:root {
  --bg: #07090c;
  --surface: #0d1117;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.12);
  --mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, Segoe UI, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  height: 32px;
  width: auto;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 14px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 96px;
}

.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
}

.hero-kicker {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 16px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  max-width: 18ch;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
}

.btn:hover {
  border-color: #374151;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(1.06);
  border-color: var(--accent);
}

.meta-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  padding: 28px 0 8px;
  font-size: 13px;
}

.meta-item dt {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 6px;
}

.meta-item dd {
  margin: 0;
  font-weight: 500;
}

.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}

.section:last-of-type {
  border-bottom: none;
}

.section-label {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 12px;
}

.section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 28ch;
}

.section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 24px 0 8px;
}

.section p,
.section li {
  color: var(--muted);
  max-width: 68ch;
}

.section ul {
  padding-left: 1.2em;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 860px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 22px;
  background: var(--surface);
}

.card h3 {
  margin-top: 0;
}

.figure-caption {
  font-size: 13px;
  color: var(--muted);
  margin-top: 12px;
}

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
}

.steps li {
  position: relative;
  padding-left: 52px;
  margin-bottom: 28px;
  color: var(--muted);
}

.steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
}

.steps strong {
  color: var(--text);
  display: block;
  margin-bottom: 6px;
}

.faq-list {
  margin-top: 24px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  overflow: hidden;
  background: var(--surface);
}

.faq-item summary {
  padding: 16px 18px;
  cursor: pointer;
  font-weight: 500;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  font-family: var(--mono);
  color: var(--muted);
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-body {
  padding: 0 18px 16px;
  color: var(--muted);
  font-size: 15px;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.pill {
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 20px;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px 48px;
  max-width: 1080px;
  margin: 0 auto;
  font-size: 13px;
  color: var(--muted);
}

.site-footer a {
  color: var(--muted);
}

.radar-preview {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--accent-soft);
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.radar-preview canvas {
  width: 100%;
  max-width: 420px;
  height: auto;
  aspect-ratio: 1;
}

.note {
  font-size: 13px;
  border-left: 3px solid var(--accent);
  padding-left: 14px;
  margin-top: 20px;
  color: var(--muted);
}