.gt-hero{padding:72px 0 54px;border-bottom:1px solid #24343d;background:linear-gradient(135deg,#0d1519,#090d0f)}.gt-hero h1{font-size:clamp(42px,6vw,70px);margin:8px 0}.gt-group{margin-bottom:42px}.gt-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:15px}.gt-card{display:flex;gap:16px;padding:22px;background:#0f171b;border:1px solid #273740;border-radius:16px;text-decoration:none;color:#fff;transition:.18s}.gt-card:hover{border-color:#ff6b00;transform:translateY(-2px);box-shadow:0 12px 35px rgba(0,0,0,.25)}.gt-card h2{font-size:21px;margin:0 0 8px}.gt-card p{color:#9cb0bb;line-height:1.55}.gt-card strong{color:#ff7614}.gt-icon{font-size:27px}.gt-tool-shell{background:#0f171b;border:1px solid #273740;border-radius:18px;padding:28px}.gt-form{display:grid;grid-template-columns:1fr 1fr;gap:15px}.gt-form label{display:flex;flex-direction:column;gap:7px}.gt-form input{padding:14px;background:#081014;border:1px solid #30424c;border-radius:9px;color:#fff}.joule-result{padding:28px;margin-top:20px;border-radius:14px;background:#0a1115}.joule-result b{display:block;font-size:52px;color:#ff6b00}.joule-result span{color:#9cb0bb}.gt-empty{padding:40px;border:1px dashed #33454f;border-radius:14px}@media(max-width:850px){.gt-grid{grid-template-columns:1fr 1fr}}@media(max-width:560px){.gt-grid,.gt-form{grid-template-columns:1fr}}