:root{
  --bg:#f4f1ea; --surface:#fffdf8; --ink:#171a21; --muted:#5d6370; --line:#e3ddd0;
  --accent:#ff6b4a; --accent-ink:#fff; --soft:#ebe5d8; --plum:#3b3355; --sage:#9fb3a0; --sand:#e9c99a;
  --radius:22px; --shadow:0 1px 2px rgba(23,26,33,.04),0 12px 32px -18px rgba(23,26,33,.25);
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#121419;--surface:#1a1d24;--ink:#f1eee7;--muted:#a3a8b3;--line:#2a2e37;--soft:#22262e;--plum:#cfc6f0;--accent:#ff7a5c}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
a{color:inherit}
img,svg{display:block;max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.kicker{font:600 12px/1.2 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:10px}
.kicker::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
h1,h2,h3{line-height:1.08;letter-spacing:-.02em;margin:0}
h1{font-size:clamp(40px,6.4vw,76px);font-weight:700}
h2{font-size:clamp(30px,4vw,46px);font-weight:700}
h3{font-size:21px;font-weight:650;letter-spacing:-.01em}
em.serif{font-family:var(--serif);font-style:italic;font-weight:500}
.btn{display:inline-flex;align-items:center;gap:14px;padding:16px 22px 16px 26px;border-radius:999px;background:var(--ink);color:var(--bg);text-decoration:none;font-weight:600;border:0;cursor:pointer;font-size:16px;transition:transform .2s ease,box-shadow .2s ease}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px -12px rgba(23,26,33,.5)}
.btn .arr{width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-size:15px}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line);padding:12px 18px}
.link{font-weight:600;text-decoration:none;border-bottom:1.5px solid var(--line);padding-bottom:2px;transition:border-color .2s}
.link:hover{border-color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:8px}

/* header */
header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid transparent}
header.scrolled{border-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:16px}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none}
.logo-mark{width:34px;height:34px;border-radius:10px;background:#171a21;display:flex;align-items:center;justify-content:center;gap:2.5px;flex:none}
.logo-mark i{display:block;border-radius:50%;background:var(--accent);transition:transform .45s cubic-bezier(.2,.8,.2,1)}
.logo-mark i:nth-child(1){width:5px;height:5px;opacity:.35}
.logo-mark i:nth-child(2){width:7px;height:7px;opacity:.62}
.logo-mark i:nth-child(3){width:10px;height:10px}
.logo:hover .logo-mark i:nth-child(1){transform:translateX(3px)}
.logo:hover .logo-mark i:nth-child(2){transform:translateX(2px)}
.logo:hover .logo-mark i:nth-child(3){transform:translateX(1px) scale(1.08)}
.logo-name{font-weight:750;letter-spacing:-.01em;font-size:19px}
.logo-name::first-letter{color:inherit}
@media (prefers-reduced-motion:reduce){.logo-mark i{transition:none}}
.nav ul{display:flex;gap:30px;list-style:none;margin:0;padding:0;font-size:15px}
.nav ul a{text-decoration:none;color:var(--muted);font-weight:500}
.nav ul a:hover{color:var(--ink)}
.nav .btn{padding:11px 14px 11px 18px;font-size:14px}
.nav .btn .arr{width:24px;height:24px;font-size:12px}

/* hero */
.hero-wrap{position:relative;overflow:hidden;isolation:isolate}
#glyphs{position:absolute;inset:0;width:100%;height:100%;z-index:-1;display:block}
.hero-wrap::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(90deg,var(--bg) 0%,color-mix(in srgb,var(--bg) 75%,transparent) 38%,transparent 70%),linear-gradient(0deg,var(--bg) 0%,transparent 22%)}
.hero{padding:104px 24px 72px;min-height:min(78vh,720px);display:flex;flex-direction:column;justify-content:center}
.hero h1{margin-top:22px;max-width:760px}
.hero p.lead{font-size:19px;color:var(--muted);max-width:520px;margin:24px 0 34px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.hero-cta .btn.ghost{padding:16px 24px;background:color-mix(in srgb,var(--bg) 70%,transparent)}
.strip{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.strip div{padding:20px 0;font-size:14px;color:var(--muted)}
.strip b{font-family:var(--mono);color:var(--ink);font-weight:600;margin-right:6px}

/* sections */
section{padding:88px 0}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:36px}
.sec-head h2{margin-top:14px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card .thumb{aspect-ratio:16/9;display:grid;place-items:center;overflow:hidden}
.card .thumb span{font:500 italic clamp(30px,3.4vw,44px)/1 var(--serif);letter-spacing:-.02em;transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.card:hover .thumb span{transform:scale(1.06)}
.t1{background:var(--sand);color:#171a21}.t2{background:var(--sage);color:#171a21}.t3{background:#3b3355;color:#f4f1ea}
.card .body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.meta{font:600 11px/1.3 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.meta span{color:var(--accent)}
.card p{margin:0;color:var(--muted);font-size:15px}
.card details{margin-top:auto}
.card summary{list-style:none;cursor:pointer;font-weight:600;display:inline-flex;gap:8px;align-items:center;border-bottom:1.5px solid var(--line);padding-bottom:2px;width:max-content}
.card summary::-webkit-details-marker{display:none}
.card details[open] summary{border-color:var(--accent)}
.card details .full{margin-top:14px;font-size:15px;color:var(--ink)}
.card details .full p{color:var(--ink);margin:0 0 10px}

/* tool */
.tool{background:var(--ink);color:#f4f1ea;border-radius:32px;padding:56px;display:grid;grid-template-columns:.9fr 1.1fr;gap:48px}
.tool .kicker{color:#b9bcc4}
.tool h2{margin:16px 0 18px}
.tool p{color:#c2c5cc;margin:0 0 24px}
.panel{background:#20242d;border:1px solid #2e333e;border-radius:22px;padding:26px}
.tabs{display:flex;gap:6px;background:#171a21;padding:5px;border-radius:999px;margin-bottom:22px;width:max-content;max-width:100%}
.tabs button{border:0;background:transparent;color:#b9bcc4;padding:9px 16px;border-radius:999px;font:600 14px var(--sans);cursor:pointer}
.tabs button[aria-selected="true"]{background:#f4f1ea;color:#171a21}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.field label{font-size:13px;color:#b9bcc4;font-weight:600}
textarea,input[type=number]{width:100%;background:#171a21;border:1.5px solid #2e333e;color:#f4f1ea;border-radius:14px;padding:14px 16px;font:16px/1.5 var(--sans);resize:vertical}
textarea:focus,input:focus{outline:none;border-color:var(--accent)}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label{padding:9px 14px;border-radius:12px;border:1.5px solid #2e333e;color:#d6d8dd;font-size:14px;font-weight:600;cursor:pointer}
.seg input:checked+label{border-color:var(--accent);background:rgba(255,107,74,.12);color:#fff}
.seg input:focus-visible+label{outline:3px solid var(--accent);outline-offset:2px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.result{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:6px}
.stat{background:#171a21;border-radius:14px;padding:14px 16px}
.stat small{display:block;font-size:12px;color:#9a9ea8;margin-bottom:4px}
.stat b{font-size:24px;letter-spacing:-.02em}
.hint{font-size:13px;color:#9a9ea8;margin-top:14px}
.check{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.check label{display:flex;gap:12px;align-items:flex-start;background:#171a21;border-radius:14px;padding:12px 14px;cursor:pointer;font-size:15px;color:#e4e5e8}
.check input{width:20px;height:20px;accent-color:var(--accent);margin-top:2px;flex:none}
.progress{height:8px;border-radius:999px;background:#171a21;overflow:hidden;margin:4px 0 16px}
.progress i{display:block;height:100%;width:0;background:var(--accent);transition:width .3s ease}
.tool-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.tool-actions button{background:transparent;border:1.5px solid #2e333e;color:#e4e5e8;border-radius:999px;padding:10px 16px;font:600 14px var(--sans);cursor:pointer}
.tool-actions button:hover{border-color:#f4f1ea}

/* about */
.about{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.about p{color:var(--muted);font-size:18px;margin:0 0 18px}
.principles{display:grid;gap:14px}
.pr{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px 22px;display:flex;gap:16px}
.pr b.n{font:600 13px var(--mono);color:var(--accent);flex:none;padding-top:3px}
.pr h3{font-size:18px;margin-bottom:4px}
.pr p{font-size:15px;margin:0;color:var(--muted)}

/* faq */
.faq{max-width:820px}
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq summary{cursor:pointer;font-weight:650;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-weight:400;font-size:24px;line-height:1;color:var(--muted);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{color:var(--muted);margin:12px 0 0}

footer{border-top:1px solid var(--line);padding:36px 0 48px;color:var(--muted);font-size:14px}
.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.foot nav{display:flex;gap:22px}
.foot a{text-decoration:none}
.foot a:hover{color:var(--ink)}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}

@media (max-width:980px){
  .tool,.about{grid-template-columns:1fr}
  .hero{padding-top:72px;min-height:auto}
  .cards{grid-template-columns:1fr 1fr}
  .tool{padding:36px 28px}
  .nav ul{display:none}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  section{padding:64px 0}
  .cards{grid-template-columns:1fr}
  .strip{grid-template-columns:1fr}
  .strip div{padding:12px 0;border-bottom:1px solid var(--line)}
  .hero{padding:56px 16px 48px}
  .hero-wrap::after{background:linear-gradient(0deg,var(--bg) 0%,color-mix(in srgb,var(--bg) 55%,transparent) 60%,color-mix(in srgb,var(--bg) 35%,transparent) 100%)}
  .sec-head{flex-direction:column;align-items:flex-start}
  .tool{padding:28px 18px;border-radius:24px}
  .panel{padding:18px}
  .row2{grid-template-columns:1fr}
  .result{grid-template-columns:1fr 1fr}
  .result .stat:last-child{grid-column:1/-1}
  .nav .btn span.t{display:none}
  .nav .btn{padding:8px}
}

/* inner pages */
.page{padding-top:56px;padding-bottom:24px}
.crumbs{display:flex;gap:10px;font-size:14px;color:var(--muted);margin-bottom:28px;flex-wrap:wrap}
.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--ink)}
.page h1{font-size:clamp(34px,5vw,58px);max-width:880px;margin-top:16px}
.page .lead{font-size:19px;color:var(--muted);max-width:680px;margin:20px 0 0}
.cover{margin:40px 0 0;border-radius:28px;aspect-ratio:21/8;display:grid;place-items:center;overflow:hidden}
.cover span{font:500 italic clamp(44px,8vw,110px)/1 var(--serif);letter-spacing:-.03em}
.article{display:grid;grid-template-columns:260px minmax(0,680px);gap:64px;padding:56px 0 88px}
.toc{position:sticky;top:100px;align-self:start;font-size:15px}
.toc b{display:block;font:600 11px/1.3 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.toc ol{margin:0;padding:0;list-style:none;display:grid;gap:10px;counter-reset:t}
.toc li{counter-increment:t;display:flex;gap:10px}
.toc li::before{content:"0" counter(t);font:600 12px/1.9 var(--mono);color:var(--accent)}
.toc a{text-decoration:none;color:var(--muted)}.toc a:hover{color:var(--ink)}
.toc .btn{margin-top:22px;padding:12px 14px 12px 18px;font-size:14px}
.toc .btn .arr{width:24px;height:24px;font-size:12px}
.prose{font-size:18px;line-height:1.7}
.prose h2{font-size:28px;margin:48px 0 16px;scroll-margin-top:96px}
.prose h2:first-child{margin-top:0}
.prose p{margin:0 0 18px}
.prose ul{margin:0 0 18px;padding-left:22px}.prose li{margin-bottom:8px}
.prose code{font:15px var(--mono);background:var(--soft);padding:2px 6px;border-radius:6px}
.note{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px 22px;font-size:16px;color:var(--muted);margin-top:32px}
.cta-box{margin-top:40px;background:var(--ink);color:#f4f1ea;border-radius:24px;padding:28px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.cta-box p{margin:0;font-size:17px;color:#d6d8dd;max-width:420px}
.cta-box b{display:block;color:#fff;font-size:20px;margin-bottom:4px}
.cta-box .btn{background:#f4f1ea;color:#171a21}
.more{border-top:1px solid var(--line);padding:56px 0 88px}
.more h2{font-size:28px;margin-bottom:24px}
.cards.two{grid-template-columns:repeat(2,1fr)}
a.card{text-decoration:none;color:inherit}
.card .go{margin-top:auto;font-weight:600;border-bottom:1.5px solid var(--line);padding-bottom:2px;width:max-content}
a.card:hover .go{border-color:var(--accent)}
.policy{max-width:760px;padding:8px 0 88px}
.policy h2{font-size:24px;margin:40px 0 12px}
.policy p{color:var(--muted);font-size:17px;margin:0 0 14px}
.policy code{font:15px var(--mono);background:var(--soft);padding:2px 6px;border-radius:6px;color:var(--ink)}
@media (max-width:980px){.article{grid-template-columns:1fr;gap:28px}.toc{position:static;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px}}
@media (max-width:640px){.cards.two{grid-template-columns:1fr}.cover{aspect-ratio:16/9;margin-top:28px}.prose{font-size:17px}.page{padding-top:32px}}