:root { color-scheme: light; --ink: #18202a; --muted: #68717d; --line: #d9dee5; --soft-line: #e9edf1; --surface: #fff; --page: #f2f4f6; --accent: #145c55; --accent-hover: #0e4944; --error: #a72b2b; }
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--page); font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.4; }
button, input, select { font: inherit; }
.quote-app { width: min(980px, calc(100% - 40px)); margin: 36px auto; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); box-shadow: 0 18px 48px rgba(24, 32, 42, .08); }
.app-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 32px; border-bottom: 1px solid var(--line); background: linear-gradient(105deg, #fff 0%, #fff 25%, #d8dcde 50%, #172127 85%); }
.app-logo { display: block; width: 76px; height: auto; flex: 0 0 auto; }
.app-header-copy { min-width: 0; }
.app-header h1 { margin: 0; font-size: clamp(1.55rem, 3vw, 2rem); letter-spacing: -.025em; }
.app-header p { margin: 4px 0 0; color: var(--muted); }
.workspace { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, 1fr); }
.form-panel, .summary-panel { padding: 26px 32px 29px; }
.form-panel { border-right: 1px solid var(--line); }
.summary-panel { background: #fbfcfc; }
.section-title, .calculation-parameters legend { margin: 0 0 20px; color: #4d5763; font-size: .76rem; font-weight: 750; letter-spacing: .11em; text-transform: uppercase; }
.form-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.full-width { grid-column: 1 / -1; }
label { display: grid; gap: 7px; color: #303945; font-size: .88rem; font-weight: 650; }
input, select { width: 100%; min-height: 44px; padding: 9px 12px; border: 1px solid #cbd1d8; border-radius: 7px; color: var(--ink); background: #fff; outline: none; transition: border-color 150ms, box-shadow 150ms; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(20, 92, 85, .12); }
input::placeholder { color: #9aa2ab; }
.checkbox-field { display: flex; align-items: center; width: fit-content; min-height: 28px; gap: 9px; cursor: pointer; }
.checkbox-field input { width: 18px; min-height: 18px; accent-color: var(--accent); }
.calculation-parameters { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0 0; padding: 23px 0 0; border: 0; border-top: 1px solid var(--soft-line); }
.calculation-parameters legend { grid-column: 1 / -1; width: 100%; margin-bottom: 2px; padding: 0; }
.errors { margin-top: 18px; color: var(--error); font-size: .84rem; }
.errors:empty { display: none; }
.errors ul { margin: 0; padding-left: 20px; }
button { width: 100%; min-height: 46px; margin-top: 20px; padding: 10px 16px; border: 0; border-radius: 7px; color: #fff; background: var(--accent); font-size: .78rem; font-weight: 750; letter-spacing: .075em; text-transform: uppercase; cursor: pointer; transition: background 150ms, transform 150ms; }
button:hover { background: var(--accent-hover); }
button:active { transform: translateY(1px); }
.empty-result { display: grid; min-height: 420px; place-content: center; justify-items: center; color: var(--muted); text-align: center; }
.empty-result span { display: grid; width: 52px; height: 52px; margin-bottom: 15px; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--accent); background: #fff; font-size: 1.35rem; font-weight: 700; }
.empty-result p { margin: 0; }
.result-header { padding: 14px 0 26px; text-align: center; }
.result-price { display: block; color: var(--accent); font-size: clamp(2.2rem, 5vw, 3.15rem); font-weight: 780; letter-spacing: -.045em; }
.result-label { display: block; margin-top: 2px; color: var(--muted); font-size: .7rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
.result-meta { margin: 17px 0 0; color: #46515d; font-size: .92rem; }
.result-group { margin-top: 21px; }
.result-group h3 { margin: 0 0 9px; color: #59636f; font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; }
.result dl { margin: 0; }
.result dl > div { display: flex; justify-content: space-between; gap: 20px; padding: 7px 0; }
.result dt { color: #4f5965; }
.result dd { margin: 0; color: var(--ink); text-align: right; font-variant-numeric: tabular-nums; }
.result .subtotal, .result .total { margin-top: 8px; padding-top: 13px; border-top: 1px solid var(--line); font-weight: 750; }
.result .total { color: var(--accent); font-size: 1.04rem; }
.result .unit-price { margin-top: 13px; color: #46515d; font-weight: 700; }
@media (max-width: 560px) {
  .quote-app { width: min(100% - 24px, 980px); margin: 12px auto; }
  .app-header { gap: 14px; padding: 16px 20px; }
  .app-logo { width: 62px; }
}