:root { --bg: #f7f6f3; --ink: #1d1b19; --muted: #5d5851; --line: #dcd7cf; --accent: #8a5a3c; --accent-ink: #fff; --card: #fff; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
header.top { display: flex; align-items: center; gap: 16px; padding: 12px 0; flex-wrap: wrap; }
header.top .brand { font-weight: 700; font-size: 1.25rem; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 8px; }
header.top nav { display: flex; gap: 16px; margin-left: auto; align-items: center; flex-wrap: wrap; }
header.top nav a:not(.cta) { color: var(--muted); text-decoration: none; }
.cta { display: inline-block; background: var(--accent); color: var(--accent-ink) !important; padding: 9px 16px; border-radius: 8px; font-weight: 600; text-decoration: none; border: 0; font-size: 1rem; cursor: pointer; }
.cta:hover { filter: brightness(1.1); }
.crumbs { font-size: 0.9rem; color: var(--muted); margin: 8px 0; }
.crumbs a { color: var(--muted); }
h1 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); line-height: 1.2; margin: 8px 0 12px; }
h2 { font-size: 1.35rem; margin: 32px 0 10px; }
h3 { font-size: 1.05rem; margin: 18px 0 6px; }
.lead { color: var(--muted); max-width: 75ch; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 420px) minmax(0, 1fr); gap: 24px; align-items: start; margin: 16px 0; }
.hero-grid > img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
table { border-collapse: collapse; width: 100%; background: var(--card); border: 1px solid var(--line); border-radius: 8px; font-size: 0.95rem; }
th, td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
caption { text-align: left; font-weight: 600; padding: 6px 0; caption-side: top; }
.downloads { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; list-style: none; padding: 0; margin: 12px 0; }
.downloads a { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; text-decoration: none; color: var(--ink); }
.downloads a:hover { border-color: var(--accent); }
.downloads small { display: block; color: var(--muted); }
.note { background: #fff7e8; border: 1px solid #ecd9b3; border-radius: 8px; padding: 8px 12px; font-size: 0.92rem; }
.grid { list-style: none; margin: 12px 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.grid a { display: flex; flex-direction: column; gap: 4px; text-decoration: none; color: var(--ink); font-size: 0.9rem; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 8px; height: 100%; }
.grid a:hover { border-color: var(--accent); }
.grid img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 6px; background: var(--card); }
.grid small { color: var(--muted); }
form.calc { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.calc-fields, .calc-params { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-bottom: 10px; }
form.calc label { display: flex; flex-direction: column; font-size: 0.85rem; color: var(--muted); gap: 2px; }
form.calc input, form.calc select { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); background: #fff; min-width: 0; }
.calc-status { margin-left: 10px; color: var(--muted); font-size: 0.9rem; }
.result { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 8px; margin: 14px 0; }
.result > div { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; }
.result dt { color: var(--muted); font-size: 0.82rem; }
.result dd { margin: 0; font-size: 1.15rem; }
.scroll { overflow-x: auto; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 16px; margin: 8px 0; }
summary { cursor: pointer; font-weight: 600; }
.site-footer { color: var(--muted); font-size: 0.9rem; padding-top: 32px; padding-bottom: 32px; }
@media (max-width: 800px) { .hero-grid { grid-template-columns: 1fr; } }