:root{--bg:#f2f5f4;--card:#fff;--text:#183c46;--muted:#5b7077;--brand:#335c68;--brand2:#204955;--line:#d9e3e3;--ok:#eaf5ef;--warn:#fff6e4;--danger:#fff0ee}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--bg);font-family:Arial,Helvetica,sans-serif;color:var(--text);line-height:1.55}a{color:var(--brand)}.topbar{background:#fff;border-bottom:1px solid var(--line)}.topbar-inner{max-width:1140px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;gap:20px}.logo{width:210px;height:auto;display:block}.top-contact{font-size:13px;text-align:right}.top-contact a{display:block;font-size:18px;font-weight:700;text-decoration:none}.hero{background:#e5eeed;position:relative;overflow:hidden}.hero-inner{max-width:1140px;margin:auto;padding:54px 24px 48px;display:grid;grid-template-columns:1.6fr 1fr;gap:60px;align-items:center}.eyebrow{text-transform:none;font-size:11px;letter-spacing:2px;font-weight:700;color:var(--brand);margin:0 0 14px}h1{font-size:clamp(32px,4.5vw,52px);line-height:1.08;letter-spacing:-1.8px;margin:0 0 20px;font-weight:700}h1 span{color:#547b84}.hero-copy{font-size:16px;max-width:530px;margin:0;color:#4c666e}.hero-aside{padding:28px;border-left:1px solid #b8cecf}.hero-aside strong{display:block;font-size:20px;margin-bottom:16px}.benefit{display:flex;gap:12px;font-size:14px;margin:12px 0}.benefit b{color:#335c68}.section-nav{position:sticky;top:0;z-index:5;background:#fff;border-bottom:1px solid var(--line)}.section-nav div{max-width:1140px;margin:auto;display:flex;padding:0 24px;gap:30px}.section-nav a{display:flex;align-items:center;gap:9px;padding:17px 0;text-decoration:none;color:var(--muted);font-size:13px;font-weight:700}.section-nav a:hover{color:var(--brand2)}.section-nav span{display:grid;place-items:center;background:#eaf0ef;border-radius:50%;width:25px;height:25px;font-size:11px}main{max-width:1092px;margin:34px auto;padding:0 24px 50px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:30px;margin-bottom:22px;box-shadow:0 4px 20px #173b4505}h2{font-size:23px;letter-spacing:-.5px;margin:0 0 10px;color:var(--brand2)}h3{font-size:18px;margin:0 0 20px;color:var(--brand)}.section-description{margin:0 0 24px;color:var(--muted);font-size:14px}.section-number{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;background:#e9f0ef;color:var(--brand);border-radius:10px;font-size:13px;vertical-align:middle;margin-right:10px;letter-spacing:0}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}label{display:block;font-size:13px;font-weight:700;margin-bottom:8px}input,select,textarea{width:100%;font:inherit;font-size:15px;color:var(--text);min-height:48px;padding:12px 14px;background:#fff;border:1px solid #becdce;border-radius:8px;transition:border-color .15s,box-shadow .15s}input:hover,select:hover,textarea:hover{border-color:var(--brand)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px #335c6826}input[type=checkbox]{min-height:0;width:19px;height:19px;flex:0 0 19px;accent-color:var(--brand)}.checkbox{display:flex;align-items:center;gap:10px;line-height:1.45;min-height:48px;font-weight:500;background:#f0f5f4;border-radius:8px;padding:10px;margin:0}.room{background:#fbfcfc;border:1px solid var(--line);border-radius:12px;margin-top:18px;padding:24px;border-top:3px solid #738f98}.room h3{display:flex;align-items:center;gap:10px}.room h3:before{content:'';width:10px;height:10px;border:2px solid var(--brand);border-radius:2px}.small{font-size:13px;color:var(--muted)}.privacy-note{background:#f1f5f4;padding:18px;border-radius:10px;font-size:13px;color:var(--muted);margin-bottom:22px}.privacy-note a{font-weight:700}.submit-title{font-size:24px}.primary{width:100%;border:0;border-radius:8px;background:var(--brand);color:white;min-height:56px;padding:16px 20px;font:inherit;font-weight:700;cursor:pointer;transition:background .15s,transform .15s}.primary:hover{background:#204955}.primary:active{transform:translateY(1px)}.primary:disabled{opacity:.6;cursor:wait}.submit-hint{text-align:center;margin:12px 0 0;font-size:12px;color:var(--muted)}.alert{padding:15px 18px;border-radius:8px;margin:14px 0;font-size:14px}.warn{background:var(--warn);color:#765521}.danger{background:var(--danger);color:#963829}.ok{background:var(--ok);color:#235d43}.result{border-top:4px solid var(--brand)}.price{font-size:clamp(32px,5vw,48px);letter-spacing:-1.6px;font-weight:700;line-height:1.2;color:var(--brand);margin:18px 0 6px}.price-note{font-size:13px;color:var(--muted);margin-bottom:22px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:13px;margin-top:12px}th,td{text-align:left;padding:15px 10px;border-bottom:1px solid var(--line);vertical-align:top}thead th{background:#edf3f2;font-size:11px;text-transform:uppercase;letter-spacing:.5px}td.num,th.num{text-align:right;white-space:nowrap}tfoot tr:last-child{background:#e9f1ef;font-size:16px}.site-footer{background:#0f3540;color:#d5e1e4;padding:32px 24px;text-align:center;font-size:13px}.site-footer a{color:#fff;margin:0 12px}.site-footer strong{display:block;font-size:19px;color:#fff;margin-bottom:12px}.hidden{display:none!important}.hp-field{position:absolute!important;left:-10000px!important;top:auto!important;width:1px!important;height:1px!important;overflow:hidden!important}:focus-visible{outline:3px solid #738f98;outline-offset:4px}.skip-link{position:absolute;top:-100px;left:12px;background:white;padding:12px;z-index:20}.skip-link:focus{top:10px}@media(max-width:760px){.hero-inner{grid-template-columns:1fr;gap:22px;padding:32px 20px}.hero-aside{border-left:0;border-top:1px solid #b8cecf;padding:18px 0 0}.hero-aside strong{font-size:17px;margin-bottom:10px}.benefit{margin:6px 0}.topbar-inner{padding:14px 20px}.logo{width:170px}.top-contact{font-size:11px}.top-contact a{font-size:13px}.section-nav div{gap:0;justify-content:space-between;padding:0 16px}.section-nav a{font-size:11px;gap:5px;padding:13px 0}.section-nav span{width:21px;height:21px}.grid,.grid3{grid-template-columns:1fr;gap:16px}main{padding:0 14px 28px;margin:20px auto}.card{padding:22px 18px;border-radius:12px}.room{padding:18px 14px}h2{font-size:20px}.hero-copy{font-size:15px}th,td{padding:12px 8px}table{min-width:550px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.feedback-box{background:#edf3f2;padding:24px;border-radius:12px;margin:24px 0}.feedback-box h3{margin-bottom:8px}.secondary{background:white;color:var(--brand);border:1px solid var(--brand)}.secondary:hover{background:#dae7e5}.feedback-choice{font-size:14px;line-height:1.45;height:100%}
.device-outdoor{margin-top:18px;padding:16px;border:1px solid rgba(51,92,104,.22);border-radius:12px;background:#f8fbfb}.legal-confirm{display:grid;gap:10px;margin:18px 0}.legal-confirm .checkbox{align-items:flex-start}.room select.r-indoor{width:100%}

textarea{resize:vertical}

/* Explicit model choice follows the existing AiR controls. */
.manual-choice{padding:18px;margin:16px 0 24px;border:1px solid #b7c9c8;border-radius:10px;background:#f5f8f7}
.model-switch{display:flex;align-items:center;gap:12px;cursor:pointer;position:relative}
.model-switch input{position:absolute;opacity:0;width:44px;height:26px;margin:0}
.switch-track{display:inline-block;flex:0 0 44px;width:44px;height:26px;border-radius:20px;background:#9bacae;position:relative}
.switch-track:after{content:'';position:absolute;width:20px;height:20px;top:3px;left:3px;background:white;border-radius:50%;transition:transform .15s}
.model-switch input:checked+.switch-track{background:#335c68}.model-switch input:checked+.switch-track:after{transform:translateX(18px)}
.model-switch input:focus-visible+.switch-track{outline:3px solid #335c68;outline-offset:3px}
.r-model-wrap{margin:12px 0}.load-inputs-disabled{opacity:.6}
.ar-panel{margin:14px 0;padding:14px;background:#f3f7f6;border-radius:8px}.ar-qr{width:160px;height:160px;display:block;background:#fff;margin:10px 0}.ar-qr-wrap{display:block}
@media(max-width:700px){.ar-qr-wrap{display:none}}
.model-switch input[type=checkbox]{z-index:1;left:0;width:44px;height:26px;cursor:pointer}.model-switch input:disabled{cursor:wait}

.expert-mode .r-info-row .r-pump-field{grid-column:2 / -1;padding-top:28px}
@media(max-width:760px){.expert-mode .r-info-row .r-pump-field{grid-column:auto;padding-top:0}}

.room-photo-card{margin:16px 0;padding:16px;border:1px solid var(--line);border-radius:8px;background:#fbfcfc}.room-photo-card .remove-photo{margin-top:8px}#arPreview{margin:0 0 22px}#ar-model{max-width:100%}

/* Keep all five section links visible on small screens. */
@media(max-width:760px){html{scroll-padding-top:140px}.section-nav div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:8px}.section-nav a{min-height:44px;padding:8px 0}.section-nav span{flex-shrink:0}}