html{scroll-behavior:smooth}
.intro{padding:56px 0 60px}
.back{display:inline-block;color:var(--muted);font-size:13px;margin-bottom:30px}
.back:hover{color:var(--mint)}
h1{font-size:clamp(38px,6.4vw,70px);line-height:1;letter-spacing:-.05em;margin:16px 0 16px;max-width:920px}
.lead{color:var(--muted);font-size:20px;max-width:700px;margin:0 0 24px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:6px 12px;border-radius:20px;font-size:12px;font-weight:700;background:#1b2e26;border:1px solid #2f4a3e;color:#d7eee2}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{padding:12px 17px;border-radius:7px;font-size:13px;font-weight:750;display:inline-block;background:var(--mint);color:#10231d}
.btn.ghost{background:transparent;border:1px solid #65736d;color:#fff}
.btn.ghost.dk{border-color:#13231c;color:#13231c}
.kicker{font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:800;color:#39725b}
.section{padding:72px 0}
.light{background:var(--paper);color:var(--deep)}
.soft{background:#e7f5ef;color:var(--deep)}
.dark{background:var(--deep)}
h2{font-size:clamp(28px,4vw,44px);letter-spacing:-.04em;line-height:1.06;margin:12px 0 14px}
.sub{max-width:680px;color:#33443c;margin:0 0 28px;font-size:17px}
.dark .sub{color:var(--muted)}
.note{background:#fff8e6;border:1px solid #f0d58a;border-radius:12px;padding:16px 20px;color:#5c4710;font-size:15px;max-width:860px}
.note strong{color:#3d2f08}
.pi{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.pi article{background:#fff;border:1px solid #dfe5e0;border-radius:14px;padding:26px}
.pi h3{font-size:22px;letter-spacing:-.03em;margin:8px 0 10px}
.pi p{margin:0 0 12px;font-size:17px;color:#33443c}
.pi p:last-child{margin:0}
table.data{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border:1px solid #dfe5e0;border-radius:12px;overflow:hidden}
table.data th,table.data td{padding:10px 14px;text-align:left;border-bottom:1px solid #edf1ee}
table.data th{background:#f4f7f5;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:#285c46}
table.data td.n,table.data th.n{text-align:right;font-variant-numeric:tabular-nums}
table.data tr:last-child td{border-bottom:0}
.steps{list-style:none;margin:0;padding:0;counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.steps li{counter-increment:s;background:#fff;border:1px solid #dfe5e0;border-radius:12px;padding:20px;position:relative}
.steps li:before{content:counter(s);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--mint);color:#10231d;font-weight:800;font-size:13px;margin-bottom:10px}
.steps h3{margin:0 0 6px;font-size:17px}
.steps p{margin:0;font-size:15px;color:#33443c}
.formula{margin-top:18px;background:#13231c;color:#fff;border-radius:12px;padding:18px 22px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:15px;overflow-x:auto}
.formula span{color:var(--mint)}
.demo{display:grid;grid-template-columns:300px 1fr;gap:20px;align-items:start}
.ctrl{background:#fff;border:1px solid #dfe5e0;border-radius:14px;padding:20px;display:grid;gap:18px}
.ctrl label.t,.ctrl .t{display:block;font-size:11px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:#39725b;margin-bottom:8px}
.ctrl select{width:100%;font:inherit;font-size:15px;padding:10px 12px;border-radius:8px;border:1px solid #cfe3d8;background:#fff;color:#13231c}
.kval{display:flex;align-items:center;gap:12px}
.kval input{flex:1;accent-color:#1f9d6a}
.kval output{min-width:32px;text-align:center;font-weight:800;font-size:18px;background:#13231c;color:var(--mint);border-radius:8px;padding:4px 0}
.feats{display:grid;gap:6px}
.feats label,.toggle{display:flex;align-items:center;gap:10px;font-size:15px;cursor:pointer}
.feats input,.toggle input{width:18px;height:18px;accent-color:#1f9d6a}
.toggle{background:#f1fbf6;border:1px solid #9fd8bd;border-radius:10px;padding:12px}
.toggle small{display:block;font-size:12px;color:var(--soft)}
.axes{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.chart{background:#fff;border:1px solid #dfe5e0;border-radius:14px;padding:16px 16px 10px;position:relative}
.chart-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;align-items:center;margin-bottom:6px}
.chart-head h3{margin:0;font-size:16px}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:#33443c}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:10px;height:10px;border-radius:50%;display:inline-block}
.chart svg{display:block;width:100%;height:auto}
.chart .cap{font-size:12px;color:var(--soft);margin:4px 0 0}
.tip{position:absolute;pointer-events:none;background:#13231c;color:#fff;border-radius:8px;padding:8px 10px;font-size:12px;line-height:1.45;white-space:nowrap;transform:translate(-50%,calc(-100% - 12px));opacity:0;transition:opacity .1s;z-index:2}
.tip strong{display:block;font-size:13px}
.results{display:grid;grid-template-columns:1.2fr 1fr;gap:20px;margin-top:20px}
.rank{background:#fff;border:1px solid #dfe5e0;border-radius:14px;padding:18px 20px}
.rank h3{margin:0 0 10px;font-size:16px}
.rank ol{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.rank li{display:grid;grid-template-columns:30px 1fr auto;gap:10px;align-items:center;font-size:15px}
.rank li .r{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#1f9d6a;color:#fff;font-weight:800;font-size:13px}
.rank li .bar{height:6px;border-radius:3px;background:#e6efe9;position:relative;margin-top:5px}
.rank li .bar i{position:absolute;left:0;top:0;bottom:0;border-radius:3px;background:#1f9d6a}
.rank li .d{font-variant-numeric:tabular-nums;font-size:13px;color:var(--soft)}
.compare{background:#13231c;color:#fff;border-radius:14px;padding:18px 20px}
.compare h3{margin:0 0 8px;font-size:16px;color:var(--mint)}
.compare p{margin:0 0 8px;color:#d3ddd8;font-size:15px}
.compare .same{color:var(--mint);font-weight:700}
.compare .diff{color:#f2b9cf;font-weight:700}
details.tbl{margin-top:16px}
details.tbl summary{cursor:pointer;font-weight:800;font-size:14px;color:#2d7a57}
details.tbl table{margin-top:10px}
.scale-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.scale-card{background:#1b2e26;border:1px solid #2f4a3e;border-radius:14px;padding:22px}
.scale-card h3{margin:0 0 8px;font-size:18px}
.scale-card p{margin:0 0 10px;color:#d3ddd8;font-size:15px}
.ranges{display:grid;gap:8px;margin-top:6px}
.ranges div{display:grid;grid-template-columns:130px 1fr;gap:10px;align-items:center;font-size:13px;color:#d3ddd8}
.ranges .rb{height:10px;border-radius:5px;background:var(--mint)}
.take{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.take article{background:#fff;border:1px solid #dfe5e0;border-radius:14px;padding:24px}
.take h3{margin:8px 0 8px;font-size:20px;letter-spacing:-.025em}
.take p{margin:0;font-size:16px;color:#33443c}
.shots{display:grid;grid-template-columns:.8fr 1.2fr;gap:14px;margin-top:22px}
.shots img{display:block;width:100%;border-radius:12px;border:1px solid #2f4a3e}
.cta{background:var(--deep);padding:56px 0}
.cta h2{font-size:clamp(26px,3vw,36px)}
.cta p{color:var(--muted);max-width:620px;margin:0 0 22px}
@media(max-width:900px){.demo,.results,.pi,.scale-grid,.take,.shots{grid-template-columns:1fr}.steps{grid-template-columns:1fr}}
@media(max-width:720px){.section{padding:52px 0}}