.vch-wrap,.vch-calculator{max-width:1000px;margin:20px auto;font-family:inherit}
.vch-intro{text-align:center;margin-bottom:30px}.vch-intro h1{margin-bottom:8px}
.vch-category{margin:28px 0}.vch-category h2{font-size:1.35rem;margin-bottom:14px}
.vch-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.vch-card{display:flex;justify-content:space-between;align-items:center;padding:18px;border:1px solid #ddd;border-radius:10px;text-decoration:none;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.vch-card:hover{transform:translateY(-2px);box-shadow:0 5px 14px rgba(0,0,0,.09)}.vch-card-title{font-weight:600}.vch-arrow{font-size:20px}
.vch-calculator{padding:24px;border:1px solid #ddd;border-radius:12px;background:#fff;box-sizing:border-box}
.vch-calculator h1{margin-top:0}.vch-label{display:block;margin:14px 0;font-weight:600}
.vch-input{display:block;width:100%;box-sizing:border-box;margin-top:7px;padding:11px;border:1px solid #bbb;border-radius:7px;font-size:16px;background:#fff}
.vch-btn{margin-top:8px;padding:12px 20px;border:0;border-radius:7px;cursor:pointer;font-weight:700}
.vch-result{margin-top:20px;padding:16px;border-radius:8px;background:#f5f5f5;font-size:17px;line-height:1.7}
.vch-note{margin-top:18px;font-size:13px;opacity:.75}
@media(max-width:600px){.vch-calculator{padding:16px}.vch-grid{grid-template-columns:1fr}}