@font-face{font-family:"Outfit";src:url("/assets/fonts/outfit-var-latin.woff2") format("woff2");font-weight:300 900;font-display:swap}
:root{--ink:#0B2E33;--ink-2:#36585c;--teal:#0D6E78;--teal-2:#14B8A6;--sea:#E6F6F3;--sun:#FFD166;--paper:#F7FBFA;--line:#D5E7E4;--white:#fff;--r:20px;--max:1120px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--teal)}
a:hover{color:var(--ink)}
h1,h2,h3,.display{font-family:"Outfit",system-ui,sans-serif;line-height:1.08;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.6rem,9vw,5rem);font-weight:850}
h2{font-size:clamp(1.9rem,5.5vw,3rem);font-weight:800}
h3{font-size:1.3rem;font-weight:750;letter-spacing:-.01em}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;border-radius:8px;z-index:9}
/* header */
.site-head{position:sticky;top:0;z-index:5;background:rgba(247,251,250,.92);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;height:64px}
.brand{display:flex;align-items:center}
.brand img{height:36px;width:auto}
.nav{display:flex;gap:4px;align-items:center}
.nav a{font-weight:600;text-decoration:none;color:var(--ink);padding:8px 10px;border-radius:10px;font-size:.95rem}
.nav a:hover,.nav a[aria-current=page]{background:var(--sea);color:var(--teal)}
@media (max-width:560px){.brand img{height:30px}.nav a.hide-sm{display:none}.nav a{padding:8px 8px;font-size:.9rem}}
/* buttons + badges */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;text-decoration:none;border-radius:999px;padding:14px 22px;font-size:1rem;border:2px solid transparent}
.btn-primary{background:var(--ink);color:#fff}.btn-primary:hover{background:var(--teal);color:#fff}
.btn-ghost{border-color:var(--ink);color:var(--ink)}.btn-ghost:hover{background:var(--ink);color:#fff}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 10px}
.badge{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:#fff;border-radius:14px;padding:10px 16px;line-height:1.15}
.badge svg{width:22px;height:22px;flex:none}
.badge small{display:block;font-size:.72rem;opacity:.75;letter-spacing:.02em;text-transform:uppercase}
.badge b{font-family:"Outfit",sans-serif;font-size:1.1rem}
.note{font-size:.9rem;color:var(--ink-2)}
/* hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#0D6E78 0%,#14B8A6 100%);color:#fff}
.hero .wrap{display:grid;grid-template-columns:1fr;gap:36px;padding-top:48px;padding-bottom:96px;align-items:center}
@media (min-width:900px){.hero .wrap{grid-template-columns:1.15fr .85fr;padding-top:72px;padding-bottom:120px}}
.hero h1{color:#fff}
.hero h1 em{font-style:normal;color:var(--sun)}
.hero .lede{font-size:clamp(1.1rem,2.6vw,1.3rem);max-width:34em;color:#EFFFFB}
.hero .badge{background:#fff;color:var(--ink)}
.hero .note{color:#D8F5EF}
.hero .note a{color:#fff}
.kicker{display:inline-block;font-weight:700;font-size:.85rem;letter-spacing:.08em;text-transform:uppercase;background:rgba(255,255,255,.16);border-radius:999px;padding:6px 12px;margin-bottom:18px}
.wave-edge{position:absolute;left:0;right:0;bottom:-1px;height:60px;width:100%}
/* share card illustration */
.card-demo{justify-self:center;width:min(340px,100%);background:#fff;color:var(--ink);border-radius:28px;padding:22px;box-shadow:0 24px 60px rgba(5,40,45,.35);transform:rotate(2deg)}
.card-demo .top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.card-demo .top img{height:26px;width:auto}
.tag{font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:var(--sea);color:var(--teal);border-radius:999px;padding:4px 10px}
.card-demo .item{font-family:"Outfit",sans-serif;font-weight:700;font-size:1.15rem;margin-bottom:12px}
.card-demo .row{display:flex;justify-content:space-between;padding:10px 0;border-top:1px solid var(--line)}
.card-demo .profit{display:flex;justify-content:space-between;align-items:baseline;background:var(--sun);border-radius:16px;padding:12px 16px;margin-top:10px;font-family:"Outfit",sans-serif;font-weight:800}
.card-demo .profit span:last-child{font-size:2rem}
.card-demo .hash{margin-top:12px;font-weight:700;color:var(--teal)}
/* sections */
section{padding:72px 0}
.section-sea{background:var(--sea)}
.section-ink{background:var(--ink);color:#EAF6F4}
.section-ink h2,.section-ink h3{color:#fff}
.section-ink a{color:var(--sun)}
.eyebrow{font-weight:800;font-size:.85rem;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin-bottom:10px}
.section-ink .eyebrow{color:var(--sun)}
.intro{max-width:40em;font-size:1.1rem;color:var(--ink-2)}
.section-ink .intro{color:#CDE6E2}
.grid{display:grid;gap:18px;grid-template-columns:1fr}
@media (min-width:720px){.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}}
.tile{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.section-ink .tile{background:#123d43;border-color:#1f5258}
.step-n{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--ink);color:var(--sun);font-family:"Outfit",sans-serif;font-weight:800;font-size:1.3rem;margin-bottom:14px}
.tile p:last-child{margin-bottom:0}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 0;padding:0;list-style:none}
.chips li{background:var(--sea);color:var(--teal);font-weight:600;font-size:.85rem;border-radius:999px;padding:4px 12px}
.challenge{position:relative;overflow:hidden}
.challenge .lvl{font-size:.8rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--teal)}
.challenge h3{font-size:1.6rem;margin-top:6px}
.challenge .meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:.92rem;color:var(--ink-2);margin-top:8px}
.section-ink .challenge .lvl{color:var(--sun)}
.grade{display:flex;gap:16px;align-items:flex-start}
.grade .g{flex:none;display:grid;place-items:center;width:56px;height:56px;border-radius:16px;font-family:"Outfit",sans-serif;font-weight:850;font-size:1.8rem;color:var(--ink)}
.g-a{background:#B8F0E4}.g-b{background:var(--sun)}.g-c{background:#FFC2AE}
.cta-band{text-align:center}
.cta-band .badges{justify-content:center}
.split{display:grid;gap:32px;align-items:center}
@media (min-width:860px){.split{grid-template-columns:1fr 1fr}}
.ticks{list-style:none;padding:0;margin:0 0 1em}
.ticks li{position:relative;padding-left:32px;margin-bottom:10px}
.ticks li::before{content:"";position:absolute;left:0;top:.35em;width:20px;height:20px;border-radius:50%;background:var(--teal-2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='%23fff' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/20px no-repeat}
/* pricing */
.price .amount{font-family:"Outfit",sans-serif;font-weight:850;font-size:2.4rem;letter-spacing:-.03em;line-height:1;margin:8px 0 6px}
.price .amount span{font-size:1rem;font-weight:650;color:var(--ink-2);letter-spacing:0}
.price .or{color:var(--ink-2);margin:0 0 14px}
.price.featured{border-color:var(--teal);box-shadow:0 0 0 2px var(--teal)}
.price .ticks{margin-top:8px}
/* prose pages */
.page-head{background:linear-gradient(180deg,#0D6E78,#14B8A6);color:#fff;padding:56px 0 64px;position:relative;overflow:hidden}
.page-head h1{color:#fff;font-size:clamp(2.3rem,7vw,4rem)}
.page-head p{max-width:38em;font-size:1.15rem;color:#EFFFFB;margin:0}
.prose{max-width:760px;margin:0 auto;padding:56px 20px 72px}
.prose h2{font-size:clamp(1.5rem,4vw,2rem);margin-top:1.6em}
.prose h2:first-child{margin-top:0}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin-bottom:.4em}
.updated{font-size:.9rem;color:var(--ink-2)}
details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 20px;margin-bottom:10px}
summary{cursor:pointer;font-family:"Outfit",sans-serif;font-weight:700;font-size:1.12rem;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:1.4rem;line-height:1;color:var(--teal)}
details[open] summary::after{content:"–"}
details>div{padding-bottom:16px}
details>div p:last-child{margin-bottom:0}
.callout{background:var(--sea);border-left:5px solid var(--teal-2);border-radius:12px;padding:16px 18px;margin:1.2em 0}
/* footer */
.site-foot{background:var(--ink);color:#BFD9D5;padding:48px 0 40px;font-size:.95rem}
.site-foot .wrap{display:grid;gap:24px}
@media (min-width:760px){.site-foot .wrap{grid-template-columns:1.4fr 1fr}}
.site-foot img{height:34px;width:auto;margin-bottom:12px}
.site-foot a{color:#fff;text-decoration:none}
.site-foot a:hover{text-decoration:underline}
.foot-links{display:flex;flex-wrap:wrap;gap:10px 20px;list-style:none;padding:0;margin:0}
.fine{font-size:.85rem;color:#8FB3AE;margin-top:8px}
/* 404 */
.lost{min-height:60vh;display:grid;place-items:center;text-align:center;padding:64px 20px}
.lost img{width:120px;margin:0 auto 20px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card-demo{transform:none}}