:root{
  /* dark ocean theme — muted, easy on the eyes */
  --bg:#0f2a3c;            /* page background (soft dark ocean blue) */
  --surface:#163a52;       /* cards */
  --surface-2:#1a4159;     /* inputs, stock items */
  --surface-3:#22516c;     /* bars bg, table headers */
  --line:#2a5872;          /* borders */
  --line-soft:#21465e;
  --ink:#e7f0f5;           /* main text (soft white) */
  --ink-soft:#c2d6e0;
  --muted:#8fabbb;
  --teal:#3ac6cb;          /* links / accents (bright on dark) */
  --teal-d:#19a3a8;        /* buttons */
  --teal-l:rgba(58,198,203,.14);
  --coral:#ef8159;--coral-d:#e2683f;
  --deep:#0a2336;--deep-2:#0e3a5e;--deep-3:#155a82;
  --good:#4ade80;--good-bg:rgba(74,222,128,.13);
  --warn:#f5c344;--warn-bg:rgba(245,195,68,.13);
  --bad:#f47171;--bad-bg:rgba(244,113,113,.14);
  --radius:14px;--radius-sm:9px;--max:1080px;--narrow:760px;
  --serif:'Lora',Georgia,'Times New Roman',serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --shadow:0 1px 2px rgba(0,0,0,.18),0 10px 28px rgba(0,0,0,.22);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.25rem}
.narrow{max-width:var(--narrow);margin-left:auto;margin-right:auto}
a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--serif);color:#fff;line-height:1.2;font-weight:600}
h1{font-size:2.5rem;letter-spacing:-.01em;margin:.2rem 0 .5rem}
h2{font-size:1.7rem;margin:2.2rem 0 .7rem}
h3{font-size:1.2rem;font-family:var(--sans);font-weight:700;margin:1.4rem 0 .4rem;color:var(--ink)}
p{margin:.7rem 0}
.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;background:#fff;color:#000;padding:.5rem;z-index:99}
/* top accent + header */
body{border-top:4px solid transparent;border-image:linear-gradient(90deg,var(--teal),var(--deep-3),var(--coral)) 1}
header.nav{background:#0c2638;border-bottom:1px solid var(--line-soft);position:sticky;top:0;z-index:20}
.nav-in{display:flex;align-items:center;gap:1.5rem;max-width:var(--max);margin:0 auto;padding:.85rem 1.25rem;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:.55rem;font-family:var(--serif);font-weight:700;font-size:1.35rem;color:#fff}
.logo:hover{text-decoration:none}
.logo svg{width:30px;height:30px;flex:none}
.nav-links{display:flex;gap:1.4rem;flex-wrap:wrap;margin-left:auto;list-style:none;padding:0;font-size:.95rem;font-weight:500}
.nav-links a{color:var(--ink-soft)}.nav-links a:hover{color:var(--teal);text-decoration:none}
/* hero band (a touch richer/lighter than the page, reads as a banner) */
.hero{position:relative;margin:1.5rem 0 0;padding:3rem 1.5rem 3.4rem;border-radius:18px;background:radial-gradient(120% 150% at 50% -10%,var(--deep-3),var(--deep) 72%);color:#eaf6f7;text-align:center;overflow:hidden;border:1px solid var(--line-soft)}
.hero .tag{display:inline-block;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);color:#bfe8e8;font-size:.78rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:.35rem .85rem;border-radius:99px}
.hero h1{color:#fff;font-size:2.9rem;margin:1rem auto .6rem;max-width:18ch}
.hero p.sub{color:#bcd6db;max-width:60ch;margin:.3rem auto 0;font-size:1.12rem}
@media(max-width:560px){h1{font-size:2rem}.hero h1{font-size:2.1rem}}
.lift{margin-top:-2.2rem;position:relative;z-index:2}
/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.1rem;margin:1.6rem 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem;box-shadow:var(--shadow)}
.card h3{margin:.1rem 0 .4rem}.card p{color:var(--ink-soft);font-size:.96rem;margin:.2rem 0 1rem}
.btn{display:inline-block;background:var(--teal-d);color:#04232a;font-weight:700;padding:.6rem 1.15rem;border-radius:var(--radius-sm)}
.btn:hover{background:var(--teal);text-decoration:none}
/* species photo gallery */
.prose.photos{max-width:var(--max)}
.fish-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(155px,1fr));gap:1rem;margin:1.1rem 0 .6rem}
.fish-card{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow)}
.fish-card img{width:100%;height:140px;object-fit:cover;display:block;background:var(--surface-3)}
.fish-card figcaption{padding:.55rem .7rem}
.fish-name{display:block;font-weight:700;font-size:.95rem;color:var(--ink);line-height:1.3}
.fish-cred{display:block;font-size:.7rem;color:var(--muted);margin-top:.2rem}
.fish-cred:hover{color:var(--teal)}
/* calculator */
.fa-calc{background:#1f5070;border:1px solid #2e6286;border-radius:var(--radius);padding:1.4rem;box-shadow:0 2px 4px rgba(0,0,0,.2),0 14px 36px rgba(0,0,0,.28)}
.fa-row{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:.9rem}
.fa-calc label{display:flex;flex-direction:column;font-size:.8rem;color:var(--muted);font-weight:600;letter-spacing:.02em;text-transform:uppercase;gap:.35rem;flex:1;min-width:160px}
.fa-calc input,.fa-calc select{background:var(--surface-2);border:1px solid var(--line);color:var(--ink);border-radius:var(--radius-sm);padding:.65rem;font-size:1rem;font-family:var(--sans)}
.fa-calc input:focus,.fa-calc select:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px var(--teal-l)}
.fa-calc select option{color:#0f2a3c;background:#fff}
.fa-stock-list{list-style:none;padding:0;margin:.5rem 0}
.fa-stock-item{display:flex;justify-content:space-between;align-items:center;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:.5rem .8rem;margin:.4rem 0;font-weight:500}
.fa-qty{display:flex;align-items:center;gap:.55rem}
.fa-qty button{width:30px;height:30px;border-radius:7px;border:1px solid var(--line);background:var(--surface-3);color:var(--ink);font-size:1.05rem;cursor:pointer;line-height:1}
.fa-qty button:hover{border-color:var(--teal);color:var(--teal)}
.fa-qty .fa-rm{color:var(--bad);border-color:#5b2f3a}.fa-qty .fa-rm:hover{background:var(--bad-bg)}
.fa-muted{color:var(--muted)}
.fa-result{margin-top:1.1rem}
.fa-score{font-family:var(--serif);font-size:2.6rem;font-weight:700;text-align:center;padding:.8rem;border-radius:var(--radius-sm);margin:.4rem 0}
.fa-score span{display:block;font-family:var(--sans);font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;opacity:.85;margin-top:.2rem}
.fa-score.good{background:var(--good-bg);color:var(--good)}
.fa-score.warnc{background:var(--warn-bg);color:var(--warn)}
.fa-score.bad{background:var(--bad-bg);color:var(--bad)}
.fa-bar-row{margin:.55rem 0}.fa-bar-label{font-size:.85rem;color:var(--ink-soft);margin-bottom:.25rem}
.fa-bar{height:11px;background:rgba(0,0,0,.28);border-radius:99px;overflow:hidden}
.fa-bar-fill{display:block;height:100%;border-radius:99px}.fa-bar-fill.good{background:var(--good)}.fa-bar-fill.warnc{background:var(--warn)}.fa-bar-fill.bad{background:var(--bad)}
.fa-warnings{margin:.9rem 0}
.fa-warn{padding:.6rem .85rem;border-radius:var(--radius-sm);margin:.45rem 0;font-size:.94rem;border-left:3px solid;background:var(--surface-2);color:var(--ink)}
.fa-warn.fa-error{background:var(--bad-bg);border-color:var(--bad)}
.fa-warn.fa-warn{background:var(--warn-bg);border-color:var(--warn)}
.fa-warn.fa-info{background:var(--teal-l);border-color:var(--teal)}
.fa-warn.fa-ok{background:var(--good-bg);border-color:var(--good)}
.fa-method{font-size:.84rem;color:var(--muted);border-top:1px solid var(--line);padding-top:.8rem;margin-top:1.1rem}
.fa-gear{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:1.1rem;margin:1.1rem 0}
.fa-gear h3{margin-top:0}.fa-gear ul{margin:.4rem 0;padding-left:1.15rem}.fa-gear li{margin:.4rem 0}
.fa-disclosure{font-size:.78rem;color:var(--muted);font-style:italic}
.fa-out{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:1.1rem;margin-top:1rem;font-size:1.05rem}
.fa-out strong{color:var(--teal)}
/* content */
main{padding:0 0 3rem}
.prose{max-width:var(--narrow)}
.prose p,.prose li{color:var(--ink-soft)}
section.prose,.related{max-width:var(--narrow)}
.related{border-top:1px solid var(--line);margin-top:2.4rem;padding-top:1.2rem}
.related ul{columns:2;column-gap:2rem;padding-left:1.15rem}
table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.95rem}
th,td{border:1px solid var(--line);padding:.55rem .65rem;text-align:left}th{background:var(--surface-3);font-family:var(--sans)}
main > .wrap > h1{margin-top:1.6rem}
/* footer */
footer{background:#0a2032;color:#9fc0c6;margin-top:2.5rem;padding:2.2rem 0 1.6rem;font-size:.92rem;border-top:1px solid var(--line-soft)}
footer a{color:#bcd6da}footer a:hover{color:#fff}
footer h4{font-family:var(--sans);color:#fff;margin:0 0 .6rem;font-size:.85rem;letter-spacing:.05em;text-transform:uppercase}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1.4rem}
.foot-grid ul{list-style:none;padding:0;margin:0}.foot-grid li{margin:.3rem 0}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:1.4rem;padding-top:1.1rem;text-align:center;font-size:.84rem;color:#7fa3aa}
@media(max-width:560px){.related ul{columns:1}.hero{padding-top:2.2rem;padding-bottom:2.6rem}}