:root{--background:#fafafa;--foreground:#09090b;--card:#fff;--card-foreground:#09090b;--primary:#18181b;--primary-foreground:#fafafa;--muted:#71717a;--border:#e4e4e7;--accent:#2563eb;--radius:12px;--max-width:1200px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--background);color:var(--foreground);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Inter,Segoe UI,Roboto,sans-serif;line-height:1.5}h1,h2,h3,h4{letter-spacing:-.04em;color:#000;font-weight:700}main{max-width:var(--max-width);margin:0 auto;padding:48px 20px}header{border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:50;background:#fffc;padding:16px 0;position:sticky;top:0}.header-inner{max-width:var(--max-width);justify-content:space-between;align-items:center;margin:0 auto;padding:0 20px;display:flex}.logo{color:#000;font-size:20px;font-weight:800;text-decoration:none}.hero{text-align:center;padding:64px 0 48px}.hero h1{margin-bottom:16px;font-size:56px;line-height:1.1}.hero p{color:var(--muted);max-width:600px;margin:0 auto 40px;font-size:20px}.search-container{max-width:600px;margin:0 auto;position:relative}.search-input{border:1px solid var(--border);background:#fff;border-radius:99px;outline:none;width:100%;padding:16px 24px;font-size:16px;transition:all .2s;box-shadow:0 4px 12px #0000000d}.search-input:focus{border-color:var(--accent);box-shadow:0 0 0 4px #2563eb1a}.tool-grid{grid-template-columns:1.5fr 1fr;gap:32px;margin-bottom:64px;display:grid}@media (max-width:1024px){.tool-grid{grid-template-columns:1fr}}.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;padding:24px;display:flex;box-shadow:0 1px 2px #0000000d}.tool-card h2{align-items:center;gap:12px;margin-bottom:20px;font-size:20px;display:flex}.pro-calc{background:#fdfdfd}.calc-display-group{margin-bottom:16px}.sci-display{text-align:right;background:#09090b;border:1px solid #27272a;border-radius:12px;flex-direction:column;justify-content:flex-end;min-height:120px;padding:20px;display:flex;box-shadow:inset 0 2px 4px #0003}.sci-expr{color:#a1a1aa;text-overflow:ellipsis;white-space:nowrap;margin-bottom:4px;font-family:JetBrains Mono,ui-monospace,monospace;font-size:14px;overflow:hidden}.sci-val{color:#fff;word-break:break-all;font-family:JetBrains Mono,ui-monospace,monospace;font-size:36px;font-weight:700}.sci-grid{grid-template-columns:repeat(7,1fr);gap:8px;display:grid}@media (max-width:640px){.sci-grid{grid-template-columns:repeat(4,1fr)}}.sci-btn{border:1px solid var(--border);cursor:pointer;-webkit-user-select:none;user-select:none;background:#fff;border-radius:8px;padding:12px 8px;font-size:13px;font-weight:600;transition:all .1s}.sci-btn:hover{background:#f4f4f5;border-color:#d4d4d8}.sci-btn:active{transform:scale(.96)}.sci-btn.op{color:var(--accent);background:#f4f4f5}.sci-btn.num{font-size:16px}.sci-btn.util{color:#ef4444;background:#fef2f2;border-color:#fee2e2}.sci-btn.eq{background:var(--accent);color:#fff;border-color:var(--accent);grid-column:span 1}.sci-btn.eq:hover{background:#1d4ed8}.mini-tools{flex-direction:column;gap:32px;display:flex}.perc-form{flex-direction:column;gap:16px;display:flex}.perc-row{background:#f9fafb;border-radius:8px;grid-template-columns:auto 1fr auto 1fr auto;align-items:center;gap:8px;padding:12px;font-size:14px;display:grid}.perc-row input{border:1px border var(--border);border-radius:6px;outline:none;width:100%;padding:6px 10px}.perc-row input:focus{border-color:var(--accent)}.perc-res{color:var(--accent);text-align:right;font-weight:700}.category-section{margin-bottom:64px}.section-label{text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:24px;font-size:12px;font-weight:600}.sitemap-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px;display:grid}.category-card{border:1px solid var(--border);border-radius:var(--radius);background:#fff;padding:24px;transition:all .2s}.category-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000000d}.category-card h3{justify-content:space-between;align-items:center;margin-bottom:16px;font-size:18px;display:flex}.unit-list{list-style:none}.unit-list li{margin-bottom:8px}.unit-list a{color:#52525b;font-size:14px;text-decoration:none;transition:color .15s}.unit-list a:hover{color:var(--accent)}.ad-slot{border:1px dashed var(--border);color:#a1a1aa;text-transform:uppercase;letter-spacing:.1em;background:#f4f4f5;border-radius:8px;justify-content:center;align-items:center;margin:32px 0;font-size:11px;display:flex}.ad-lb{height:90px}.ad-rec{height:250px}.footer-seo{border-top:1px solid var(--border);background:#fff;padding:80px 20px}.seo-text{max-width:800px;margin:0 auto}.seo-text h2{margin-bottom:24px;font-size:32px}.seo-text p{color:#52525b;margin-bottom:24px;font-size:18px;line-height:1.7}footer{text-align:center;border-top:1px solid var(--border);color:var(--muted);padding:40px 0;font-size:14px}