/* Cellsmith calculator pages + 404. Same system as the homepage: white canvas, mesh gradient, soft cards. */
:root{
  --bg:#fff;--bg2:#F6F7FB;--ink:#0B1020;--ink2:#2E3548;--muted:#646B7E;--line:#E7E9F0;--line2:#D9DCE6;
  --brand:#5B4BFF;--coral:#FF5A5F;--amber:#FFB020;--green:#12B76A;--cyan:#1FC3EE;
  --bad:#D92D3A;--bad-bg:#FFECEE;--warn:#B25E00;--warn-bg:#FFF3D9;--good:#0B8A50;--good-bg:#E2F6EC;
  --cell:#FFF4C2;--cell-line:#F2C230;
  --display:"Bricolage Grotesque",ui-sans-serif,system-ui,sans-serif;--sans:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;--mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  --r:22px;--ease:cubic-bezier(.2,.8,.2,1);--spring:cubic-bezier(.34,1.56,.64,1);
  --sh1:0 1px 2px rgba(16,24,40,.05),0 1px 3px rgba(16,24,40,.06);
  --sh2:0 2px 4px rgba(16,24,40,.04),0 12px 24px -6px rgba(16,24,40,.10),0 0 0 1px rgba(16,24,40,.05);
  --sh3:0 4px 8px rgba(16,24,40,.04),0 30px 60px -12px rgba(16,24,40,.22),0 18px 36px -18px rgba(16,24,40,.28),0 0 0 1px rgba(16,24,40,.06);
  color-scheme:light}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:clip;position:relative}
[hidden]{display:none!important}
a{color:inherit;text-decoration:none}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:8px}
::selection{background:var(--brand);color:#fff}
.wrap{width:min(1120px,100% - 40px);margin-inline:auto}
@media (max-width:520px){.wrap{width:calc(100% - 32px)}}
h1,h2,h3{font-family:var(--display);margin:0;letter-spacing:-.035em;line-height:1.02;font-weight:700;text-wrap:balance}

/* background */
.mesh{position:absolute;inset:-120px 0 auto;height:820px;z-index:-2;overflow:hidden;pointer-events:none;-webkit-mask-image:linear-gradient(#000 40%,transparent);mask-image:linear-gradient(#000 40%,transparent)}
.mesh b{position:absolute;border-radius:50%;filter:blur(70px);opacity:.45}
.mesh b:nth-child(1){width:520px;height:520px;left:5%;top:0;background:#8E7BFF;animation:m1 18s ease-in-out infinite alternate}
.mesh b:nth-child(2){width:460px;height:460px;right:5%;top:-40px;background:#FF8FA3;animation:m2 22s ease-in-out infinite alternate}
.mesh b:nth-child(3){width:420px;height:420px;left:40%;top:160px;background:#5EE2F0;opacity:.35;animation:m1 20s ease-in-out infinite alternate-reverse}
@keyframes m1{to{transform:translate(120px,60px) scale(1.15)}}
@keyframes m2{to{transform:translate(-140px,80px) scale(.9)}}
.cells{position:absolute;inset:0 0 auto;height:700px;z-index:-1;pointer-events:none;background-image:linear-gradient(rgba(11,16,32,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(11,16,32,.06) 1px,transparent 1px);background-size:96px 34px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 20%,#000 10%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 50% 20%,#000 10%,transparent 75%)}

/* nav */
.nav{position:sticky;top:max(12px,env(safe-area-inset-top));z-index:50;margin:12px auto 0;width:min(1120px,100% - 24px);display:flex;align-items:center;gap:8px;padding:8px 8px 8px 18px;border-radius:999px;background:rgba(255,255,255,.72);backdrop-filter:blur(18px) saturate(1.8);-webkit-backdrop-filter:blur(18px) saturate(1.8);box-shadow:0 0 0 1px rgba(16,24,40,.06),0 10px 30px -10px rgba(16,24,40,.18)}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:700;font-size:21px;letter-spacing:-.03em}
.mark{display:grid;grid-template-columns:repeat(2,10px);gap:2.5px;transition:transform .6s var(--spring)}
.mark i{width:10px;height:10px;border-radius:3px;background:var(--ink)}
.mark i:last-child{background:var(--coral)}
.logo:hover .mark{transform:rotate(90deg)}
.nlink{margin-left:auto;font-size:14.5px;font-weight:500;color:var(--ink2);padding:9px 14px;border-radius:999px;transition:background .2s}
.nlink:hover{background:rgba(16,24,40,.06)}
@media (max-width:520px){.nlink{display:none}.nav .btn{margin-left:auto}.logo{font-size:19px}}

/* buttons */
.btn{--bg:#fff;--fg:var(--ink);display:inline-flex;align-items:center;justify-content:center;gap:10px;height:50px;padding:0 22px;border-radius:999px;font-weight:600;font-size:15.5px;letter-spacing:-.01em;background:var(--bg);color:var(--fg);box-shadow:var(--sh1),inset 0 0 0 1px var(--line2);transition:transform .35s var(--spring),box-shadow .3s,background .2s;white-space:nowrap;cursor:pointer;border:0;font-family:inherit}
.btn:active{transform:scale(.97)}
.btn.dark{--bg:var(--ink);--fg:#fff;box-shadow:0 8px 20px -6px rgba(11,16,32,.45)}
.btn.dark:hover{--bg:#1A2140}
.btn.brand{--bg:var(--brand);--fg:#fff;box-shadow:0 10px 24px -8px rgba(91,75,255,.7)}
.btn.brand:hover{--bg:#4A3AF0}
.btn.sm{height:42px;padding:0 18px;font-size:14.5px}

/* top */
.top{padding-block:clamp(48px,7vw,84px) 36px}
.crumb{font-size:14px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumb a:hover{color:var(--ink)}
.crumb i{font-style:normal;color:var(--line2)}
h1{font-size:clamp(40px,6.4vw,76px);letter-spacing:-.045em;line-height:1;margin-top:18px;max-width:16ch}
h1 .w{display:inline-block;white-space:nowrap}
.lede{font-size:clamp(17px,1.8vw,20px);color:var(--ink2);max-width:38em;margin:20px 0 0;line-height:1.5}

/* calculator */
.calc{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:start;padding-bottom:64px}
@media (max-width:860px){.calc{grid-template-columns:1fr}}
.card{background:#fff;border-radius:var(--r);box-shadow:var(--sh3);overflow:hidden;min-width:0}
.card-h{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
.card-h b{color:var(--ink);font-weight:600}
.yk,.lv{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600}
.yk i{width:14px;height:14px;border-radius:4px;background:var(--cell);box-shadow:inset 0 -2px 0 var(--cell-line)}
.lv{color:var(--good);background:var(--good-bg);padding:4px 10px;border-radius:999px}
.lv i{width:7px;height:7px;border-radius:50%;background:var(--green);animation:ping 1.6s infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(18,183,106,.55)}80%,100%{box-shadow:0 0 0 7px rgba(18,183,106,0)}}
.row{display:grid;grid-template-columns:minmax(0,1fr) minmax(120px,180px);gap:12px;align-items:center;padding:12px 20px;border-bottom:1px solid var(--line)}
.row:last-child{border-bottom:0}
.row label{display:flex;flex-direction:column;font-weight:600;font-size:15px;line-height:1.35}
.row label small{color:var(--muted);font-size:13px;font-weight:400}
.row .in{display:flex;align-items:center;gap:6px;background:var(--cell);border-radius:12px;box-shadow:inset 0 -2px 0 var(--cell-line);padding:2px 12px 2px 4px;transition:box-shadow .2s,transform .25s var(--spring)}
.row .in:focus-within{box-shadow:inset 0 -2px 0 var(--cell-line),0 0 0 3px rgba(91,75,255,.3);transform:scale(1.03)}
.row input{width:100%;min-width:0;font:600 16px var(--mono);text-align:right;border:0;background:transparent;color:var(--ink);padding:10px 6px;outline:none}
.row input[type=text]{text-align:left;font-family:var(--sans)}
.row .sfx{font-size:13px;color:#8A6A00;white-space:nowrap;font-weight:600}
.row.pair{grid-template-columns:minmax(0,1fr) minmax(110px,160px)}
.row.pair .in:first-child{padding-left:8px}
.fx{display:flex;align-items:center;gap:10px;padding:10px 20px;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:13px;color:var(--ink2);background:var(--bg2);min-width:0}
.fx b{font-weight:600;color:var(--ink);background:#fff;padding:3px 8px;border-radius:6px;min-width:42px;text-align:center;box-shadow:var(--sh1)}
.fx em{font-style:italic;color:var(--brand);font-weight:600}
.fx span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.caret{display:inline-block;flex:none;width:2px;height:15px;background:var(--brand);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.out{padding:24px 20px}
.readout{font-family:var(--display);font-weight:700;font-size:clamp(60px,8vw,92px);letter-spacing:-.05em;line-height:.9;font-variant-numeric:tabular-nums;transition:color .3s}
.rlabel{color:var(--muted);margin-top:8px}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;line-height:1;padding:7px 12px 7px 10px;border-radius:999px;margin-top:14px}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.p-bad{color:var(--bad);background:var(--bad-bg)}.p-warn{color:var(--warn);background:var(--warn-bg)}.p-good{color:var(--good);background:var(--good-bg)}
.pop{animation:pop .55s var(--spring)}
@keyframes pop{0%{transform:scale(.6);opacity:.2}100%{transform:none;opacity:1}}
table.res{width:100%;border-collapse:collapse;margin-top:20px;font-variant-numeric:tabular-nums;font-size:15px}
table.res td{padding:10px 0;border-top:1px solid var(--line)}
table.res td:last-child{text-align:right;font-weight:600;font-family:var(--mono);font-size:14.5px}
td.flash{animation:flash .9s var(--ease)}
@keyframes flash{0%{background:#ECE9FF;color:var(--brand)}100%{background:transparent}}

/* prose + cta */
.prose{padding-block:clamp(40px,6vw,72px)}
.prose .wrap{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:clamp(24px,4vw,56px)}
@media (max-width:860px){.prose .wrap{grid-template-columns:1fr}}
h2{font-size:clamp(30px,3.6vw,44px);margin:0 0 16px}
.prose p{margin:0 0 14px;max-width:62ch;color:var(--ink2)}
.prose code{font-family:var(--mono);font-size:.9em;color:var(--brand);background:#F1EFFF;padding:2px 6px;border-radius:6px}
.cta{position:relative;align-self:start;border-radius:24px;padding:28px;display:grid;gap:12px;color:#fff;background:var(--ink);overflow:hidden;isolation:isolate}
.cta::before{content:"";position:absolute;inset:-40% -40% auto auto;width:360px;height:360px;z-index:-1;background:radial-gradient(closest-side,rgba(124,92,255,.65),transparent);filter:blur(10px)}
.cta::after{content:"";position:absolute;left:-60px;bottom:-80px;width:280px;height:280px;z-index:-1;background:radial-gradient(closest-side,rgba(255,90,95,.4),transparent);filter:blur(10px)}
.cta h3{font-size:28px}
.cta p{margin:0;color:rgba(255,255,255,.72);font-size:15px}
.cta .btn{justify-self:start;margin-top:6px}

/* tool list */
.more{padding-block:clamp(40px,6vw,72px) 80px}
.tlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.tlist a{position:relative;display:flex;flex-direction:column;gap:6px;padding:22px 56px 22px 22px;border-radius:var(--r);background:#fff;box-shadow:var(--sh2);transition:transform .45s var(--spring),box-shadow .3s;overflow:hidden}
.tlist a:hover{transform:translateY(-4px);box-shadow:var(--sh3)}
.tlist a b{font-family:var(--display);font-size:19px;letter-spacing:-.02em;line-height:1.2}
.tlist a span{font-size:14.5px;color:var(--muted);line-height:1.45}
.tlist .arr{position:absolute;right:18px;top:20px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--bg2);font-style:normal;transition:transform .4s var(--spring),background .3s,color .3s}
.tlist a:hover .arr{transform:rotate(-45deg);background:var(--ink);color:#fff}
.spot::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:0;transition:opacity .4s;background:radial-gradient(360px circle at var(--mx,50%) var(--my,50%),rgba(124,92,255,.10),transparent 45%)}
.spot:hover::after{opacity:1}

footer{padding:48px 0 calc(40px + env(safe-area-inset-bottom));color:var(--muted);font-size:14.5px;border-top:1px solid var(--line)}
.foot{display:flex;justify-content:space-between;gap:28px;flex-wrap:wrap;align-items:flex-start}
.foot nav{display:flex;gap:10px 22px;flex-wrap:wrap}
.foot nav a:hover{color:var(--ink)}
.foot p{margin:10px 0 0;max-width:24em}
.toast{position:fixed;left:50%;translate:-50% 0;bottom:calc(24px + env(safe-area-inset-bottom));z-index:90;background:var(--ink);color:#fff;font-weight:600;font-size:14.5px;padding:12px 18px;border-radius:999px;box-shadow:var(--sh3);animation:toast .5s var(--spring)}
@keyframes toast{from{opacity:0;transform:translateY(16px) scale(.95)}}

/* reveal */
.js [data-r]{opacity:0;transform:translateY(24px);filter:blur(6px);transition:opacity .8s var(--ease),transform .8s var(--ease),filter .8s var(--ease);transition-delay:calc(var(--d,0) * 70ms)}
.js [data-r].in{opacity:1;transform:none;filter:none}
.js h1 .w{opacity:0;transform:translateY(.4em) rotate(2deg);filter:blur(8px);transition:opacity .8s var(--ease),transform .9s var(--spring),filter .8s var(--ease);transition-delay:calc(var(--d) * 60ms + 80ms)}
.js .go h1 .w,.js h1.go .w{opacity:1;transform:none;filter:none}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;transition-delay:0s!important}}