:root {
    --c-bg: #ffffff;
    --c-fg: #1a1d24;
    --c-muted: #6b7280;
    --c-border: #e5e7eb;
    --c-accent: #0066ff;
    --c-accent-fg: #ffffff;
    --c-card: #f9fafb;
    --c-table-head: #f3f4f6;
    --r: 8px;
    --shadow: 0 1px 3px rgb(0 0 0 / 0.04);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--c-fg);
    background: var(--c-bg);
    margin: 0;
    line-height: 1.5;
    font-size: 16px;
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; }
h1 { font-size: 1.875rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.375rem; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.125rem; margin: 0 0 0.5rem; }
p { margin: 0 0 0.75rem; }
.muted { color: var(--c-muted); }
.lead { color: var(--c-muted); margin: 0 0 1.5rem; font-size: 1.05rem; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

.site-header {
    border-bottom: 1px solid var(--c-border);
    padding: 14px 0;
}
.site-header .container { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; }
.brand { font-weight: 600; font-size: 1.1rem; color: var(--c-fg); }
.brand:hover { text-decoration: none; }
.main-nav { display: flex; gap: 16px; }
.main-nav a { color: var(--c-fg); }

.site-main { padding: 24px 0 48px; }
.site-footer { border-top: 1px solid var(--c-border); padding: 18px 0; }
.site-footer p { margin: 0; font-size: 0.875rem; }

.crumbs { font-size: 0.875rem; color: var(--c-muted); margin: 0 0 12px; }
.crumbs a { color: var(--c-muted); }

.hero { background: var(--c-card); padding: 24px; border-radius: var(--r); margin-bottom: 24px; }

.calc { margin: 16px 0; }
.calc-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    align-items: end;
}
.calc-row label { display: flex; flex-direction: column; gap: 4px; font-size: 0.875rem; }
.calc-row label span { color: var(--c-muted); }
.calc-row input, .calc-row select {
    font: inherit;
    padding: 10px 12px;
    border: 1px solid var(--c-border);
    border-radius: var(--r);
    background: var(--c-bg);
}
.calc-row button {
    font: inherit;
    padding: 10px 18px;
    border: 0;
    border-radius: var(--r);
    background: var(--c-accent);
    color: var(--c-accent-fg);
    cursor: pointer;
    font-weight: 600;
}
.calc-row button:hover { filter: brightness(1.05); }
.calc-row button:disabled { opacity: 0.5; cursor: progress; }

.calc-options { margin-top: 14px; }
.calc-options summary { cursor: pointer; color: var(--c-accent); font-size: 0.95rem; }
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 8px;
    margin-top: 12px;
}
.options-grid label.option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid var(--c-border);
    border-radius: var(--r);
}
.options-grid input { width: 64px; text-align: right; padding: 4px 6px; border: 1px solid var(--c-border); border-radius: 4px; }

.calc-results { margin-top: 18px; }

.offer-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--c-bg);
    box-shadow: var(--shadow);
    border-radius: var(--r);
    overflow: hidden;
}
.offer-table th, .offer-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--c-border);
}
.offer-table th {
    background: var(--c-table-head);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--c-muted);
}
.offer-table tr:last-child td { border-bottom: 0; }
.offer-table td[data-price-for] { font-weight: 600; font-variant-numeric: tabular-nums; }

.block { margin: 32px 0; }

.cards {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
}
.cards .card {
    border: 1px solid var(--c-border);
    border-radius: var(--r);
    padding: 16px;
    background: var(--c-bg);
}
.cards .card a { color: var(--c-fg); display: block; }
.cards .card a:hover { text-decoration: none; }
.cards .card h3 { margin: 0 0 6px; color: var(--c-accent); }
.cards .card p { margin: 0; color: var(--c-muted); font-size: 0.9rem; }

.city-grid {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 6px;
}
.city-grid li a {
    display: block;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 0.9rem;
}
.city-grid li a:hover { background: var(--c-card); text-decoration: none; }

.prose { max-width: 70ch; }
.prose p { margin-bottom: 0.75rem; }

@media (max-width: 640px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.2rem; }
    .calc-row { grid-template-columns: 1fr; }
    .offer-table th:nth-child(3), .offer-table td:nth-child(3) { display: none; }
}