.bz-fuel-calculator{max-width:850px;margin:25px auto;font-family:inherit;background:#fff;border:1px solid #e8e8e8;border-radius:18px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.06)}
.bzfc-header{padding:28px;background:linear-gradient(135deg,#123c2f,#1f6b50);color:#fff}.bzfc-header h2{margin:0 0 8px;font-size:28px}.bzfc-header p{margin:0;opacity:.92}
.bzfc-section,.bzfc-advanced{padding:22px 26px;border-bottom:1px solid #eee}.bzfc-section h3{margin-top:0}
.bz-fuel-calculator label{display:block;font-weight:650;margin:12px 0 7px;color:#333}
.bz-fuel-calculator input,.bz-fuel-calculator select{width:100%;box-sizing:border-box;padding:13px;border:1px solid #d7d7d7;border-radius:9px;font-size:16px;background:#fff}
.bzfc-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.bzfc-tabs{display:flex;gap:8px;margin:8px 0 15px;flex-wrap:wrap}.bzfc-tab,.bzfc-advanced button{border:1px solid #ddd;background:#f7f7f7;padding:10px 14px;border-radius:8px;cursor:pointer;font-weight:600}.bzfc-tab.active{background:#1f6b50;color:#fff;border-color:#1f6b50}
.bzfc-calculate{display:block;width:calc(100% - 52px);margin:24px 26px;padding:16px;border:0;border-radius:10px;background:#e85d04;color:#fff;font-size:17px;font-weight:700;cursor:pointer}
.bzfc-error{color:#b42318;padding:0 26px 15px;font-weight:600}.bzfc-result-title{font-size:24px;font-weight:800;padding:24px 26px 8px}.bzfc-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:12px 26px 24px}.bzfc-card{background:#f5f8f6;padding:16px;border-radius:12px}.bzfc-card span{display:block;font-size:13px;color:#666;margin-bottom:7px}.bzfc-card strong{font-size:20px;color:#163b2e}
.bzfc-breakdown,.bzfc-insight,.bzfc-scenarios{margin:12px 26px;padding:18px;border:1px solid #eee;border-radius:12px}.bzfc-breakdown h3,.bzfc-insight h3,.bzfc-scenarios h3{margin-top:0}.bzfc-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid #eee}.bzfc-row:last-child{border-bottom:0}.bzfc-row.highlight{font-weight:800;color:#b54708}.bzfc-insight{background:#fff8e8;border-color:#f3d18b}.bzfc-insight p{line-height:1.6;margin-bottom:0}.bzfc-scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.bzfc-scenario-grid div{background:#f7f7f7;border-radius:9px;padding:12px}.bzfc-scenario-grid span{display:block;font-size:13px;color:#666}.bzfc-scenario-grid b{font-size:18px}.bzfc-share{margin:14px 26px 28px;padding:12px 18px;border:1px solid #1f6b50;border-radius:9px;background:#fff;color:#1f6b50;font-weight:700;cursor:pointer}
@media(max-width:650px){.bzfc-header h2{font-size:22px}.bzfc-grid{grid-template-columns:1fr}.bzfc-cards{grid-template-columns:1fr 1fr;padding:12px 16px 20px}.bzfc-section,.bzfc-advanced{padding:18px 16px}.bzfc-calculate{width:calc(100% - 32px);margin:18px 16px}.bzfc-breakdown,.bzfc-insight,.bzfc-scenarios{margin:12px 16px}.bzfc-result-title{padding:20px 16px 8px}.bzfc-scenario-grid{grid-template-columns:1fr}.bzfc-share{margin-left:16px}}