*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f8f9fb;--white:#fff;--text:#1e293b;--text-secondary:#64748b;--border:#e2e8f0;--accent:#6366f1;--accent-light:#eef2ff;--green:#10b981;--green-light:#ecfdf5;--yellow:#f59e0b;--yellow-light:#fffbeb;--red:#ef4444;--red-light:#fef2f2;--purple:#8b5cf6;--purple-light:#f5f3ff;--blue:#3b82f6;--blue-light:#eff6ff;--orange:#f97316;--shadow:0 1px 3px #0000000f;--shadow-md:0 4px 6px #0000000d;--radius:16px;--radius-sm:10px;--radius-xs:8px;--mono:"JetBrains Mono",monospace}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:Inter,-apple-system,sans-serif}.container{max-width:900px;margin:0 auto;padding:0 24px 48px}header{padding:20px 0}header a{color:var(--text-secondary);font-size:.95rem;font-weight:600;text-decoration:none}header a:hover{color:var(--accent)}.page-hero{text-align:center;padding:16px 0 24px}.page-hero h1{letter-spacing:-.02em;margin-bottom:6px;font-size:1.8rem;font-weight:800}.page-hero p{color:var(--text-secondary);max-width:560px;margin:0 auto;font-size:1rem}.spec-note{color:var(--text-secondary);background:var(--white);border:1px solid var(--border);border-radius:20px;margin-top:10px;padding:4px 14px;font-size:.75rem;display:inline-block}.card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px;padding:24px}.card-header{align-items:center;gap:8px;margin-bottom:16px;display:flex}.card-header .icon{border-radius:8px;justify-content:center;align-items:center;width:28px;height:28px;font-size:.9rem;display:flex}.card-header h3{text-transform:uppercase;letter-spacing:.04em;font-size:.85rem;font-weight:700}.tabs{border-bottom:2px solid var(--border);gap:4px;margin-bottom:20px;display:flex;overflow-x:auto}.tab{color:var(--text-secondary);cursor:pointer;white-space:nowrap;border-bottom:2px solid #0000;margin-bottom:-2px;padding:10px 18px;font-size:.88rem;font-weight:600;transition:all .15s}.tab:hover{color:var(--accent)}.tab.active{color:var(--accent);border-bottom-color:var(--accent)}.tab-content{display:none}.tab-content.active{display:block}.form-row{flex-wrap:wrap;align-items:end;gap:12px;margin-bottom:16px;display:flex}.form-group{flex-direction:column;flex:1;gap:4px;min-width:140px;display:flex}.form-group label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em;font-size:.78rem;font-weight:600}.form-input,.form-select{background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-xs);color:var(--text);font-family:var(--mono);width:100%;padding:10px 14px;font-size:1rem;font-weight:600;transition:border-color .15s}.form-input:focus,.form-select:focus{border-color:var(--green);outline:none;box-shadow:0 0 0 3px #10b98126}.form-select{appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;padding-right:36px;font-family:Inter,sans-serif}.btn{border:1.5px solid var(--border);border-radius:var(--radius-xs);background:var(--white);color:var(--text);cursor:pointer;box-shadow:var(--shadow);align-items:center;gap:6px;padding:10px 18px;font-family:inherit;font-size:.88rem;font-weight:600;transition:all .15s;display:inline-flex}.btn:hover{border-color:var(--green);color:var(--green);transform:translateY(-1px)}.btn.primary{background:var(--green);border-color:var(--green);color:#fff}.btn.primary:hover{background:#059669}.result-box{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);font-family:var(--mono);margin-top:16px;padding:20px;font-size:.95rem;line-height:2}.result-box .step{border-radius:var(--radius-xs);background:var(--white);border:1px solid var(--border);margin-bottom:8px;padding:8px 12px}.result-box .step-num{background:var(--accent);color:#fff;text-align:center;border-radius:50%;width:24px;height:24px;margin-right:8px;font-size:.7rem;font-weight:700;line-height:24px;display:inline-block}.result-box .highlight{background:var(--yellow-light);border-radius:4px;padding:2px 6px;font-weight:700}.result-box .answer{background:var(--green-light);border-radius:var(--radius-xs);color:var(--green);border:1px solid #10b98133;margin-top:12px;padding:12px;font-size:1.1rem;font-weight:700}.presets{flex-wrap:wrap;gap:6px;margin-bottom:16px;display:flex}.preset-btn{border:1px solid var(--border);background:var(--white);cursor:pointer;border-radius:20px;padding:6px 12px;font-size:.78rem;font-weight:600;transition:all .15s}.preset-btn:hover{background:var(--green-light);color:var(--green);border-color:var(--accent)}.comparison-bar{color:#fff;border-radius:6px;align-items:center;min-width:40px;height:28px;margin:4px 0;padding:0 10px;font-size:.75rem;font-weight:700;transition:width .5s;display:flex}