:root {
  color-scheme: light;
  --bg: #f7f9fb;
  --ink: #111827;
  --muted: #5f6875;
  --line: #dce3e9;
  --panel: #ffffff;
  --soft: #edf3f6;
  --dark: #101827;
  --blue: #317dcc;
  --blue-soft: #eaf3fc;
  --green: #238653;
  --red: #b53535;
  --radius: 8px;
  --shadow: 0 18px 48px rgba(16, 24, 39, .11);
  font-family: "Open Sans", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--bg); font-size: 16px; line-height: 1.5; }
body.modal-open { overflow: hidden; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
[hidden] { display: none!important; }

.calculator-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 70px;
  padding: 13px clamp(18px, 4vw, 56px);
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.calculator-brand { color: var(--ink); font-weight: 900; text-decoration: none; }
.calculator-header nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 18px; color: var(--muted); font-size: .94rem; }
.calculator-header nav a { text-decoration: none; }
.calculator-header nav a:hover, .calculator-header nav a[aria-current="page"] { color: var(--blue); }

.calculator-intro { padding: clamp(48px, 7vw, 84px) clamp(18px, 4vw, 56px) 40px; background: var(--soft); }
.calculator-intro > div { max-width: 1180px; margin: 0 auto; }
.eyebrow { margin: 0 0 10px; color: var(--blue); font-weight: 800; letter-spacing: 0; }
h1, h2, h3 { margin: 0; font-family: Ubuntu, Arial, sans-serif; line-height: 1.12; letter-spacing: 0; }
h1 { max-width: 900px; font-size: clamp(2.2rem, 5vw, 4.7rem); }
h2 { font-size: clamp(1.55rem, 2.5vw, 2.35rem); }
h3 { font-size: 1rem; }
.calculator-intro p:last-child { max-width: 760px; margin: 20px 0 0; color: var(--muted); font-size: 1.12rem; }

.page-notice { display: flex; gap: 12px; max-width: 1180px; margin: 24px auto 0; padding: 16px 18px; border: 1px solid #aad9bd; border-radius: var(--radius); background: #edf9f1; color: #17633c; }
.page-notice strong { white-space: nowrap; }

.calculator-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 390px);
  align-items: start;
  gap: 28px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 42px clamp(18px, 4vw, 56px) 90px;
}
.calculator-steps { display: grid; gap: 26px; min-width: 0; }
.calculator-step { padding: clamp(20px, 3vw, 30px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: 0 10px 32px rgba(16, 24, 39, .055); }
.step-heading { display: grid; grid-template-columns: auto 1fr; gap: 15px; align-items: start; }
.step-heading > span { min-width: 58px; padding: 7px 10px; border-radius: 6px; background: var(--dark); color: #fff; text-align: center; font-size: .78rem; font-weight: 900; }
.step-heading p { max-width: 720px; margin: 9px 0 0; color: var(--muted); }

.sale-options, .purchase-options { display: grid; gap: 12px; margin-top: 24px; }
.sale-options { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.purchase-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.option-card { position: relative; display: flex; flex-direction: column; min-width: 0; min-height: 100%; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: border-color .16s ease, box-shadow .16s ease, background .16s ease; }
.option-card:hover { border-color: #9fb8cc; }
.option-card.is-selected { border-color: var(--blue); background: var(--blue-soft); box-shadow: 0 0 0 2px rgba(49,125,204,.12); }
.option-card__main { display: grid; grid-template-columns: 22px minmax(0, 1fr); align-items: start; gap: 12px; flex: 1; padding: 18px 18px 12px; cursor: pointer; }
.option-card input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.option-control { display: grid; place-items: center; width: 22px; height: 22px; margin-top: 1px; border: 2px solid #8d9aa7; border-radius: 50%; background: #fff; }
.option-control--checkbox { border-radius: 5px; }
.option-card input:checked + .option-control { border-color: var(--blue); background: var(--blue); }
.option-card input:checked + .option-control::after { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #fff; }
.option-card input:checked + .option-control--checkbox::after { width: 9px; height: 5px; border: solid #fff; border-width: 0 0 2px 2px; border-radius: 0; transform: rotate(-45deg) translateY(-1px); }
.option-card input:focus-visible + .option-control { outline: 3px solid rgba(49,125,204,.24); outline-offset: 3px; }
.option-copy { display: grid; gap: 8px; min-width: 0; color: var(--muted); font-size: .92rem; }
.option-copy small { color: var(--green); font-size: .82rem; font-weight: 800; }
.option-title { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; color: var(--ink); }
.option-title strong { font-size: 1.04rem; }
.option-title b { flex: 0 0 auto; color: var(--blue); white-space: nowrap; }
.option-link { align-self: flex-start; margin: 0 18px 16px 52px; color: var(--blue); font-size: .88rem; font-weight: 800; text-decoration: none; }
.option-link:hover { text-decoration: underline; }
.selection-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 20px; }
.selection-actions button { padding: 9px 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--blue); background: #fff; font-weight: 800; cursor: pointer; }
.selection-actions button:hover, .selection-actions button:focus-visible { border-color: var(--blue); outline: none; background: var(--blue-soft); }

.calculation-panel { position: sticky; top: 92px; padding: 25px; border: 1px solid #cfd9e2; border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.calculation-panel > h2 { font-size: 1.75rem; }
.empty-calculation { margin: 22px 0 4px; padding: 15px; border-radius: 6px; color: var(--muted); background: var(--soft); }
.estimate-group { margin-top: 22px; }
.estimate-group h3 { padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.estimate-group ul { display: grid; gap: 8px; margin: 10px 0 0; padding: 0; list-style: none; }
.estimate-group li { display: flex; justify-content: space-between; gap: 15px; color: var(--muted); }
.estimate-group li span:last-child { color: var(--ink); white-space: nowrap; }
.subtotal-list, .payment-list { display: grid; gap: 8px; margin: 20px 0 0; }
.subtotal-list div, .payment-list div { display: flex; justify-content: space-between; gap: 16px; }
.subtotal-list dt, .payment-list dt { color: var(--muted); }
.subtotal-list dd, .payment-list dd { margin: 0; font-weight: 800; white-space: nowrap; }
.grand-total { display: grid; gap: 5px; margin-top: 20px; padding: 16px; border-radius: 7px; color: #fff; background: var(--dark); }
.grand-total span { color: rgba(255,255,255,.7); font-size: .82rem; font-weight: 800; text-transform: uppercase; }
.grand-total strong { font-size: clamp(1.8rem, 4vw, 2.35rem); line-height: 1; }
.payment-note { margin: 18px 0 0; color: var(--muted); font-size: .84rem; }
.calculation-actions { display: grid; grid-template-columns: 1.35fr 1fr; gap: 9px; margin-top: 22px; }
.calculation-actions .primary-button { grid-column: 1 / -1; }
.primary-button, .secondary-button { min-height: 46px; padding: 11px 14px; border-radius: 7px; font-weight: 850; cursor: pointer; }
.primary-button { border: 1px solid var(--blue); color: #fff; background: var(--blue); }
.primary-button:hover, .primary-button:focus-visible { border-color: #2769ab; background: #2769ab; outline: 3px solid rgba(49,125,204,.2); }
.primary-button:disabled { border-color: #aeb9c3; background: #aeb9c3; cursor: not-allowed; }
.secondary-button { border: 1px solid var(--line); color: var(--ink); background: #fff; }
.secondary-button:hover, .secondary-button:focus-visible { border-color: var(--blue); color: var(--blue); outline: none; }
.copy-status { min-height: 20px; margin: 9px 0 0; color: var(--green); font-size: .84rem; }

.mobile-total { display: none; }
.request-modal { position: fixed; inset: 0; z-index: 60; display: grid; place-items: center; padding: 18px; }
.request-modal__backdrop { position: absolute; inset: 0; background: rgba(16,24,39,.68); }
.request-modal__dialog { position: relative; width: min(100%, 560px); max-height: calc(100vh - 36px); overflow: auto; padding: 28px; border-radius: var(--radius); background: #fff; box-shadow: 0 24px 80px rgba(0,0,0,.28); }
.request-modal__dialog > p:not(.eyebrow) { color: var(--muted); }
.modal-close { position: absolute; top: 14px; right: 14px; display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); background: #fff; font-size: 1.55rem; line-height: 1; cursor: pointer; }
.request-form { display: grid; gap: 15px; margin-top: 22px; }
.request-form > label { display: grid; gap: 6px; font-weight: 800; }
.request-form label small { color: var(--muted); font-weight: 400; }
.request-form input, .request-form textarea { width: 100%; min-height: 48px; padding: 11px 12px; border: 1px solid #bdc9d2; border-radius: 7px; color: var(--ink); background: #fff; }
.request-form textarea { min-height: 104px; resize: vertical; }
.request-form input:focus, .request-form textarea:focus { border-color: var(--blue); outline: 3px solid rgba(49,125,204,.15); }
.form-trap { position: absolute!important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-legal { color: var(--muted); font-size: .82rem; }
.consent-field { display: grid!important; grid-template-columns: 20px 1fr; gap: 10px!important; align-items: start; color: var(--ink); font-weight: 500!important; }
.consent-field input { width: 20px; height: 20px; min-height: 0; margin: 2px 0 0; accent-color: var(--blue); }
.form-legal p { margin: 8px 0 0 30px; }
.form-legal a { color: var(--blue); }
.form-message { padding: 12px 14px; border-radius: 6px; }
.form-message--error { border: 1px solid #e4b2b2; color: var(--red); background: #fff1f1; }

.calculator-footer { display: flex; justify-content: space-between; gap: 20px; padding: 26px clamp(18px, 4vw, 56px); color: rgba(255,255,255,.72); background: var(--dark); }
.calculator-footer a { color: #fff; text-decoration: none; }

@media (max-width: 1040px) {
  .calculator-layout { grid-template-columns: 1fr; }
  .calculation-panel { position: static; }
  .sale-options { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  body { padding-bottom: 78px; }
  .calculator-header { position: static; align-items: flex-start; flex-direction: column; gap: 8px; }
  .calculator-header nav { justify-content: flex-start; gap: 9px 15px; }
  .calculator-header nav a:nth-child(3) { display: none; }
  .calculator-intro { padding-top: 38px; }
  .calculator-layout { padding-top: 24px; padding-bottom: 36px; }
  .calculator-step { padding: 19px 15px; }
  .step-heading { grid-template-columns: 1fr; }
  .step-heading > span { justify-self: start; }
  .purchase-options { grid-template-columns: 1fr; }
  .option-title { flex-direction: column; gap: 4px; }
  .option-card__main { padding: 16px 14px 10px; }
  .option-link { margin-left: 48px; }
  .calculation-panel { padding: 21px 17px; scroll-margin-top: 12px; }
  .calculation-actions { grid-template-columns: 1fr; }
  .calculation-actions .primary-button { grid-column: auto; }
  .mobile-total { position: fixed; left: 0; right: 0; bottom: 0; z-index: 45; display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 70px; padding: 10px 14px calc(10px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: rgba(255,255,255,.97); box-shadow: 0 -8px 30px rgba(16,24,39,.12); }
  .mobile-total div { display: grid; line-height: 1.15; }
  .mobile-total span { color: var(--muted); font-size: .75rem; }
  .mobile-total strong { font-size: 1.18rem; }
  .mobile-total a { padding: 10px 12px; border-radius: 6px; color: #fff; background: var(--blue); font-size: .84rem; font-weight: 800; text-decoration: none; }
  .request-modal { align-items: end; padding: 0; }
  .request-modal__dialog { width: 100%; max-height: 92vh; padding: 24px 17px calc(24px + env(safe-area-inset-bottom)); border-radius: 8px 8px 0 0; }
  .calculator-footer { flex-direction: column; }
}

@media (max-width: 360px) {
  h1 { font-size: 2rem; }
  .mobile-total { gap: 8px; padding-left: 10px; padding-right: 10px; }
  .mobile-total a { padding-left: 9px; padding-right: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .option-card { transition: none; }
}