0 0 4px #0002;backdrop-filter:blur(3px)}.has-photo .hotspot[aria-pressed=true]{background:#1b7f47;outline-color:#bdf1ce;color:white}.photo-view-controls{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:10px 0 12px}.photo-view-controls button{font-size:12px;min-height:44px;padding:6px 10px;border-radius:5px;color:var(--green)}.photo-view-controls button[aria-pressed=true]{background:var(--strong)}.photo-caption{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:48px;padding:0 0 14px}.photo-caption p{color:var(--muted);font-size:13px;margin:0}.photo-caption strong{display:block;color:var(--ink);font-size:14px}.photo-caption button{flex:none;min-height:44px;padding:8px 11px;font-size:13px;border-radius:4px;color:var(--green)}.photo-credit{font-size:12px;color:var(--muted);line-height:1.5;margin:0 0 16px}.photo-off .photo-focus{opacity:0!important}.photo-off>.tank-photo{filter:none!important}.photo-off .photo-bubble{display:none}.photo-bubble{position:absolute;z-index:2;width:4px;height:4px;border:1px solid #d8f4f0;border-radius:50%;left:56%;top:18%;opacity:0;pointer-events:none}.photo-bubble:nth-of-type(2){left:55%;animation-delay:.7s}.photo-bubble:nth-of-type(3){left:57%;animation-delay:1.3s}.photo-bubble:nth-of-type(4){left:56.5%;animation-delay:2s}
@media(prefers-reduced-motion:no-preference){.has-photo[data-focus=filter]:not(.photo-off):not(.motion-paused) .photo-bubble{animation:photo-air 3s ease-out infinite}}@keyframes photo-air{0%{transform:translateY(0);opacity:0}20%{opacity:.5}85%{opacity:.3}100%{transform:translateY(-35px);opacity:0}}
@media(max-width:767px){.photo-caption{gap:10px}.photo-caption p{font-size:12px}.photo-caption strong{font-size:14px}.photo-caption button{font-size:12px}.has-photo .hotspot{width:34px;height:34px;font-size:17px}.photo-view-controls{gap:6px}.photo-view-controls button{font-size:12px;padding-inline:8px}.photo-credit{margin-bottom:12px}.habitat{scroll-margin-top:12px}.photo-caption{padding-bottom:8px}}
.habitat:has(.has-photo) .field-note{display:none}
.photo-view-controls button[aria-pressed=true],.photo-view-controls button:hover,.photo-caption button:hover{color:var(--ink)}
@media(prefers-reduced-motion:reduce){.photo-bubble{animation:none!important}.photo-focus,.tank-photo{transition:none!important}.photo-motion{display:none}}

:host{display:block;margin:0;color:var(--ink);font:14px/1.65 Manrope,Arial,sans-serif;text-align:left}
.guide-shell{margin:0;background:transparent}
.guide{margin:0;max-width:none;box-shadow:none}
.guide-cover{padding:28px 32px}.cover-mark{display:none}
.guide-cover h2{text-transform:none;letter-spacing:normal}
.habitat{top:100px}.reading,.habitat{scroll-margin-top:105px}
.hotspot{padding:0;display:grid;place-items:center;border-radius:50%;line-height:1}
.has-photo .hotspot{width:44px;height:44px;border-radius:50%;font-size:20px}
#theme-toggle{display:none!important}
.tip{z-index:10000}
@media(max-width:767px){.guide-cover{padding:22px 18px}.guide{margin:0}.reader-toolbar{top:80px}.reader-toolbar select{font-size:16px}.reading,.habitat{scroll-margin-top:96px}.has-photo .hotspot{width:40px;height:40px;font-size:19px}.photo-view-controls button{font-size:13px}}

.guide-slider{--slide-x:0px;position:relative;flex:0 0 38%;width:38%;max-width:420px;height:54px;margin-left:auto;border:1px solid var(--border);border-radius:6px;background:var(--strong);overflow:hidden;touch-action:pan-y;user-select:none;cursor:default}
.guide-slider:focus-visible{outline:3px solid var(--green);outline-offset:4px}
.guide-slider__fill{position:absolute;inset:0 auto 0 0;width:calc(var(--slide-x) + 48px);background:var(--green);opacity:.15;pointer-events:none}
.guide-slider__label{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:0 10px 0 54px;color:var(--ink);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;pointer-events:none}
.guide-slider__knob{position:absolute;left:4px;top:4px;width:44px;height:44px;display:grid;place-items:center;border-radius:50%;background:var(--green);color:var(--bg);font-size:30px;font-weight:500;line-height:1;transform:translateX(var(--slide-x));touch-action:none;cursor:grab;box-shadow:0 2px 8px #0003}
.guide-slider.is-open .guide-slider__label{padding:0 54px 0 10px}.guide-slider.is-dragging .guide-slider__knob{cursor:grabbing}
.guide-slider.is-anim .guide-slider__knob{transition:transform .3s cubic-bezier(.2,.7,.2,1)}.guide-slider.is-anim .guide-slider__fill{transition:width .3s cubic-bezier(.2,.7,.2,1)}
.guide-slider.is-nudge:not(.is-open) .guide-slider__knob{animation:guide-slide-nudge .5s ease}
@keyframes guide-slide-nudge{50%{transform:translateX(9px)}}
@media(max-width:767px){.guide-slider{flex-basis:100%;width:100%;max-width:none;margin-left:0}.guide-slider__label{font-size:10px;letter-spacing:.06em}}
@media(prefers-reduced-motion:reduce){.guide-slider .guide-slider__knob,.guide-slider .guide-slider__fill{animation:none!important;transition:none!important}}