:root {
  --bg: #0d1117;
  --bg-elev: #161b22;
  --bg-elev-2: #1c2230;
  --border: #2a313c;
  --text: #e6edf3;
  --text-dim: #9aa7b4;
  --brand: #4f8cff;
  --brand-strong: #2f6fe0;
  --brand-soft: rgba(79, 140, 255, 0.14);
  --success: #3fb950;
  --success-soft: rgba(63, 185, 80, 0.14);
  --warn: #d29922;
  --warn-soft: rgba(210, 153, 34, 0.14);
  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 1080px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
}

/* ---------- Layout ---------- */
.site {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main {
  flex: 1;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ---------- Nav ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

.nav-logo {
  display: inline-flex;
}

.nav-wordmark {
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-dim);
  font-weight: 500;
}

.nav-link:hover,
.nav-link-active {
  color: var(--text);
  text-decoration: none;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-brand {
  font-weight: 800;
  color: var(--text);
}

.footer-links {
  display: flex;
  gap: 1rem;
  margin-left: auto;
}

.footer-copy {
  width: 100%;
  opacity: 0.7;
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 4.5rem 1rem 3rem;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s;
}

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

.btn-primary:hover {
  background: var(--brand-strong);
  text-decoration: none;
}

.btn-secondary {
  background: var(--bg-elev-2);
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: #232b3a;
  text-decoration: none;
}

/* ---------- Sections ---------- */
.section {
  margin: 2rem 0;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-lead {
  color: var(--text-dim);
  max-width: 68ch;
}

/* ---------- Cards / grids ---------- */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
}

.card h3 {
  color: var(--brand);
  font-size: 1.05rem;
}

.card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}

/* ---------- Page header ---------- */
.page-header {
  margin-bottom: 1.5rem;
}

.page-header p {
  color: var(--text-dim);
  margin-top: -0.25rem;
  max-width: 68ch;
}

/* ---------- Product steps ---------- */
.steps {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  display: grid;
  gap: 1rem;
}

.steps li {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  background: var(--bg-elev);
}

.steps .step-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.steps .step-title .step-num {
  color: var(--brand);
  margin-right: 0.5rem;
}

.steps p {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin: 0;
}

/* ---------- Status / notice ---------- */
.status-band {
  border: 1px solid var(--warn);
  background: var(--warn-soft);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  color: var(--text);
}

.status-band p:last-child {
  margin-bottom: 0;
}

.status-band strong {
  color: var(--warn);
}

/* ---------- CTA band ---------- */
.cta-band {
  text-align: center;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  margin: 2rem 0;
}

.cta-band h2 {
  font-size: 1.4rem;
}

/* ---------- About ---------- */
.prose {
  max-width: 68ch;
}

.prose p {
  color: var(--text-dim);
}

.prose h2 {
  margin-top: 1.75rem;
  color: var(--text);
}

@media (max-width: 720px) {
  .nav-links {
    gap: 1rem;
  }
}