:root{--ink: #0c1424;--muted: #64748b;--soft: #f5f7fb;--surface: #ffffff;--line: #e3e8f2;--navy: #081627;--blue: #2563eb;--cyan: #06b6d4;--green: #12b981;--amber: #f59e0b;--radius: 24px;--shadow: 0 26px 70px rgba(15, 23, 42, .12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--ink);background:radial-gradient(circle at 10% 0%,rgba(37,99,235,.12),transparent 32rem),radial-gradient(circle at 92% 8%,rgba(6,182,212,.12),transparent 30rem),linear-gradient(180deg,#f8fbff,#eef3f9);line-height:1.5}a{color:inherit;text-decoration:none}button,input{font:inherit}.topbar,main,.footer{width:min(1180px,calc(100% - 32px));margin:0 auto}.topbar{position:sticky;top:12px;z-index:10;margin-top:12px;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:12px 14px;background:#ffffffc7;backdrop-filter:blur(16px);border:1px solid rgba(226,232,240,.85);border-radius:22px;box-shadow:0 14px 45px #0f172a14}.brand{display:flex;align-items:center;gap:12px}.logo-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:15px;color:#fff;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 12px 28px #2563eb47}.logo-mark svg{width:34px;height:34px}.brand-copy{display:grid;line-height:1.05}.brand-copy strong{font-size:1.03rem;letter-spacing:-.03em}.brand-copy small{color:var(--muted);margin-top:4px;font-weight:650}.nav{display:flex;align-items:center;gap:8px}.nav a{padding:10px 14px;border-radius:999px;color:#334155;font-weight:760}.nav a:hover{background:#eef5ff;color:var(--blue)}.hero{margin-top:34px;padding:clamp(34px,7vw,76px);border-radius:34px;color:#fff;background:linear-gradient(135deg,#081627f0,#0f2d52f0),radial-gradient(circle at 20% 20%,rgba(6,182,212,.45),transparent 26rem);box-shadow:var(--shadow);overflow:hidden;position:relative}.hero:after{content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;background:#ffffff14}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border-radius:999px;background:#ffffff1f;border:1px solid rgba(255,255,255,.16);color:#b6f4ff;font-size:.8rem;font-weight:850;letter-spacing:.08em;text-transform:uppercase}h1,h2,h3{margin:0;letter-spacing:-.05em;line-height:1.02}h1{max-width:900px;margin-top:16px;font-size:clamp(2.55rem,6vw,5.7rem)}.hero p{max-width:760px;margin:18px 0 0;color:#cbd5e1;font-size:1.16rem}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 18px;border:1px solid rgba(255,255,255,.18);background:#fff;color:var(--navy);font-weight:850}.button.secondary{background:#ffffff14;color:#fff}.section{padding:42px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:18px}.section-head p{color:var(--muted);max-width:660px;margin:8px 0 0}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.category-block{margin-top:22px}.category-title{margin:0 0 12px;font-size:1.15rem;color:#334155;letter-spacing:-.03em}.tool-card,.panel,.result-panel,.input-panel{background:#fffffff0;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 16px 48px #0f172a14}.tool-card{display:flex;flex-direction:column;min-height:230px;padding:22px;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.tool-card:hover{transform:translateY(-3px);border-color:#2563eb61;box-shadow:0 24px 70px #0f172a24}.tool-category{width:fit-content;padding:6px 10px;border-radius:999px;background:#eef6ff;color:#1d4ed8;font-size:.76rem;font-weight:900}.tool-card h3{margin-top:14px;font-size:1.35rem}.tool-card p{color:var(--muted);margin:10px 0 18px}.tool-action{margin-top:auto;color:var(--blue);font-weight:900}.category-card{min-height:185px}.inline-link{color:var(--blue);font-weight:900;white-space:nowrap}.category-head{align-items:center}.category-head .category-title{margin-bottom:2px}.category-head p{margin:0}.calculator-shell{display:grid;grid-template-columns:minmax(0,1.1fr) 390px;gap:22px;align-items:start}.input-panel,.result-panel{padding:22px}.input-section+.input-section{margin-top:24px;padding-top:22px;border-top:1px solid var(--line)}.subhead{display:flex;justify-content:space-between;gap:14px;align-items:baseline;margin-bottom:14px}.subhead h2{font-size:1.35rem}.subhead p{margin:5px 0 0;color:var(--muted)}.preset-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.preset-card{position:relative;display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start;padding:15px;border-radius:18px;border:1px solid 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9px;font-size:.78rem;font-weight:850;cursor:pointer}.suggestion-chip:hover{border-color:#2563eb73;background:#eff6ff;color:var(--blue)}.input-wrap{position:relative}.input-wrap input{width:100%;min-height:48px;border:1px solid var(--line);border-radius:16px;padding:12px 74px 12px 14px;background:#fff;color:var(--ink);outline:none}.input-wrap input:focus{border-color:var(--blue);box-shadow:0 0 0 4px #2563eb1f}.unit-badge{position:absolute;right:9px;top:50%;transform:translateY(-50%);padding:5px 8px;border-radius:999px;background:#eef2f7;color:#475569;font-size:.78rem;font-weight:900}input[type=number]::-webkit-outer-spin-button,input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{appearance:textfield;-moz-appearance:textfield}.unit-toggle{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:20px;padding:14px;border:1px solid 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summary{cursor:pointer;font-weight:900;color:#334155}details.advanced .field-grid{margin-top:14px}.result-panel{position:sticky;top:104px}.result-card{padding:22px;color:#fff;border-radius:22px;background:linear-gradient(135deg,var(--blue),#0f766e);box-shadow:0 22px 55px #2563eb38}.result-label{opacity:.84;font-weight:850}.result-value{margin-top:8px;font-size:clamp(2rem,5vw,3.6rem);font-weight:950;letter-spacing:-.06em}.result-summary{margin-top:12px;color:#ffffffe0}.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:16px}.metric{border-radius:16px;padding:12px;background:#f8fafc;border:1px solid var(--line)}.metric span{display:block;color:var(--muted);font-size:.8rem;font-weight:850}.metric strong{display:block;margin-top:3px;font-size:1.05rem}.note-list{margin:18px 0 0;padding:0;list-style:none;display:grid;gap:10px}.note-list li{padding:12px 13px;border-radius:16px;background:#fff7ed;color:#7c2d12;border:1px solid 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