:root{--ink:#18231c;--cream:#f5f1e8;--paper:#fffdf8;--green:#1d5037;--lime:#d9ee88;--line:#dcd7ca;--muted:#6e746f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font-family:Arial,sans-serif}header{height:76px;padding:0 max(5vw,24px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#f5f1e8;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:12px}.brand strong{font:23px Georgia;display:block}.brand small{display:block;font-size:9px;letter-spacing:2px}.logo{width:36px;height:36px;border-radius:50%;background:var(--green);color:var(--lime);display:grid;place-items:center;font:bold 22px Georgia}nav{display:flex;gap:30px}nav a{text-decoration:none;color:var(--ink);font-size:13px;font-weight:bold}main{max-width:1220px;margin:auto;padding:0 24px 80px}.hero{min-height:330px;display:flex;align-items:center;justify-content:space-between;padding:48px 4px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:bold;color:var(--green)}h1{font:54px/1.02 Georgia;margin:16px 0}h1 em{color:var(--green);font-weight:normal}.hero p{color:var(--muted);max-width:520px;font-size:17px}.hero-stats{display:flex;gap:40px}.hero-stats b{display:block;font:38px Georgia;color:var(--green)}.grid{display:grid;grid-template-columns:2fr 1fr;gap:22px}.card{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:28px;margin-bottom:22px}.section-title{display:flex;gap:16px;margin-bottom:24px}.section-title>span{background:var(--lime);border-radius:50%;min-width:34px;height:34px;display:grid;place-items:center}.section-title h2,.formula h2{font:28px Georgia;margin:0}.section-title p{margin:5px 0;color:var(--muted);font-size:13px}.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.calculator{grid-template-columns:repeat(2,1fr)}label{font-size:11px;font-weight:bold;text-transform:uppercase}input,select{display:block;width:100%;margin-top:7px;border:1px solid var(--line);background:#fff;padding:12px;border-radius:7px;font-size:14px}.span2{grid-column:span 2}.span3{grid-column:span 3}.primary{border:0;background:var(--green);color:white;border-radius:7px;padding:13px;font-weight:bold}.formula{background:var(--green);color:white}.formula .eyebrow{color:var(--lime)}.formula h2{font-size:32px;margin:13px 0 28px}.formula-step{display:flex;gap:14px;border-top:1px solid #ffffff2c;padding:18px 0}.formula-step b{color:var(--lime);font:20px Georgia}.formula-step p{margin:0;font-size:13px}.notice,.errors{padding:14px;border-radius:8px;margin-bottom:18px;background:#e1efbb}.errors{background:#f6d8d1}.table-wrap{overflow:auto;margin-top:24px}table{width:100%;border-collapse:collapse;text-align:left}th{font-size:9px;text-transform:uppercase;color:var(--muted);padding:12px;border-bottom:1px solid var(--line)}td{font-size:13px;padding:15px 12px;border-bottom:1px solid #e9e5dc}td small{display:block;color:var(--muted);margin-top:4px}.price{font:bold 17px Georgia;color:var(--green)}.delete{border:0;background:none;color:#9b6a62;font-size:22px}.empty{text-align:center;color:var(--muted);padding:25px;background:#f7f5ef}footer{text-align:center;padding:25px;color:var(--muted)}@media(max-width:850px){nav{display:none}.hero{display:block;min-height:0}.grid{grid-template-columns:1fr}.form-grid{grid-template-columns:repeat(2,1fr)}.span3{grid-column:span 2}}@media(max-width:520px){.form-grid,.calculator{grid-template-columns:1fr}.span2,.span3{grid-column:auto}}