:root{--bg:#fbfaf7;--fg:#24211d;--muted:#5f5850;--accent:#9b3d2e;--accent-fg:#fff;--card:#fff;--line:#e4ded4;--ok:#2f6b4f}
@media (prefers-color-scheme:dark){:root{--bg:#1b1916;--fg:#f1ede6;--muted:#b9b0a4;--accent:#e08a74;--accent-fg:#1b1916;--card:#25221e;--line:#3b362f;--ok:#7cc4a0}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent)}
.wrap{max-width:880px;margin:0 auto;padding:0 16px}
header.site{border-bottom:1px solid var(--line);background:var(--card)}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding-top:12px;padding-bottom:12px}
.logo{font-weight:700;font-size:1.15rem;text-decoration:none;color:var(--fg)}
nav a{margin-left:14px;text-decoration:none;color:var(--muted)}nav a:hover,nav a[aria-current]{color:var(--accent)}
main{padding:28px 0 48px}
h1{font-size:1.9rem;line-height:1.2;margin:.2em 0 .5em}h2{margin-top:1.8em}
.lead{font-size:1.15rem;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px}
.card h3{margin:.1em 0 .4em}
.btn{display:inline-block;background:var(--accent);color:var(--accent-fg);padding:10px 18px;border-radius:8px;border:0;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
.btn[disabled],.btn[aria-disabled=true]{opacity:.55;cursor:not-allowed}
form.calc{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;align-items:end}
label{display:flex;flex-direction:column;font-weight:600;font-size:.92rem;gap:4px}
input,select{font:inherit;padding:8px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--fg);min-width:0}
.result{margin-top:16px;padding:14px 16px;border-left:4px solid var(--ok);background:var(--card);border-radius:6px}
.result:empty{display:none}
.error{border-left-color:var(--accent)}
table{border-collapse:collapse;width:100%;margin:10px 0}th,td{border-bottom:1px solid var(--line);padding:7px 6px;text-align:left}
.table-scroll{overflow-x:auto}
.note{font-size:.9rem;color:var(--muted)}
footer.site{border-top:1px solid var(--line);padding:20px 0;font-size:.9rem;color:var(--muted)}
footer.site a{color:var(--muted);margin-right:12px}
.price{font-size:1.6rem;font-weight:700}
.signup form{display:flex;flex-wrap:wrap;gap:8px}.signup input{flex:1 1 220px}