:root {
  --bg: #000000;
  --bg-raised: #111111;
  --border: #262626;
  --fg: #ffffff;
  --fg-muted: #a0a0a0;
  --accent: #f2b705;
  --accent-fg: #000000;
  --max-width: 1100px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

h1, h2, h3 {
  line-height: 1.2;
  font-weight: 700;
}

section {
  padding: 4rem 1.5rem;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.nav-cta {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.nav-cta:hover {
  border-color: var(--accent);
}

.hero {
  padding-top: 6rem;
  padding-bottom: 5rem;
  text-align: center;
}

.hero-inner {
  max-width: 760px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.hero-sub {
  color: var(--fg-muted);
  font-size: 1.1rem;
  max-width: 620px;
  margin: 0 auto 2.25rem;
}

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

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.75rem;
  border-radius: 8px;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--fg);
}

.btn-ghost:hover {
  border-color: var(--accent);
}

.features h2,
.how h2,
.contact h2 {
  text-align: center;
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  margin-bottom: 2.5rem;
}

.feature-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
}

.feature-icon {
  font-size: 1.75rem;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.feature h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.feature p {
  color: var(--fg-muted);
  font-size: 0.95rem;
}

.how {
  background: var(--bg-raised);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.how-steps {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.how-step {
  text-align: center;
}

.how-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 800;
  margin-bottom: 1rem;
}

.how-step h3 {
  margin-bottom: 0.5rem;
}

.how-step p {
  color: var(--fg-muted);
  font-size: 0.95rem;
}

.contact {
  text-align: center;
}

.contact p {
  color: var(--fg-muted);
  margin-bottom: 1.5rem;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

@media (max-width: 760px) {
  .feature-grid,
  .how-steps {
    grid-template-columns: 1fr;
  }
}