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

:root {
  --bg: #0b0f14;
  --bg-alt: #111820;
  --surface: #19202a;
  --border: #252d3a;
  --text: #e2e6ed;
  --text-muted: #8b95a5;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --radius: 8px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.logo img {
  height: 28px;
  filter: invert(1);
}

.logo-foot {
  height: 22px;
  filter: invert(1);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.15s;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* Hero */
.hero {
  padding: 160px 0 100px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 36px;
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 40px;
}

/* Card Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  margin-top: 32px;
}

.step {
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 50%;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Audience */
.audience-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.audience-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* CTA */
.section-cta {
  text-align: center;
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}

.section-cta p {
  color: var(--text-muted);
  margin: 8px 0 32px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 600px) {
  .hero {
    padding: 120px 0 60px;
  }

  .section {
    padding: 56px 0;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }
}