*{box-sizing:border-box}body{margin:0;font:16px/1.65 system-ui;color:#132238;background:#f7f9fc}header,main,footer{max-width:1120px;margin:auto;padding:1.25rem}header{display:flex;gap:2rem;align-items:center;justify-content:space-between;border-bottom:1px solid #e4eaf2}nav{display:flex;gap:1rem;flex-wrap:wrap}.brand{font-size:1.2rem;font-weight:800;text-decoration:none}.badge{color:#165dff;text-transform:uppercase;font-size:.82rem;letter-spacing:.05em;font-weight:800}h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.1;max-width:850px}h2{line-height:1.25}.lede{font-size:1.15rem;max-width:780px}.panel{min-width:0;background:white;border:1px solid #dbe3ef;border-radius:16px;padding:1.5rem;box-shadow:0 6px 22px rgba(19,34,56,.04)}.tool-grid,.content-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:1rem;margin:2rem 0}.tool-card{text-decoration:none;color:inherit}.tool-card span,.tool-card:hover h2{color:#075ff7}.calculator{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:1.5rem 0 2rem}.calculator label{min-width:0;display:grid;gap:.35rem;font-weight:650}.calculator input{min-width:0;width:100%;padding:.75rem;border:1px solid #aab9ce;border-radius:8px;font:inherit}.calculator button,.calculator output{grid-column:1/-1}.calculator button{width:max-content;padding:.8rem 1.1rem;border:0;border-radius:8px;background:#075ff7;color:white;font:inherit;font-weight:750;cursor:pointer}.calculator button:hover{background:#004bd1}.calculator output{display:block;min-height:4rem;padding:1rem;border-radius:10px;background:#eef5ff;white-space:pre-line;font-weight:700}.calculator output.error{background:#fff0f0;color:#9b1c1c}.notice{margin-top:1.5rem;padding:1rem;border-left:4px solid #e0a000;background:#fff9e8}section{margin:2rem 0}li+li{margin-top:.5rem}a{color:#075ff7}footer{color:#52647c}@media(max-width:700px){header{align-items:flex-start;flex-direction:column}.calculator{grid-template-columns:1fr}}