:root{--bg:#fff;--ink:#0b1220;--mut:#5b6678;--line:#e6e9f0;--card:#fff;--soft:#f5f7fb;--a:#2563eb;--b:#06b6d4;--grad:linear-gradient(135deg,#2563eb,#06b6d4);--sh:0 1px 2px rgba(16,24,40,.05),0 10px 36px rgba(16,24,40,.07)}
html{color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:17px/1.7 Inter,system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;color:var(--ink);background-color:#fff;background-image:radial-gradient(60% 380px at 85% -60px,rgba(37,99,235,.14),transparent),radial-gradient(50% 340px at 5% -40px,rgba(6,182,212,.14),transparent);background-repeat:no-repeat;padding:env(safe-area-inset-top) 0 env(safe-area-inset-bottom);-webkit-font-smoothing:antialiased}
h1,h2,h3{line-height:1.15;letter-spacing:-.03em;font-weight:750;margin:0}
h1{font-size:clamp(2.3rem,7vw,4.1rem);font-weight:800;letter-spacing:-.045em}
h2{font-size:clamp(1.6rem,4vw,2.2rem);margin:2.6em auto .5em}h3{font-size:1.15rem;margin-bottom:.4em}
a{color:var(--a)}p{margin:.8em 0}.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.85);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:66px}
.logo{font-weight:800;font-size:1.25rem;letter-spacing:-.04em;color:var(--ink);text-decoration:none}.logo b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
nav{display:flex;gap:2px;align-items:center;overflow-x:auto;scrollbar-width:none}nav::-webkit-scrollbar{display:none}
nav a{color:var(--mut);text-decoration:none;padding:8px 14px;border-radius:999px;font-size:.93rem;font-weight:500;white-space:nowrap;transition:.15s}
nav a:hover,nav a[aria-current]{color:var(--ink);background:var(--soft)}
nav a.free{background:var(--grad);color:#fff;font-weight:600;margin-left:6px}
@media(max-width:700px){header .wrap{flex-wrap:wrap;padding-bottom:8px;padding-top:8px}nav{width:100%}}
main{padding-bottom:30px}
.hero{text-align:center;padding:64px 0 26px;max-width:780px;margin:0 auto}
.hero p{color:var(--mut);font-size:1.15rem;max-width:620px;margin:18px auto 0}
.pill{display:inline-block;padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:var(--card);box-shadow:var(--sh);font-size:.85rem;font-weight:600;margin-bottom:22px}
.price{font-size:5.5rem;font-weight:800;letter-spacing:-.06em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.1;margin-top:10px}
.tool{max-width:760px;margin:26px auto;background:var(--card);border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:var(--sh)}
.tabs{display:flex;gap:4px;background:var(--soft);padding:5px;border-radius:16px;margin-bottom:10px;overflow-x:auto}
button{font:inherit;cursor:pointer}
.tab{flex:1;white-space:nowrap;border:0;background:transparent;color:var(--mut);padding:10px 14px;border-radius:12px;font-weight:600;font-size:.92rem}
.tab.on{background:var(--card);color:var(--ink);box-shadow:0 1px 3px rgba(16,24,40,.15)}
.panel{display:none}.panel.on{display:block}
.row{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
label{display:block;font-weight:600;font-size:.92rem;margin-top:18px}
.chip{border:1px solid var(--line);background:var(--card);color:var(--ink);padding:8px 16px;border-radius:999px;font-weight:500;transition:.15s}
.chip:hover{border-color:var(--a)}.chip.on{background:var(--grad);color:#fff;border-color:transparent}
input[type=range]{width:100%;accent-color:var(--a);height:28px}
.go{width:100%;margin-top:22px;padding:17px;border:0;border-radius:16px;background:var(--grad);color:#fff;font-weight:700;font-size:1.05rem;box-shadow:0 10px 28px rgba(37,99,235,.35);transition:transform .15s}
.go:hover{transform:translateY(-1px)}.go.run{background:linear-gradient(135deg,#f43f5e,#f97316);box-shadow:0 10px 28px rgba(244,63,94,.35)}
:focus-visible{outline:3px solid var(--b);outline-offset:2px}
main>p,main>ol,main>ul,main>h2,main>h3,main>details{max-width:720px;margin-left:auto;margin-right:auto}
main>ol,main>ul{padding-left:0}main>h2{display:block}
ol{list-style:none;counter-reset:s;padding:0}
ol li{counter-increment:s;position:relative;padding:16px 18px 16px 62px;margin:10px 0;background:var(--card);border:1px solid var(--line);border-radius:18px}
ol li::before{content:counter(s);position:absolute;left:16px;top:14px;width:32px;height:32px;border-radius:10px;background:var(--grad);color:#fff;font-weight:700;display:grid;place-items:center}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin:22px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:var(--sh);transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-3px);border-color:var(--a)}.card h3{margin-top:0}.card a{color:inherit;text-decoration:none}.card p{color:var(--mut);margin-bottom:0}
.card .meta{color:var(--a);font-weight:600;margin-top:14px}
details{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:4px 20px;margin:10px auto}
summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::after{content:'+';font-size:1.4rem;line-height:1;color:var(--a)}details[open] summary::after{content:'–'}summary::-webkit-details-marker{display:none}
details p{color:var(--mut);margin-top:0}
main>div[style]{max-width:720px;margin:auto;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--card)}
table{width:100%;border-collapse:collapse;font-size:.95rem}th{background:var(--soft);text-align:left;font-weight:600}td,th{padding:13px 16px;border-bottom:1px solid var(--line);text-align:left}tr:last-child td{border-bottom:0}
.note{background:var(--soft);border:1px solid var(--line);padding:12px 16px;border-radius:14px;font-size:.95rem}
.crumb{font-size:.88rem;color:var(--mut);margin:30px auto 0;max-width:720px}.crumb a{color:var(--mut)}
.meta{color:var(--mut);font-size:.9rem}
article{max-width:720px;margin:0 auto}article h1{font-size:clamp(2rem,5.5vw,3rem);margin:14px 0 6px}article h2{margin:2em 0 .4em;font-size:1.6rem}article p,article li{font-size:1.07rem}
.cta{background:var(--grad);color:#fff;border-radius:26px;padding:36px 24px;margin:44px 0;text-align:center}
.cta p{font-size:1.25rem;margin:0 0 16px}.cta a.btn{display:inline-block;background:#fff;color:#1d4ed8;padding:13px 26px;border-radius:14px;text-decoration:none;font-weight:700}
main>.card{max-width:720px;margin:20px auto}
footer{border-top:1px solid var(--line);background:var(--soft);padding:44px 0 26px;color:var(--mut);font-size:.93rem}
.fgrid{display:grid;gap:28px;grid-template-columns:2fr 1fr 1fr}@media(max-width:640px){.fgrid{grid-template-columns:1fr}}
footer h4{margin:0 0 10px;color:var(--ink)}footer a{display:block;margin:6px 0;color:var(--mut);text-decoration:none}footer a:hover{color:var(--a)}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}