:root {
  --bg: #0f1115; --panel: #171a21; --border: #262b36; --text: #e8eaf0;
  --dim: #9aa3b2; --green: #7ee08a; --blue: #6db3f2; --accent: #e5a158;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 880px; margin: 0 auto; padding: 24px 16px 64px; }
header.site { max-width: 880px; margin: 0 auto; padding: 16px; display: flex; gap: 16px; align-items: baseline; flex-wrap: wrap; }
header.site a { color: var(--dim); text-decoration: none; }
header.site a:hover, header.site a:focus { color: var(--text); }
header.site .brand { color: var(--text); font-weight: 700; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 12px 0; }
h2 { margin-top: 36px; }
a { color: var(--blue); }
a:focus, button:focus, input:focus, select:focus { outline: 2px solid var(--blue); outline-offset: 2px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px 20px; margin: 14px 0; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.num { color: var(--green); font-weight: 700; }
label { display: block; margin-top: 12px; color: var(--dim); }
input, select { width: 100%; max-width: 320px; padding: 10px 12px; margin-top: 4px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font-size: 1rem; }
button { margin-top: 16px; padding: 10px 18px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel); color: var(--text); font-size: 1rem; cursor: pointer; }
button:hover { border-color: var(--blue); }
.result { font-size: 1.4rem; margin-top: 16px; }
.ad-slot { min-height: 90px; border: 1px dashed var(--border); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--dim); font-size: 0.85rem; margin: 22px 0; }
footer.site { max-width: 880px; margin: 0 auto; padding: 24px 16px; color: var(--dim); border-top: 1px solid var(--border); font-size: 0.9rem; }
.cta { display: inline-block; background: var(--blue); color: #0b0d11; font-weight: 700; padding: 12px 20px; border-radius: 8px; text-decoration: none; margin-top: 10px; }
.cta:hover { filter: brightness(1.1); }
ul.checks { padding-left: 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { position: static; }
table { border-collapse: collapse; width: 100%; margin: 12px 0; }
td, th { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
header.site nav { display: flex; gap: 16px; flex-wrap: wrap; }