*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --blue:#1565D8;
  --blue-dark:#0F4FB5;
  --blue-light:#EBF2FF;
  --blue-border:#C7D9F8;
  --green:#0B6B3A;
  --green-light:#E6F4EC;
  --white:#FFFFFF;
  --off:#F6F8FB;
  --border:#DDE4EF;
  --text:#1B2033;
  --body:#4B5563;
  --muted:#9CA3AF;
  --red:#C0132A;
  --red-light:#FEF2F2;
  --amber:#92400E;
  --amber-light:#FFFBEB;
  --radius:12px;
}
html{font-size:16px}
body{
  font-family:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--off);
  color:var(--text);
  min-height:100vh;
  padding:40px 20px 80px;
  line-height:1.5;
}
.wrap{max-width:680px;margin:0 auto}

/* Header */
.header{text-align:center;margin-bottom:32px}
.header-logo{
  font-size:13px;font-weight:700;letter-spacing:0.06em;
  text-transform:uppercase;color:var(--blue);margin-bottom:14px;
}
.header h1{font-size:26px;font-weight:800;color:var(--text);margin-bottom:6px;letter-spacing:-0.02em}
.header p{font-size:15px;color:var(--body)}

/* Card shell */
.card{background:var(--white);border:1px solid var(--border);border-radius:16px;box-shadow:0 2px 12px rgba(0,0,0,0.06);overflow:hidden}

/* Progress */
.prog-wrap{padding:20px 28px 0}
.prog-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.prog-step{font-size:12px;font-weight:700;color:var(--blue);letter-spacing:0.04em;text-transform:uppercase}
.prog-total{font-size:12px;color:var(--muted)}
.prog-track{height:4px;background:var(--border);border-radius:2px;overflow:hidden}
.prog-fill{height:4px;background:var(--blue);border-radius:2px;transition:width 0.4s ease;width:0%}

/* Step */
.card-inner{padding:28px 28px 24px}
.step{display:none}.step.active{display:block}
.step-q{font-size:22px;font-weight:800;color:var(--text);text-align:center;margin-bottom:6px;letter-spacing:-0.02em;line-height:1.25}
.step-q span{color:var(--blue)}
.step-sub{font-size:14px;color:var(--body);text-align:center;margin-bottom:28px}

/* Choice grid */
.choice-grid{display:grid;gap:12px}
.choice-grid.col2{grid-template-columns:1fr 1fr}
.choice-grid.col3{grid-template-columns:1fr 1fr 1fr}
.choice-grid.col4{grid-template-columns:1fr 1fr 1fr 1fr}

.choice{
  border:2px solid var(--border);
  border-radius:var(--radius);
  padding:22px 14px 18px;
  cursor:pointer;
  background:var(--white);
  text-align:center;
  transition:border-color 0.15s,background 0.15s,transform 0.1s;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  position:relative;
  font-family:'DM Sans',inherit;
}
.choice:hover{border-color:var(--blue);background:var(--blue-light);transform:translateY(-1px)}
.choice.sel{border-color:var(--blue);background:var(--blue-light)}
.choice.sel .ch-label{color:var(--blue)}
.choice-icon{width:52px;height:52px;display:flex;align-items:center;justify-content:center}
.choice-icon svg{width:44px;height:44px}
.ch-label{font-size:15px;font-weight:700;color:var(--text)}
.ch-desc{font-size:12px;color:var(--muted);line-height:1.4}
.choice-tick{
  position:absolute;top:10px;right:10px;
  width:20px;height:20px;border-radius:50%;
  background:var(--blue);display:none;align-items:center;justify-content:center;
}
.choice.sel .choice-tick{display:flex}
.choice-tick svg{width:10px;height:10px}
.choice-badge{
  position:absolute;top:-1px;left:50%;transform:translateX(-50%);
  background:var(--blue);color:var(--white);
  font-size:10px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;
  padding:2px 10px;border-radius:0 0 6px 6px;
  white-space:nowrap;
}

/* Horizontal list options */
.list-opts{display:grid;gap:8px}
.list-opt{
  border:2px solid var(--border);border-radius:10px;
  padding:14px 18px;cursor:pointer;background:var(--white);
  display:flex;align-items:center;gap:14px;
  transition:border-color 0.15s,background 0.15s;
  font-family:'DM Sans',inherit;width:100%;text-align:left;
}
.list-opt:hover{border-color:var(--blue);background:var(--blue-light)}
.list-opt.sel{border-color:var(--blue);background:var(--blue-light)}
.lo-radio{
  width:20px;height:20px;min-width:20px;border-radius:50%;
  border:2px solid var(--border);transition:border-color 0.15s;
  display:flex;align-items:center;justify-content:center;
}
.list-opt.sel .lo-radio{border-color:var(--blue);background:var(--blue)}
.list-opt.sel .lo-radio::after{content:'';width:6px;height:6px;border-radius:50%;background:var(--white);display:block}
.lo-body{}
.lo-title{font-size:15px;font-weight:700;color:var(--text)}
.lo-desc{font-size:12px;color:var(--muted);margin-top:2px}
.list-opt.sel .lo-title{color:var(--blue)}

/* Buttons */
.cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;padding:15px;border-radius:10px;
  font-size:16px;font-weight:700;cursor:pointer;border:none;
  font-family:'DM Sans',inherit;transition:background 0.15s,opacity 0.15s;
  margin-top:24px;
}
.cta-blue{background:var(--blue);color:var(--white)}
.cta-blue:hover{background:var(--blue-dark)}
.cta-blue:disabled{opacity:0.45;cursor:not-allowed}
.cta-ghost{background:transparent;color:var(--muted);border:1.5px solid var(--border);font-size:14px;padding:11px;margin-top:10px}
.cta-ghost:hover{color:var(--text);border-color:var(--text)}

/* Alerts */
.alert{padding:16px 20px;border-radius:10px;margin-bottom:16px}
.alert-amber{background:var(--amber-light);border:1.5px solid #FDE68A}
.alert-red{background:var(--red-light);border:1.5px solid #FECACA}
.alert-green{background:var(--green-light);border:1.5px solid #A7D7BB}
.alert h3{font-size:14px;font-weight:800;margin-bottom:4px;color:var(--text)}
.alert-amber h3{color:var(--amber)}
.alert-red h3{color:var(--red)}
.alert-green h3{color:var(--green)}
.alert p{font-size:13px;color:var(--body);line-height:1.7}

/* Section heading inside step */
.sect-label{font-size:11px;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);margin:20px 0 8px}

/* Property step */
.prop-section{margin-bottom:18px}
.prop-section:last-child{margin-bottom:0}

/* Boiler cards */
.boiler-grid{display:grid;gap:10px}
.bc{
  border:2px solid var(--border);border-radius:var(--radius);
  padding:16px 18px;cursor:pointer;background:var(--white);
  transition:border-color 0.15s,background 0.15s;
  position:relative;
  display:flex;align-items:center;gap:16px;
}
.bc:hover{border-color:var(--blue)}
.bc.sel{border-color:var(--blue);background:var(--blue-light)}
.bc-img{
  width:80px;height:80px;min-width:80px;
  border-radius:8px;overflow:hidden;
  background:var(--off);
  border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
}
.bc-img img{width:100%;height:100%;object-fit:contain;padding:6px}
.bc-img-placeholder{
  width:100%;height:100%;
  display:flex;align-items:center;justify-content:center;
}
.bc-content{flex:1;min-width:0}
.bc-popular{
  position:absolute;top:-1px;right:16px;
  background:var(--blue);color:var(--white);
  font-size:10px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;
  padding:2px 10px;border-radius:0 0 6px 6px;
}
.bc-row{display:flex;justify-content:space-between;align-items:flex-start}
.bc-left{}
.bc-name{font-size:16px;font-weight:800;color:var(--text)}
.bc-kw{font-size:13px;color:var(--muted);font-weight:400}
.bc-tags{display:flex;gap:5px;flex-wrap:wrap;margin-top:6px}
.tag{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:700}
.tag-blue{background:var(--blue-light);color:var(--blue);border:1px solid var(--blue-border)}
.tag-green{background:var(--green-light);color:var(--green);border:1px solid #A7D7BB}
.tag-grey{background:var(--off);color:var(--muted);border:1px solid var(--border)}
.bc-price{text-align:right;white-space:nowrap}
.bc-amount{font-size:22px;font-weight:900;color:var(--blue)}
.bc-vat{font-size:11px;color:var(--muted);font-weight:400}
.bc-desc{font-size:13px;color:var(--body);margin-top:8px;line-height:1.5}
.bc-finance{display:inline-flex;align-items:center;gap:5px;margin-top:8px;font-size:11px;font-weight:700;color:var(--green);background:var(--green-light);border:1px solid #A7D7BB;padding:2px 8px;border-radius:4px}

/* Surcharge box */
.surch{background:var(--amber-light);border:1px solid #FDE68A;border-radius:8px;padding:10px 14px;margin-top:12px;font-size:12px;color:var(--amber);font-weight:600}

/* Form fields */
.fld{margin-bottom:14px}
.fld label{display:block;font-size:13px;font-weight:700;color:var(--text);margin-bottom:5px}
.fld label .req{color:var(--red)}
.fld input{
  width:100%;padding:11px 14px;
  border:1.5px solid var(--border);border-radius:8px;
  font-size:15px;color:var(--text);background:var(--white);
  font-family:'DM Sans',inherit;transition:border-color 0.12s,box-shadow 0.12s;
}
.fld input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(21,101,216,0.1)}
.fld-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.divider{height:1px;background:var(--border);margin:18px 0}

/* Consent */
.consent-item{display:flex;gap:10px;align-items:flex-start;margin-bottom:10px}
.consent-item input[type=checkbox]{width:16px;height:16px;min-width:16px;margin-top:3px;accent-color:var(--blue);cursor:pointer}
.consent-item label{font-size:12px;color:var(--body);cursor:pointer;line-height:1.6}
.consent-item a{color:var(--blue)}

/* Boiler confirm box */
.boiler-confirm{background:var(--blue-light);border:2px solid var(--blue-border);border-radius:var(--radius);padding:16px 18px;margin-bottom:18px}
.bconf-name{font-size:15px;font-weight:800;color:var(--text)}
.bconf-price{font-size:26px;font-weight:900;color:var(--blue);margin:4px 0 8px}
.bconf-price span{font-size:13px;font-weight:400;color:var(--muted)}

/* Summary */
.sum-box{background:var(--off);border:1px solid var(--border);border-radius:10px;padding:14px 18px;margin-top:16px}
.sum-row{display:flex;justify-content:space-between;font-size:13px;color:var(--body);padding:3px 0}
.sum-total{display:flex;justify-content:space-between;font-size:17px;font-weight:800;color:var(--text);border-top:1px solid var(--border);margin-top:8px;padding-top:10px}

/* Success */
.success-center{text-align:center;padding:8px 0 20px}
.success-circle{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 18px}
.success-circle.green{background:var(--green-light)}
.success-circle.blue{background:var(--blue-light)}
.success-center h2{font-size:22px;font-weight:900;letter-spacing:-0.02em;margin-bottom:6px}
.success-center p{font-size:14px;color:var(--body);margin-bottom:20px}

/* Site visit form */
.sv-head{font-size:16px;font-weight:800;color:var(--text);margin:20px 0 14px}

@media(max-width:520px){
  .choice-grid.col2,.choice-grid.col3,.choice-grid.col4{grid-template-columns:1fr 1fr}
  .fld-row{grid-template-columns:1fr}
  .card-inner{padding:20px 18px 18px}
  .prog-wrap{padding:16px 20px 0}
  .step-q{font-size:19px}
}
@media(max-width:380px){
  .choice-grid.col3,.choice-grid.col4{grid-template-columns:1fr 1fr}
}

/* ── Slim "not sure" option ── */
.choice-slim{
  display:flex;flex-direction:row;align-items:center;
  gap:12px;padding:12px 16px;
  width:100%;margin-top:0;
  text-align:left;
  border-radius:var(--radius);
  border:1.5px solid var(--border);
  background:var(--white);
  cursor:pointer;font-family:'DM Sans',inherit;
  transition:border-color 0.15s,background 0.15s;
}
.choice-slim:hover{border-color:var(--blue);background:var(--blue-light)}
.choice-slim.sel{border-color:var(--blue);background:var(--blue-light)}
.choice-slim .ch-label{color:var(--body);font-size:14px;font-weight:600}
.choice-slim.sel .ch-label{color:var(--blue)}
.choice-slim .choice-tick{min-width:20px}

/* ── Number choice (bedrooms/bathrooms) ── */
.choice-num{padding:18px 8px;justify-content:center}
.ch-num{font-size:22px;font-weight:900;color:var(--text)}
.choice-num.sel .ch-num{color:var(--blue)}

/* ── Radiator options ── */
.rad-opts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:4px}
.rad-opt{
  border:1.5px solid var(--border);border-radius:var(--radius);
  padding:20px 10px 16px;cursor:pointer;background:var(--white);
  display:flex;flex-direction:column;align-items:center;gap:8px;
  transition:border-color 0.15s,background 0.15s;
  font-family:'DM Sans',inherit;
}
.rad-opt:hover{border-color:var(--blue);background:var(--blue-light)}
.rad-opt.sel{border-color:var(--blue);background:var(--blue-light)}
.rad-label{font-size:16px;font-weight:800;color:var(--text)}
.rad-desc{font-size:12px;color:var(--muted)}
.rad-opt.sel .rad-label{color:var(--blue)}

/* ── Tooltip ── */
.info-tip{position:relative;display:inline-block;cursor:pointer}
.tip-text{
  display:none;position:absolute;bottom:calc(100% + 6px);left:50%;
  transform:translateX(-50%);
  background:var(--text);color:var(--white);
  font-size:12px;line-height:1.5;font-weight:400;
  padding:8px 12px;border-radius:6px;
  width:220px;text-align:left;z-index:10;
  box-shadow:0 2px 8px rgba(0,0,0,0.2);
}
.tip-text::after{
  content:'';position:absolute;top:100%;left:50%;transform:translateX(-50%);
  border:5px solid transparent;border-top-color:var(--text);
}
.info-tip.active .tip-text,.info-tip:focus .tip-text{display:block}

/* ── Surcharge notice (no prices) ── */
.surch{background:var(--off);border:1px solid var(--border);border-radius:var(--radius);padding:10px 14px;margin-top:12px;font-size:12px;color:var(--muted)}

@media(max-width:420px){
  .rad-opts{grid-template-columns:1fr}
  .choice-grid.col4{grid-template-columns:1fr 1fr}
}