:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1d2230;
  --text: #f5f7fb;
  --muted: #aeb7c7;
  --border: #2a3142;
  --accent: #9fc1ff;
  --success: #b4f0c3;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 17, 21, 0.92);
  position: sticky;
  top: 0;
  backdrop-filter: blur(12px);
  z-index: 10;
}
.site-header .container,
.site-footer .container {
  padding: 18px 0;
}
.brand {
  font-weight: 700;
  color: var(--text);
}
.hero {
  padding: 56px 0 24px;
}
.hero-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1.15fr 0.85fr;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
}
.card h2, section h2 { margin-top: 0; }
.muted { color: var(--muted); }
form {
  display: grid;
  gap: 14px;
}
label { font-weight: 600; display: block; margin-bottom: 6px; }
input, select, button {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 13px 14px;
  font: inherit;
}
button {
  cursor: pointer;
  font-weight: 700;
}
.results-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.result-box {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  background: var(--panel-2);
}
.result-label {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
}
.result-value {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  margin-top: 4px;
}
section {
  padding: 16px 0;
}
.section-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
}
.example-table, .faq-table {
  width: 100%;
  border-collapse: collapse;
}
.example-table td, .example-table th,
.faq-table td, .faq-table th {
  border-top: 1px solid var(--border);
  padding: 12px 10px;
  text-align: left;
  vertical-align: top;
}
.example-table tr:first-child td,
.example-table tr:first-child th,
.faq-table tr:first-child td,
.faq-table tr:first-child th { border-top: none; }
.notice {
  font-size: 0.92rem;
  color: var(--muted);
}
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.checkbox-row input { width: auto; }
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 34px;
}
.footer-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr 0.7fr;
}
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-links li { margin-bottom: 12px; }
.footer-links span {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-meta {
  color: var(--muted);
  margin-top: 16px;
}
.ad-slot {
  min-height: 90px;
  border: 1px dashed var(--border);
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: var(--muted);
  background: rgba(255,255,255,0.02);
}
.breadcrumbs {
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: 12px;
}
.list-tight li { margin-bottom: 8px; }
@media (max-width: 860px) {
  .hero-grid, .footer-grid, .results-grid { grid-template-columns: 1fr; }
}