@font-face{font-family:"Bricolage";src:url(/fonts/bricolage.woff2) format("woff2");font-weight:200 800;font-stretch:75% 100%;font-display:swap}
@font-face{font-family:"Hanken";src:url(/fonts/hanken.woff2) format("woff2");font-weight:100 900;font-display:swap}
:root{
  --abyss:#06141a;--deep:#0b222b;--deeper:#081b22;--line:rgba(159,216,208,.2);--line-soft:rgba(159,216,208,.1);
  --text:#e4eeea;--muted:#93adab;--glass:#9fd8d0;--lamp:#f2b45a;--bad:#ff8f73;--warn:#f2b45a;--good:#8fd694;
  --display:"Bricolage","Arial Narrow",system-ui,sans-serif;--body:"Hanken",system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:68rem;--gutter:clamp(1rem,4vw,2.5rem);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--abyss);color:var(--text);font:400 1.0625rem/1.6 var(--body);font-variant-numeric:tabular-nums}
img,svg{max-width:100%;display:block}
a{color:var(--lamp);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--lamp);outline-offset:3px;border-radius:2px}
h1,h2,h3{font-family:var(--display);font-weight:600;font-stretch:88%;line-height:1.08;letter-spacing:-.012em;margin:0;text-wrap:balance}
h1{font-size:clamp(2.3rem,6vw,4.1rem)}
h2{font-size:clamp(1.55rem,3.2vw,2.15rem)}
h3{font-size:1.2rem;font-stretch:95%;letter-spacing:0}
p{margin:0 0 1em;max-width:66ch;text-wrap:pretty}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.muted{color:var(--muted)}
.small{font-size:.9rem}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:var(--lamp);color:#000;padding:.5rem .8rem;z-index:10}

/* header */
.top{border-bottom:1px solid var(--line-soft);background:var(--abyss)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-block:.85rem}
.mark{font-family:var(--display);font-weight:700;font-stretch:80%;font-size:1.3rem;color:var(--text);text-decoration:none;display:flex;align-items:center;gap:.55rem}
.mark svg{width:1.7rem;height:1.2rem}
.top nav{display:flex;gap:1.3rem;flex-wrap:wrap;font-size:.97rem}
.top nav a{color:var(--text);text-decoration:none;padding-block:.2rem;border-bottom:1px solid transparent}
.top nav a:hover,.top nav a[aria-current]{border-bottom-color:var(--lamp)}

/* hero */
.hero{position:relative;min-height:min(78vh,40rem);display:flex;align-items:flex-end;isolation:isolate;overflow:hidden}
.hero picture,.hero picture img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(6,20,26,.15) 0%,rgba(6,20,26,.2) 45%,rgba(6,20,26,.96) 100%)}
.hero .wrap{width:100%;padding-block:3rem 2.6rem}
.hero h1{max-width:17ch;text-shadow:0 2px 30px rgba(0,0,0,.6)}
.hero p{font-size:1.2rem;max-width:44ch;margin-top:1rem;color:#d5e3df}
.jump{display:flex;gap:.6rem;flex-wrap:wrap;align-items:center;margin-top:1.4rem}
.jump label{font-weight:600}

/* forms */
select,input[type=number],input[type=text],input[type=search]{font:inherit;color:var(--text);background:var(--deeper);border:1px solid var(--line);border-radius:3px;padding:.55rem .7rem;min-height:2.75rem;width:100%}
select{appearance:none;padding-right:2.2rem;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%239fd8d0' stroke-width='1.6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .75rem center;background-size:.7rem}
.jump select{width:auto;min-width:15rem;background-color:rgba(6,20,26,.85)}
button,.btn{font:600 1rem var(--body);color:#1a1205;background:var(--lamp);border:0;border-radius:3px;padding:.6rem 1.1rem;min-height:2.75rem;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center}
button:hover,.btn:hover{background:#ffc876}
button.quiet{background:transparent;color:var(--text);border:1px solid var(--line);padding:.3rem .65rem;min-height:2.2rem;min-width:2.2rem;justify-content:center}
button.quiet:hover{border-color:var(--glass);background:transparent}
label{display:block;font-size:.93rem;color:var(--muted);margin-bottom:.3rem}
.field{min-width:0}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));gap:.9rem 1rem;align-items:end}
fieldset{border:0;padding:0;margin:0 0 1.4rem}
legend{font-family:var(--display);font-weight:600;font-size:1.15rem;padding:0;margin-bottom:.7rem}
[hidden]{display:none!important}

/* sections */
.band{padding-block:clamp(2.6rem,6vw,4.5rem)}
.band + .band{border-top:1px solid var(--line-soft)}
.band>.wrap>h2{margin-bottom:.6rem}
.band>.wrap:not(.prose)>h2 + p{color:var(--muted);margin-bottom:1.6rem}
.water{background:var(--deeper) url(/img/texture.webp) center top/cover no-repeat}

/* to-scale lineup */
.lineup{overflow-x:auto;padding-bottom:.8rem;margin-inline:calc(var(--gutter)*-1);padding-inline:var(--gutter);scrollbar-color:var(--line) transparent}
.lineup svg{max-width:none;height:auto}
.lineup a text{fill:var(--text)}
.lineup a:hover .tk-glass,.lineup a:focus .tk-glass{stroke:var(--lamp)}
.lineup a:hover text,.lineup a:focus text{fill:var(--lamp)}
.tk-glass{fill:url(#wg);stroke:var(--glass);stroke-width:1.5}
.tk-rim{fill:#02090c}
.tk-sub{fill:#2a2f2a}
.tk-stand{fill:#0d1a20;stroke:rgba(159,216,208,.14)}
.dim line,.dim path{stroke:var(--muted);stroke-width:1;fill:none}
.dim text,.lbl{font:500 13px var(--body);fill:var(--muted)}
.dim text.big{font:600 17px var(--display);fill:var(--text)}

/* photo tiles */
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.tile{position:relative;display:block;color:var(--text);text-decoration:none;overflow:hidden;border-radius:2px;aspect-ratio:4/3;isolation:isolate}
.tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;transition:transform .5s ease}
.tile:hover img{transform:scale(1.03)}
.tile::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,transparent 40%,rgba(6,20,26,.94))}
.tile span{position:absolute;left:1.1rem;right:1.1rem;bottom:1rem}
.tile b{display:block;font:600 1.45rem/1.1 var(--display);font-stretch:88%}
.tile small{color:#cfdcd8;font-size:.93rem}
@media (max-width:44rem){.tiles{grid-template-columns:1fr}.tile{aspect-ratio:16/9}}

/* tables */
.scroll{overflow-x:auto;margin-inline:calc(var(--gutter)*-1);padding-inline:var(--gutter)}
table{border-collapse:collapse;width:100%;font-size:1rem}
th,td{text-align:left;padding:.62rem .9rem .62rem 0;border-bottom:1px solid var(--line-soft);vertical-align:baseline;white-space:nowrap}
thead th{font-weight:500;font-size:.9rem;color:var(--muted);border-bottom-color:var(--line)}
td.num,th.num{text-align:right;padding-right:1.4rem}
tbody th{font-weight:600}
tbody th a{color:var(--text);text-decoration-color:var(--line)}
tbody th a:hover{color:var(--lamp)}
tr.grp th{font:600 1.1rem var(--display);color:var(--glass);padding-top:1.6rem;border-bottom-color:var(--line)}
table.facts th{font-weight:400;color:var(--muted);white-space:normal;width:55%}
table.facts td{font-weight:600;white-space:normal}

/* tank page */
.crumbs{font-size:.9rem;color:var(--muted);padding-top:1.4rem}
.crumbs a{color:var(--muted)}
.crumbs ol{list-style:none;display:flex;gap:.5rem;flex-wrap:wrap;margin:0;padding:0}
.crumbs li + li::before{content:"/";margin-right:.5rem;opacity:.5}
.tank-head{padding-block:1.6rem 3rem}
.tank-head h1{font-size:clamp(2rem,5vw,3.3rem)}
.dims{font-family:var(--display);font-weight:600;font-stretch:76%;font-size:clamp(3rem,11vw,6.6rem);line-height:.95;letter-spacing:-.02em;margin:1.2rem 0 .35rem;color:var(--text);display:flex;flex-wrap:wrap;align-items:baseline;gap:0 .18em}
.dims i{font-style:normal;color:var(--glass);font-weight:300;font-size:.6em}
.dims small{font:500 1.05rem var(--body);font-stretch:100%;letter-spacing:0;color:var(--muted);margin-left:.5rem}
.dims-key{color:var(--muted);margin:0 0 1.2rem}
.drawing{margin-top:2.2rem;overflow-x:auto;padding-bottom:.4rem}
.two{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:clamp(1.5rem,5vw,4rem);align-items:start}
@media (max-width:52rem){.two{grid-template-columns:1fr}}
.fits{list-style:none;margin:0;padding:0;columns:2;column-gap:2rem}
.fits li{break-inside:avoid;padding:.42rem 0;border-bottom:1px solid var(--line-soft);display:flex;justify-content:space-between;gap:1rem}
.fits li b{font-weight:600}
.fits li span{color:var(--muted);white-space:nowrap}
@media (max-width:36rem){.fits{columns:1}}
.toobig{margin:0;padding-left:1.1rem;color:var(--muted)}
.toobig li{margin-bottom:.35rem;max-width:66ch}
.near{display:flex;flex-wrap:wrap;gap:.6rem;list-style:none;padding:0;margin:0}
.near a{display:block;border:1px solid var(--line);border-radius:2px;padding:.55rem .9rem;color:var(--text);text-decoration:none}
.near a:hover{border-color:var(--lamp)}
.near small{display:block;color:var(--muted)}
.callout{border-left:2px solid var(--glass);padding:.2rem 0 .2rem 1rem;color:var(--muted);max-width:64ch;margin:1.4rem 0 0}

/* calculators */
.tools{display:grid;grid-template-columns:repeat(2,1fr);gap:0 3rem}
.tools a{display:block;padding:1.1rem 0;border-top:1px solid var(--line);color:var(--text);text-decoration:none}
.tools a b{font:600 1.35rem var(--display);font-stretch:90%;display:block}
.tools a span{color:var(--muted)}
.tools a:hover b{color:var(--lamp)}
@media (max-width:44rem){.tools{grid-template-columns:1fr}}
.calc{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(1.5rem,5vw,4rem);align-items:start}
@media (max-width:52rem){.calc{grid-template-columns:1fr}}
.result{background:var(--deep);border:1px solid var(--line);border-radius:2px;padding:1.4rem 1.5rem;position:sticky;top:1rem}
@media (max-width:52rem){.result{position:static}}
.result .big{font:600 clamp(2.6rem,7vw,4rem)/1 var(--display);font-stretch:78%;margin:.1rem 0 .2rem}
.result .big small{font:500 1.05rem var(--body);color:var(--muted);margin-left:.3rem}
.result dl{display:grid;grid-template-columns:1fr auto;gap:.45rem 1rem;margin:1.1rem 0 0}
.result dt{color:var(--muted)}
.result dd{margin:0;font-weight:600;text-align:right}
.result .hint{color:var(--muted);font-size:.92rem;margin:1rem 0 0}
.meter{height:1.5rem;background:var(--deeper);border:1px solid var(--line);position:relative;margin:.9rem 0 .4rem;overflow:hidden}
.meter i{position:absolute;left:0;top:0;bottom:0;background:var(--good);transition:width .25s ease}
.meter[data-band=full] i{background:var(--glass)}.meter[data-band=over] i{background:var(--warn)}.meter[data-band=heavy] i{background:var(--bad)}
.meter::after{content:"";position:absolute;left:66.66%;top:0;bottom:0;border-left:1px dashed rgba(255,255,255,.55)}
.meter-key{display:flex;justify-content:space-between;font-size:.82rem;color:var(--muted)}
.issues{list-style:none;padding:0;margin:1.2rem 0 0}
.issues li{padding:.6rem 0 .6rem 1.5rem;border-top:1px solid var(--line-soft);position:relative}
.issues li::before{content:"";position:absolute;left:.1rem;top:1.05rem;width:.6rem;height:.6rem;border-radius:50%;background:var(--muted)}
.issues li.problem::before{background:var(--bad)}.issues li.warning::before{background:var(--warn)}
.issues li b{display:block;font-size:.82rem;font-weight:600;color:var(--muted)}
.stock-add{display:grid;grid-template-columns:minmax(0,1fr) 5.5rem auto;gap:.6rem;align-items:end}
.stock-list{list-style:none;padding:0;margin:1rem 0 0}
.stock-list li{display:flex;align-items:center;gap:.5rem;padding:.5rem 0;border-top:1px solid var(--line-soft)}
.stock-list .nm{flex:1;min-width:0}
.stock-list .nm small{display:block;color:var(--muted);font-style:italic}
.stock-list .ct{min-width:1.8rem;text-align:center;font-weight:600}
.empty{color:var(--muted);padding:.8rem 0}

/* prose + footer */
.prose h2{margin:2.4rem 0 .7rem}.prose h2:first-child{margin-top:0}
.prose ul{padding-left:1.1rem;max-width:66ch}
.foot{border-top:1px solid var(--line);padding-block:2.2rem 3rem;color:var(--muted);font-size:.93rem}
.foot .wrap{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:2rem}
.foot h3{font:600 1rem var(--body);color:var(--text);margin-bottom:.5rem}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin-bottom:.3rem}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--lamp)}
@media (max-width:44rem){.foot .wrap{grid-template-columns:1fr}}

/* tank page top + photos */
.tank-top{border-bottom:1px solid var(--line-soft)}
.tank-top .drawing svg{max-width:100%;height:auto;min-width:32rem}
.two h2{margin-bottom:.9rem}
.photo{margin:0}
.photo img{width:100%;height:auto;border-radius:2px}
.fish .fits{columns:1}
.field:has(#preset){grid-column:1/-1;max-width:24rem}
.calc-top{margin-bottom:2.6rem}
.calc-top .tank-head{padding-bottom:2.2rem}

/* guides */
.ex li{align-items:flex-start}.ex li p{margin:.2rem 0 0}.ex li > span{padding-top:.1rem}
.prose-list{max-width:66ch;padding-left:1.1rem}.prose-list li{margin-bottom:.6rem}
@media (max-width:52rem){.two{grid-template-columns:minmax(0,1fr)}}
.ex li > div{min-width:0;flex:1}.ex li > span{flex:none}
.ex li p span{white-space:normal}
/* affiliate */
.gear a span{display:block}.aff-note{margin-top:1rem}