:root {
  color-scheme: dark;
  font-family: Inter, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #111827;
  background: #f8fafc;
  --bg: #ffffff;
  --surface: #f1f5f9;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

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

button,
a {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(248, 250, 252, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.16);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  font-weight: 700;
  color: #111827;
  text-decoration: none;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.9rem 1.6rem;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

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

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 18px 50px rgba(37, 99, 235, 0.12);
}

.btn-secondary {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
}

.section-hero {
  padding: 4rem 0 3rem;
}

.hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin: 0.5rem 0 1rem;
  line-height: 1.05;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--primary);
  font-size: 0.75rem;
}

.hero-text,
.feature-card p,
.about-grid p,
.testimonial-card p {
  color: var(--muted);
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.hero-card {
  background: var(--bg);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.08);
}

.card-top {
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.card-stats {
  display: grid;
  gap: 1rem;
}

.card-stats div {
  background: var(--surface);
  padding: 1rem;
  border-radius: 1rem;
}

.card-stats strong {
  display: block;
  font-size: 1.35rem;
}

.section-features,
.section-about,
.section-contact {
  padding: 4rem 0;
}

.feature-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.feature-card {
  background: var(--bg);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.feature-card h3 {
  margin-top: 0;
}

.about-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.4fr 1fr;
  align-items: center;
}

.about-stats {
  display: grid;
  gap: 1rem;
}

.about-stats div {
  background: var(--surface);
  padding: 1.4rem 1.5rem;
  border-radius: 1.25rem;
}

.about-stats strong {
  display: block;
  font-size: 2rem;
}

.section-testimonial {
  padding: 3rem 0;
}

.testimonial-card {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2rem;
}

.testimonial-card strong {
  display: block;
  margin-top: 1.2rem;
}

.contact-card {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  background: var(--primary);
  color: white;
  border-radius: var(--radius);
  padding: 2rem;
}

.site-footer {
  padding: 1.75rem 0 2rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

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

@media (max-width: 840px) {
  .header-inner,
  .footer-inner,
  .about-grid,
  .contact-card {
    flex-direction: column;
    align-items: flex-start;
  }

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

@media (max-width: 600px) {
  .nav-links {
    display: none;
  }

  .hero-copy h1 {
    font-size: 2.5rem;
  }
}