:root{color-scheme:light;--ink:#142232;--muted:#596777;--line:#dae3eb;--paper:#fff;--bg:#f4f7fb;--blue:#2563eb;--deep:#1742a0;--soft:#eaf1ff}*{box-sizing:border-box}html{font-family:system-ui,-apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;line-height:1.65}body{margin:0;background:var(--bg);color:var(--ink)}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #92b7ff;outline-offset:2px}.container{max-width:1080px;margin:auto;padding:0 22px}.site-header{background:#fff;border-bottom:1px solid var(--line)}.nav{display:flex;justify-content:space-between;align-items:center;gap:18px;min-height:72px}.logo{font-size:1.25rem;font-weight:900;letter-spacing:-.03em}.logo span{color:var(--blue)}nav{display:flex;gap:24px;flex-wrap:wrap;color:var(--muted);font-size:.95rem}.hero{padding:76px 0 48px}.eyebrow{color:var(--blue);font-weight:800;font-size:.86rem;letter-spacing:.08em}.hero h1{font-size:clamp(2.2rem,5vw,3.7rem);letter-spacing:-.065em;line-height:1.25;margin:15px 0}.lead{font-size:1.1rem;color:var(--muted);max-width:660px}.pill{display:inline-block;background:var(--soft);color:var(--deep);border-radius:100px;padding:6px 12px;font-size:.82rem;font-weight:800}.section-title{font-size:1.55rem;letter-spacing:-.035em}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:25px 0 70px}.card{background:var(--paper);padding:27px;border:1px solid var(--line);border-radius:18px;box-shadow:0 9px 23px rgba(26,55,85,.04);transition:transform .15s,border-color .15s}.card:hover{transform:translateY(-3px);border-color:#a7bce3;text-decoration:none}.icon{font-size:1.7rem}.card h3{font-size:1.2rem;margin:10px 0 5px}.card p{color:var(--muted);font-size:.94rem}.arrow{color:var(--blue);font-weight:800}.main{padding:45px 0 90px}.breadcrumbs{font-size:.86rem;color:var(--muted)}.page-title{font-size:clamp(2rem,4vw,2.75rem);letter-spacing:-.055em;margin:14px 0 8px}.desc{color:var(--muted);max-width:720px;margin-bottom:30px}.columns{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.85fr);gap:24px;align-items:start}.panel{border:1px solid var(--line);border-radius:20px;background:var(--paper);padding:27px;box-shadow:0 9px 23px rgba(26,55,85,.04)}.panel h2{font-size:1.2rem;margin:0 0 18px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}label{display:flex;flex-direction:column;gap:7px;font-weight:700;font-size:.93rem}input,select{width:100%;border:1px solid #bfcbd7;background:#fff;padding:12px 13px;border-radius:9px;font-size:1rem;color:var(--ink)}.button{border:0;cursor:pointer;border-radius:10px;background:var(--blue);color:white;font-weight:800;font-size:1rem;padding:14px 18px;margin-top:19px;width:100%}.button:hover{background:var(--deep)}.error{color:#ae1d32;min-height:1.2em;font-size:.9rem}.result{margin-top:18px;background:var(--soft);border-radius:12px;padding:14px 17px}.result-row{display:flex;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px solid #ccdaf5}.result-row:last-child{border-bottom:0}.result-row strong{font-size:1.12rem;text-align:right}.article h2{font-size:1.2rem;margin:0 0 12px}.article p,.article li{font-size:.94rem;color:var(--muted)}.article code{background:var(--soft);padding:2px 6px;border-radius:5px;word-break:break-word}.notice{font-size:.83rem;color:var(--muted);margin-top:15px}.site-footer{border-top:1px solid var(--line);padding:26px 0;color:var(--muted);font-size:.86rem}.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}@media(max-width:780px){.grid{grid-template-columns:1fr}.columns{grid-template-columns:1fr}.hero{padding:45px 0 30px}.main{padding:30px 0 60px}.nav{padding:10px 0;min-height:60px}.form-grid{grid-template-columns:1fr}.panel{padding:21px}}