/* Allele & Slide — a stained microscope slide: a frosted label end written in pencil, a square coverslip under which eosin pink spreads from one edge and the cell nuclei appear one by one, and Punnett-grid corners on the tool cards; Lexend for headings and ratios, like a clean lab label. */
:root,[data-theme="genetics-tools"]{
--color-primary:#dd66bb;--color-accent:#1f1a1d;--color-bg:#eef1ee;--color-bg-alt:#e2e7e2;
--color-text:#1f1a1d;--color-text-muted:#56525a;--color-border:#ccd3cc;
--card:#fbfcfb;--eosin:#dd66bb;--eosin-deep:#a83a88;--eosin-pale:#f6d9ee;--ink:#1f1a1d;--glass:#f4f8f6;--frost:#e7ebe8;
--radius-sm:4px;--radius-md:10px;
--font-display:"Lexend","Segoe UI","Helvetica Neue",Arial,sans-serif;
--font-base:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
--font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
*{box-sizing:border-box}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-base);-webkit-font-smoothing:antialiased}
a{color:var(--eosin-deep)}
:focus-visible{outline:3px solid var(--eosin-deep);outline-offset:3px}
/* nav */
.site-nav{background:var(--card);border-bottom:1px solid var(--color-border)}
.nav-container{position:relative;height:60px;max-width:1160px;margin:auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}
.nav-brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.nav-logo{height:34px}
.nav-site-name{font:600 21px/1 var(--font-display);color:var(--ink)}
.nav-links,.footer-links{display:flex;gap:22px;flex-wrap:wrap}
.nav-links a,.footer-links a{text-decoration:none;color:var(--color-text-muted);font:600 15px var(--font-base)}
.nav-links a:hover,.footer-links a:hover{color:var(--eosin-deep);text-decoration:underline;text-decoration-thickness:2px}
/* home */
.al-home{max-width:1160px;margin:auto;padding:0 20px 90px}
.al-hero{display:grid;grid-template-columns:minmax(0,1fr) 450px;gap:44px;align-items:center;margin:40px 0 44px;padding-bottom:40px;border-bottom:1px solid var(--color-border)}
.al-copy small{font:500 14px var(--font-display);letter-spacing:.12em;text-transform:uppercase;color:var(--eosin-deep)}
.al-copy h1{font:600 clamp(36px,4.8vw,60px)/1.06 var(--font-display);margin:12px 0 18px;color:var(--ink);letter-spacing:-.02em}
.al-copy h1 em{font-style:normal;color:var(--eosin-deep)}
.al-copy p{font-size:17px;line-height:1.7;color:var(--color-text-muted);max-width:54ch;margin:0}
.al-slide{position:relative;display:grid;grid-template-columns:118px 1fr;height:170px;border-radius:6px;background:linear-gradient(180deg,#ffffffcc,var(--glass));border:1px solid #b9c4bd;box-shadow:0 18px 30px #1f1a1d1f,inset 0 1px 0 #fff}
.al-label{display:flex;flex-direction:column;justify-content:center;gap:6px;padding:14px;background:repeating-linear-gradient(45deg,var(--frost) 0 2px,#eef1ef 2px 4px);border-right:1px solid #c7cfc9;border-radius:6px 0 0 6px;font:500 12px/1.3 var(--font-mono);color:#4b4650}
.al-label b{font:600 15px var(--font-display);color:var(--ink)}
.al-cover{position:relative;align-self:center;justify-self:center;width:136px;height:136px;border:1px solid #c2ccc5;background:#ffffff88;overflow:hidden}
.al-stain{position:absolute;inset:0;background:radial-gradient(circle at 30% 40%,#e98ccd 0 18%,transparent 19%),radial-gradient(circle at 70% 30%,#e47fc6 0 16%,transparent 17%),radial-gradient(circle at 55% 72%,#e98ccd 0 20%,transparent 21%),radial-gradient(circle at 20% 78%,#ea95d0 0 14%,transparent 15%),radial-gradient(circle at 86% 74%,#e47fc6 0 13%,transparent 14%),var(--eosin-pale);clip-path:inset(0 100% 0 0);animation:al-stain 1.8s cubic-bezier(.3,.2,.2,1) .3s forwards}
@keyframes al-stain{to{clip-path:inset(0 0 0 0)}}
.al-nuc{position:absolute;width:13px;height:11px;border-radius:50%;background:#3a2238;opacity:0;animation:al-nuc .35s ease-out forwards}
@keyframes al-nuc{from{opacity:0;transform:scale(.3)}to{opacity:.85;transform:scale(1)}}
.al-nuc:nth-child(2){left:24%;top:34%;animation-delay:1.3s}.al-nuc:nth-child(3){left:66%;top:24%;animation-delay:1.55s}.al-nuc:nth-child(4){left:50%;top:66%;animation-delay:1.8s}.al-nuc:nth-child(5){left:15%;top:72%;animation-delay:2.05s}.al-nuc:nth-child(6){left:82%;top:69%;animation-delay:2.3s}
.al-square{position:absolute;right:-18px;bottom:-26px;display:grid;grid-template-columns:repeat(3,38px);grid-template-rows:repeat(3,30px);background:var(--card);border:1px solid var(--color-border);box-shadow:0 10px 20px #1f1a1d1f;font:500 13px var(--font-display);text-align:center}
.al-square span{display:grid;place-items:center;border-right:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}
.al-square span.is-h{color:var(--eosin-deep);font-weight:600}
.al-square span.is-rec{background:var(--eosin-pale)}
.al-rail{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-bottom:10px;font:600 19px var(--font-display);color:var(--color-text-muted)}
.al-rail b{color:var(--ink)}
.al-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:14px}
.al-card{position:relative;display:flex;flex-direction:column;padding:22px 22px 20px;background:var(--card);border:1px solid var(--color-border);border-radius:var(--radius-md);text-decoration:none;color:inherit;overflow:hidden;transition:transform .16s,box-shadow .16s}
.al-card::after{content:"";position:absolute;top:0;right:0;width:30px;height:30px;background:linear-gradient(var(--color-border),var(--color-border)) 50% 0/1px 100% no-repeat,linear-gradient(var(--color-border),var(--color-border)) 0 50%/100% 1px no-repeat,linear-gradient(var(--eosin-pale),var(--eosin-pale)) 100% 100%/50% 50% no-repeat;border-left:1px solid var(--color-border);border-bottom:1px solid var(--color-border);border-bottom-left-radius:4px}
.al-card:hover{transform:translateY(-3px);box-shadow:0 14px 28px #1f1a1d1c}
.al-sym{align-self:flex-start;padding:2px 10px;border-radius:20px;background:var(--eosin-pale);font:500 16px var(--font-display);color:var(--eosin-deep)}
.al-card h2{font:600 20px/1.2 var(--font-display);margin:12px 0 8px;color:var(--ink);letter-spacing:-.01em}
.al-card p{margin:0 0 16px;font-size:14px;line-height:1.65;color:var(--color-text-muted);flex:1}
.al-open{font:700 14px var(--font-base);color:var(--eosin-deep)}
.al-note{margin-top:34px;padding:16px 18px;border-left:6px solid var(--eosin);border-radius:var(--radius-sm);background:var(--card);font-size:14px;line-height:1.7;color:var(--color-text-muted)}
/* detail */
.ald-page{max-width:1080px;margin:auto;padding:24px 20px 90px}
.ald-crumb{font-size:13px;color:var(--color-text-muted)}
.ald-crumb a{text-decoration:none;font-weight:700}
.ald-head{max-width:800px;padding:30px 0 24px}
.ald-kicker{display:inline-block;font:500 13px var(--font-display);letter-spacing:.16em;color:var(--eosin-deep)}
.ald-head h1{font:600 clamp(32px,4.4vw,52px)/1.08 var(--font-display);margin:12px 0 14px;color:var(--ink);letter-spacing:-.02em}
.ald-head p{font-size:18px;line-height:1.7;color:var(--color-text-muted);margin:0}
.ald-tool{background:var(--card);border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;margin:14px 0 50px;box-shadow:0 16px 34px #1f1a1d14}
.ald-tool-label{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:12px 24px;background:var(--eosin-pale);border-bottom:1px solid #e9bfdc;color:var(--ink);font:600 18px var(--font-display)}
.ald-tool-label i{flex:0 0 74px;height:22px;border:1px solid #c2ccc5;border-radius:3px;background:linear-gradient(90deg,var(--frost) 0 30%,transparent 30%),radial-gradient(circle at 62% 50%,var(--eosin) 0 4px,transparent 5px),radial-gradient(circle at 82% 45%,var(--eosin) 0 3px,transparent 4px),#fff}
.ald-tool-body{padding:28px}
.ald-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:56px}
.ald-reading{font-size:17px;line-height:1.8}
.ald-reading h2{font:600 26px/1.2 var(--font-display);margin:36px 0 12px;color:var(--ink);letter-spacing:-.01em}
.ald-reading p{margin:0 0 14px}
.ald-reading ol,.ald-reading ul{margin:0 0 16px;padding-left:22px}
.ald-reading ol{list-style:decimal}.ald-reading ul{list-style:disc}
.ald-reading li{margin-bottom:7px}
.ald-side{position:relative;align-self:start;background:var(--card);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;color:var(--color-text-muted);font-size:14px;line-height:1.65}
.ald-side strong{display:block;color:var(--ink);font:600 17px var(--font-display);margin-bottom:6px}
.ald-side a{display:inline-block;margin-top:12px;font-weight:700;text-decoration:none;color:var(--eosin-deep)}
.ald-side a:hover{text-decoration:underline}
.ald-index{margin-top:20px;border-top:1px solid var(--color-border);padding-top:14px}
.ald-index ul{list-style:none;margin:10px 0 0;padding:0}
.ald-index li{padding:6px 0;font-size:13px}
.ald-index a{display:block;margin:0;font-weight:400;color:var(--color-text)}
.ald-index span[aria-current]{font-weight:700;color:var(--eosin-deep)}
.ald-faq,.ald-related{margin-top:56px}
.ald-faq h2,.ald-related h2{font:600 26px var(--font-display);margin:0 0 16px;color:var(--ink)}
.ald-faq details{border-bottom:1px solid var(--color-border);padding:15px 0}
.ald-faq summary{cursor:pointer;font-weight:700}
.ald-faq p{color:var(--color-text-muted);line-height:1.75}
.ald-related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ald-related-card{display:block;background:var(--card);padding:18px 20px 20px;border:1px solid var(--color-border);border-top:5px solid var(--eosin);border-radius:var(--radius-md);text-decoration:none;color:inherit;transition:transform .16s}
.ald-related-card:hover{transform:translateY(-3px)}
.ald-related-card h3{font:600 17px/1.25 var(--font-display);margin:0 0 8px;color:var(--ink)}
.ald-related-card p{font-size:14px;line-height:1.6;color:var(--color-text-muted);margin:0 0 12px}
.ald-related-card span{font:700 14px var(--font-base);color:var(--eosin-deep)}
.ald-disclaimer{margin:44px 0 0;padding:16px 18px;border-left:6px solid var(--eosin);border-radius:var(--radius-sm);background:var(--card);font-size:14px;line-height:1.7;color:var(--color-text-muted)}
.site-footer{background:var(--card);border-top:1px solid var(--color-border);padding:32px 20px;text-align:center}
.footer-copyright{margin-top:14px;font-size:12px;color:var(--color-text-muted)}
/* tool surface */
[data-theme="genetics-tools"] .tool-row{gap:16px;margin-bottom:18px}
[data-theme="genetics-tools"] .tool-field{font-size:13px;font-weight:700;color:var(--color-text-muted);gap:7px}
[data-theme="genetics-tools"] .tool-input,[data-theme="genetics-tools"] .tool-textarea{border:1.5px solid var(--color-border);border-radius:var(--radius-sm);background:#fff;padding:10px 12px;font:16px/1.4 var(--font-base);color:var(--color-text)}
[data-theme="genetics-tools"] input[type="text"].tool-input{font:500 17px/1.4 var(--font-mono);letter-spacing:.04em}
[data-theme="genetics-tools"] .tool-input:focus{outline:0;border-color:var(--eosin-deep);box-shadow:0 0 0 3px #dd66bb40}
[data-theme="genetics-tools"] .tool-btn{border-radius:var(--radius-sm);font:700 14px var(--font-base)}
[data-theme="genetics-tools"] .tool-btn-primary{background:var(--eosin);color:var(--ink);border:0}
[data-theme="genetics-tools"] .tool-result-box{margin-top:22px;padding:22px;border-radius:var(--radius-sm);background:#fff;border:1px solid var(--color-border);border-top:5px solid var(--eosin);font-size:15px;word-break:normal}
[data-theme="genetics-tools"] .tool-stat-hero{margin:0 0 8px;font:600 clamp(32px,5.6vw,50px)/1.08 var(--font-display);color:var(--ink);letter-spacing:-.02em;overflow-wrap:anywhere}
[data-theme="genetics-tools"] .tool-unit{display:inline-block;margin-left:12px;font:600 15px var(--font-base);letter-spacing:0;color:var(--eosin-deep);vertical-align:middle}
[data-theme="genetics-tools"] .tool-hint{font-size:14px;line-height:1.7;color:var(--color-text-muted);margin:8px 0 0}
[data-theme="genetics-tools"] .tool-hint strong{color:var(--ink)}
[data-theme="genetics-tools"] .tool-scroll{overflow-x:auto;margin-top:14px}
[data-theme="genetics-tools"] .tool-table td,[data-theme="genetics-tools"] .tool-table th{font-size:14px;background:#fff}
[data-theme="genetics-tools"] .tool-table th{background:var(--ink);color:#fff}
[data-theme="genetics-tools"] .tool-punnett td,[data-theme="genetics-tools"] .tool-punnett th{text-align:center;font-family:var(--font-mono)}
[data-theme="genetics-tools"] .tool-punnett tbody th{background:var(--eosin-pale);color:var(--ink)}
[data-theme="genetics-tools"] .tool-seq{font-family:var(--font-mono);overflow-wrap:anywhere}
@media(max-width:960px){
.al-grid,.ald-related-grid{grid-template-columns:repeat(2,1fr)}
.al-hero{grid-template-columns:minmax(0,1fr) 360px;gap:28px}
.al-slide{grid-template-columns:90px 1fr}
}
@media(max-width:768px){
.al-hero{display:none}
.al-home{padding:24px 16px 60px}
.al-grid,.ald-related-grid{grid-template-columns:1fr}
.ald-head{padding-top:22px}
.ald-layout{grid-template-columns:1fr;gap:28px}
.ald-tool-body{padding:20px 16px}
.ald-tool-label{padding:12px 16px}
}
@media(prefers-reduced-motion:reduce){
.al-stain{animation:none;clip-path:none}
.al-nuc{animation:none;opacity:.85}
.al-card:hover,.ald-related-card:hover{transform:none}
}
[data-theme="genetics-tools"] .static-page-container a{color:var(--eosin-deep)}
[data-theme="genetics-tools"] .guide-breadcrumb a,[data-theme="genetics-tools"] .guide-index-link{color:var(--eosin-deep)}