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#dfe5ed;border-radius:16px;padding:30px;min-height:470px}.panel-head{display:flex;gap:12px;align-items:center;margin-bottom:8px}.panel h2,.panel h1{font-size:1.4rem;margin:0;letter-spacing:-.04em}.tag{background:#edf4ff;color:#2161df;font-size:.75rem;padding:5px 8px;border-radius:5px}.sub{font-size:.9rem;color:#6c788b;margin:10px 0 25px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}label{display:block;font-size:.875rem;font-weight:600;margin-bottom:8px}input,select,textarea{width:100%;border:1px solid #cdd6e2;border-radius:8px;padding:12px;color:#182738;background:white;min-height:46px}input:focus,select:focus,textarea:focus{outline:2px solid #2161df;border-color:transparent}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}.chips button{border:1px solid #d8e1ee;background:white;color:#526176;border-radius:7px;padding:9px 12px;cursor:pointer;font-size:.875rem}.chips 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#dce5f2;font-size:.9rem;gap:15px}.error{color:#b42f3d}.section-title{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:42px}.section-title h2{font-size:1.2rem}.section-title span{font-size:.8rem;color:#6e7c90}.guides{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:10px}details{background:white;border:1px solid #dfe5ed;border-radius:10px;padding:20px}summary{font-size:.9rem;font-weight:600;cursor:pointer;line-height:1.6}details p{font-size:.875rem;color:#627084}footer{max-width:1152px;margin:0 auto;display:flex;gap:20px;justify-content:space-between;border-top:1px solid #dce2eb;padding:26px 0 36px;font-size:.75rem;color:#738095}footer strong{color:#283a53}#toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:#182738;color:white;padding:12px 20px;border-radius:8px;display:none}@media(max-width:780px){header{height:68px;padding:0 20px}main{padding:24px 16px}h1,.hero-title{font-size:1.8rem}.workspace{grid-template-columns:1fr;gap:12px}nav{display:flex;overflow:auto;gap:8px;padding:0 0 6px}nav a{flex-shrink:0;margin:0;padding:12px;font-size:.85rem}.nav-label,.nav-note{display:none}.panel{padding:22px}.guides{grid-template-columns:1fr}.section-title{align-items:start}.section-title span{display:none}footer{margin:0 16px;flex-wrap:wrap;gap:12px}.big{font-size:1.65rem}}@media(max-width:430px){.grid{grid-template-columns:1fr}.panel{padding:18px}.result{padding:18px}.result-footer{align-items:start;flex-direction:column}}

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/* Keep long valid numbers and errors inside the existing responsive panels. */
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