:root{--blue:#2563eb;--blue2:#1d4ed8;--dark:#172033;--muted:#64748b;--line:#e2e8f0;--soft:#f7faff;--danger:#b42318;--max:880px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--dark);background:var(--soft);font:16px/1.7 system-ui,-apple-system,"Segoe UI",sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.wrap{width:min(calc(100% - 32px),var(--max));margin-inline:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:20;background:#fff;padding:10px}:focus-visible{outline:3px solid #f59e0b;outline-offset:3px}header{border-bottom:1px solid var(--line);background:#fff}.header-inner{height:64px;display:flex;align-items:center}.brand{font-weight:900;font-size:1.4rem;letter-spacing:-.04em}.brand span{color:var(--blue)}.back{margin-left:auto;color:#475569;font-weight:700;font-size:.92rem}.hero{padding:42px 0 26px;text-align:center}.eyebrow{display:inline-block;margin-bottom:10px;padding:4px 12px;border-radius:999px;background:#dbeafe;color:#1e40af;font-size:.82rem;font-weight:800}.hero h1{margin:0;font-size:clamp(2rem,7vw,3.1rem);line-height:1.2;letter-spacing:-.045em}.hero p{margin:10px auto 0;max-width:650px;color:var(--muted)}.tool{margin:0 auto 44px;padding:28px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 18px 45px #1e3a8a12}.tool h2{margin:0 0 5px;font-size:1.35rem}.lead{margin:0 0 22px;color:var(--muted);font-size:.94rem}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.field{margin-bottom:16px}.field label,.label{display:block;margin-bottom:6px;font-size:.9rem;font-weight:800}.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:10px;background:#fff;color:var(--dark)}.field input,.field select{min-height:48px}.field textarea{min-height:150px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue)}.actions{display:flex;gap:10px;margin-top:20px}.primary,.secondary{min-height:48px;padding:10px 22px;border-radius:10px;font-weight:800}.primary{flex:1;border:0;background:var(--blue);color:#fff}.primary:hover{background:var(--blue2)}.secondary{border:1px solid var(--line);background:#fff;color:#475569}.result{margin-top:22px;padding:21px;border:1px solid #bfdbfe;border-radius:14px;background:#eff6ff}.result[hidden]{display:none}.result-label{margin:0;color:#1e40af;font-size:.85rem;font-weight:800}.result-main{margin:2px 0 3px;color:#1e3a8a;font-size:clamp(1.8rem,7vw,2.5rem);font-weight:900;letter-spacing:-.04em;line-height:1.25}.result-sub{margin:3px 0;color:#475569;font-size:.92rem}.error{margin:12px 0 0;color:var(--danger);font-weight:700;font-size:.9rem}.error:empty{display:none}.note{padding:12px 14px;border-radius:10px;background:#f8fafc;color:#475569;font-size:.86rem}.tabs{display:flex;gap:6px;margin-bottom:20px;padding:4px;background:#eef4ff;border-radius:12px;overflow:auto}.tab{flex:1;white-space:nowrap;padding:10px;border:0;border-radius:9px;background:transparent;color:#475569;font-weight:800}.tab.active{background:#fff;color:var(--blue);box-shadow:0 2px 8px #1e3a8a14}.tips{margin-bottom:48px;padding:25px;border:1px solid var(--line);border-radius:16px;background:#fff}.tips h2{margin:0 0 10px;font-size:1.2rem}.tips p,.tips ul{margin:0;color:#475569}.tips ul{padding-left:1.3em}footer{padding:28px 0;background:#152033;color:#cbd5e1}.footer-inner{display:flex;align-items:center;justify-content:space-between}.footer-note{font-size:.82rem}@media(max-width:620px){.hero{padding-top:32px}.tool{padding:21px 15px}.grid2,.grid3{grid-template-columns:1fr}.actions{flex-direction:column}.secondary{order:2}.footer-inner{display:block}.footer-note{margin-top:8px}}