:root {
  --lime: #7FCE00;
  --lime-dark: #5FA000;
  --navy: #265478;
  --navy-dark: #1a3d58;
  --ink: #16293a;
  --muted: #5d7284;
  --bg: #f2f6f9;
  --card: #ffffff;
  --line: #d9e3ea;
  --danger: #b3261e;
  --warn-bg: #fff4d6;
  --warn-ink: #6b4a00;
  --radius: 16px;
  --font-title: "Bricolage Grotesque", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-text: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.45;
}

.topbar {
  background: #ffffff;
  border-bottom: 4px solid var(--lime);
  display: flex;
  justify-content: center;
  padding: 6px 16px;
}

.logo {
  display: block;
  height: 104px;
  width: auto;
  object-fit: contain;
}

.page {
  max-width: 520px;
  margin: 0 auto;
  padding: 20px 16px 8px;
}

.intro h1 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.15;
  color: var(--navy);
  margin: 0 0 8px;
}

.intro p {
  margin: 0 0 18px;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: 0 2px 10px rgba(38, 84, 120, 0.06);
}

.field { margin-bottom: 16px; }

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--navy);
}

.optional {
  font-weight: 400;
  color: var(--muted);
  font-size: 14px;
}

.input-wrap { position: relative; }

input[type="text"],
select {
  width: 100%;
  height: 52px;
  padding: 0 14px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 17px;
}

input[type="text"] { padding-right: 48px; }

select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'><path d='M1 1l6 6 6-6' fill='none' stroke='%23265478' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(38, 84, 120, 0.18);
}

input.invalid { border-color: var(--danger); }

.unit {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-weight: 600;
  pointer-events: none;
}

.form-error {
  margin: 0 0 12px;
  color: var(--danger);
  font-weight: 600;
}

.btn {
  display: block;
  width: 100%;
  min-height: 56px;
  padding: 14px 18px;
  border: 0;
  border-radius: 14px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 18px;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--lime);
  color: var(--navy-dark);
}

.btn-primary:active { background: var(--lime-dark); }

.btn-whatsapp {
  background: var(--navy);
  color: #fff;
  margin-top: 6px;
}

.btn-whatsapp:active { background: var(--navy-dark); }

.result { border-top: 5px solid var(--lime); }

.result-label {
  margin: 0;
  color: var(--muted);
  font-weight: 600;
}

.result-value {
  margin: 2px 0 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 56px;
  line-height: 1.05;
  color: var(--navy);
  word-break: break-word;
}

.result-value small {
  font-size: 22px;
  font-weight: 600;
  color: var(--muted);
}

.result-kw {
  margin: 4px 0 16px;
  color: var(--muted);
}

.result-kw strong { color: var(--navy); }

.boilers {
  background: var(--bg);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 16px;
}

.boilers-label {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  font-weight: 600;
}

.boilers-value {
  margin: 2px 0 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 20px;
  color: var(--navy);
}

.tips {
  margin: 10px 0 0;
  padding-left: 18px;
  font-size: 14px;
  color: var(--muted);
}

.tips li + li { margin-top: 4px; }

.summary {
  margin: 0 0 16px;
  border-top: 1px solid var(--line);
}

.summary div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.summary dt { color: var(--muted); }

.summary dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

.offer {
  background: #f1fae0;
  border: 1.5px solid var(--lime);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 14px;
}

.offer-title {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--navy);
}

.offer-text {
  margin: 4px 0 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 19px;
  color: var(--navy-dark);
}

.whatsapp-warning {
  margin: 10px 0 0;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--warn-bg);
  color: var(--warn-ink);
  font-size: 13px;
}

.disclaimer {
  margin: 4px 4px 0;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.footer {
  max-width: 520px;
  margin: 0 auto;
  padding: 18px 16px 28px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  opacity: 0.8;
}

[hidden] { display: none !important; }