:root{--ink:#0b2a44;--cyan:#009bb0;--paper:#f7f4ec;--line:#9bb3bf;--muted:#526474;--panel:#fffdf8}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.shell{width:min(1220px,calc(100% - 40px));margin-inline:auto}.site-header{border-bottom:1px solid #d9e1e4;background:rgba(247,244,236,.96);position:sticky;top:0;z-index:20}.header-inner{min-height:86px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:800}.brand-mark{width:25px;height:25px;border:2px solid var(--ink);position:relative;display:inline-block}.brand-mark i{position:absolute;width:7px;height:7px;border:2px solid var(--cyan);background:var(--paper)}.brand-mark i:nth-child(1){left:-5px;top:-5px}.brand-mark i:nth-child(2){right:-5px;top:-5px}.brand-mark i:nth-child(3){left:-5px;bottom:-5px}.brand-mark i:nth-child(4){right:-5px;bottom:-5px}.main-nav{display:flex;gap:24px;margin-left:auto}.main-nav a,.header-action{color:var(--ink);text-decoration:none;font-weight:750;font-size:.88rem}.main-nav a.active{color:#00889b;border-bottom:2px solid #00889b;padding-bottom:7px}.header-action{border:1px solid var(--ink);padding:13px 18px;box-shadow:3px 3px 0 var(--ink)}.pp-hero{padding:74px 0 48px}.eyebrow,.step,.kicker{font-size:.74rem;letter-spacing:.16em;font-weight:900;color:#007f92}.eyebrow{display:flex;align-items:center;gap:10px}.eyebrow span{width:28px;height:2px;background:#00a5b8}.hero-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(270px,.55fr);gap:70px;align-items:end}.pp-hero h1{font-family:Georgia,serif;font-size:clamp(3.2rem,7vw,6.5rem);line-height:.88;letter-spacing:-.055em;margin:20px 0 24px;max-width:900px}.pp-hero h1 em{font-weight:400}.pp-hero p{font-size:1rem;line-height:1.8;max-width:760px}.pp-hero aside{border:1px solid var(--ink);padding:24px;background:var(--panel);line-height:1.6}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.button{display:inline-flex;text-decoration:none;padding:14px 20px;border:1px solid var(--ink);font-weight:800;color:var(--ink)}.button.primary{background:var(--ink);color:white}.trust-row{display:flex;gap:22px;flex-wrap:wrap;margin-top:20px;font-size:.82rem;font-weight:700}.pp-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--ink);border-left:1px solid var(--ink)}.pp-card{padding:30px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:rgba(255,255,255,.28);min-width:0}.pp-card h2{font-family:Georgia,serif;font-size:2rem;margin:8px 0 10px}.pp-card>p{line-height:1.65;color:#28445a;min-height:82px}.two-samples{display:grid;grid-template-columns:1fr 1fr;gap:14px}.two-samples fieldset{border:1px solid #b8c8d0;padding:14px;display:grid;gap:10px}.two-samples legend{font-weight:900}.two-samples label,.field-grid label{display:grid;gap:5px;font-size:.78rem;font-weight:800}.two-samples input,.field-grid input,.field-grid select{width:100%;min-width:0;padding:11px 12px;border:1px solid #879eaa;background:white;color:var(--ink);font:inherit}.field-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.result-pair{display:grid;grid-template-columns:1fr 1fr;margin-top:18px;border:1px solid var(--ink)}.result-pair.triple{grid-template-columns:repeat(3,1fr)}.result-pair>div{padding:18px;border-right:1px solid var(--ink);min-width:0}.result-pair>div:last-child{border-right:0}.result-pair small,.result-pair span{display:block}.result-pair small{font-weight:900;letter-spacing:.08em;font-size:.68rem;color:#007f92}.result-pair strong{font-family:Georgia,serif;font-size:2rem;display:block;margin:6px 0}.result-pair span{font-size:.74rem;color:var(--muted)}.formula{margin-top:14px;padding:12px 14px;background:#eaf3f3;font:600 .78rem/1.5 ui-monospace,SFMono-Regular,Menlo,monospace}.creep-table{margin-top:16px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.creep-cell{border:1px solid #becbd1;padding:10px;background:#fff}.creep-cell b,.creep-cell span{display:block}.creep-cell b{font-size:.8rem}.creep-cell span{font-size:.72rem;color:var(--muted);margin-top:3px}.pp-guidance{padding:62px 0 80px}.pp-guidance h2{font-family:Georgia,serif;font-size:clamp(2.2rem,4vw,4rem);margin:8px 0 28px;max-width:800px}.guide-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}.guide-grid article{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);padding:22px}.guide-grid h3{font-family:Georgia,serif;font-size:1.4rem;margin:0 0 8px}.guide-grid p{line-height:1.6;font-size:.88rem;color:#375067}.source-box{margin-top:24px;border:1px solid var(--ink);padding:18px;display:flex;gap:18px;flex-wrap:wrap;align-items:center}.source-box a{color:#006e7d;font-weight:800}.site-footer{border-top:1px solid var(--ink);padding:36px 0 18px}.footer-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:40px}.footer-brand{margin-bottom:10px}.footer-grid p{color:var(--muted)}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.footer-links strong,.footer-links a{display:block}.footer-links a{margin-top:8px;color:var(--ink);text-decoration:none;font-size:.84rem}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #cbd5da;margin-top:28px;padding-top:16px;font-size:.78rem;color:var(--muted)}
@media(max-width:900px){.main-nav{display:none}.hero-grid,.pp-grid{grid-template-columns:1fr}.pp-grid{border-left:0}.pp-card{border-left:1px solid var(--ink)}.guide-grid{grid-template-columns:1fr 1fr}.field-grid{grid-template-columns:1fr 1fr}.result-pair.triple{grid-template-columns:1fr}.result-pair.triple>div{border-right:0;border-bottom:1px solid var(--ink)}.result-pair.triple>div:last-child{border-bottom:0}.footer-grid{grid-template-columns:1fr}.creep-table{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.shell{width:min(100% - 24px,1220px)}.header-inner{min-height:70px}.header-action{padding:10px 12px}.pp-hero{padding-top:42px}.pp-hero h1{font-size:clamp(2.8rem,16vw,4.4rem)}.pp-card{padding:20px}.two-samples,.field-grid,.result-pair,.guide-grid,.creep-table{grid-template-columns:1fr}.result-pair>div{border-right:0;border-bottom:1px solid var(--ink)}.result-pair>div:last-child{border-bottom:0}.footer-links{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}}