@import url('../styles.css');
.hvac-main{max-width:1120px;margin:auto;padding:5vw 6vw}.breadcrumb{color:var(--muted);font-size:.85rem}.hvac-main h1{font-size:clamp(2.6rem,6vw,5.5rem);line-height:1;letter-spacing:-.07em;max-width:850px}.intro{font-size:1.15rem;color:var(--muted);max-width:680px}.notice{border-left:4px solid var(--accent);padding:15px 20px;background:#fff;margin:30px 0;max-width:760px}.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:45px 0}.tool-card{background:#fff;border:1px solid var(--line);padding:25px;text-decoration:none;color:var(--ink)}.tool-card h2{margin:8px 0;font-size:1.35rem}.tool-card p{color:var(--muted)}.tool-card .tag{color:var(--accent);font-size:.72rem;font-weight:800;letter-spacing:.12em}.calculator{background:#fff;border:1px solid var(--line);padding:28px;max-width:760px}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.field label{display:block;font-weight:700;font-size:.9rem;margin-bottom:5px}.field input,.field select{width:100%;padding:11px;border:1px solid #b9c8c3;border-radius:2px;font:inherit;background:#fff}.calculator button{margin-top:25px;background:var(--ink);color:#fff;border:0;padding:13px 20px;font:inherit;font-weight:700;cursor:pointer}.result{margin-top:25px;padding:20px;background:#eef4ef;border:1px solid #c5d8cd}.result strong{font-size:1.7rem}.source{font-size:.82rem;color:var(--muted);margin-top:30px}.prose{max-width:760px}.prose h2{margin-top:45px;font-size:2rem}.prose li{margin:8px 0}@media(max-width:700px){.tool-grid,.form-grid{grid-template-columns:1fr}}