:root {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  color: #101828;
  background-color: #f4f7fb;
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: #f4f7fb;
  color: #101828;
}

a {
  color: inherit;
  text-decoration: none;
}

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

header {
  background: #fff;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
  position: sticky;
  top: 0;
  z-index: 10;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a:focus {
  color: #3b82f6;
}

.btn {
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: #fff;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 15px 30px rgba(37, 99, 235, 0.25);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.btn:hover,
.btn:focus {
  transform: translateY(-1px);
  box-shadow: 0 20px 35px rgba(37, 99, 235, 0.35);
}

.btn-outline {
  background: transparent;
  color: #1d4ed8;
  border: 1px solid rgba(29, 78, 216, 0.35);
  box-shadow: none;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  align-items: center;
  padding: 4rem 3rem 5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.1rem;
  color: #475467;
}

.hero-card {
  background: #fff;
  padding: 2.5rem;
  border-radius: 1.5rem;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
}

.section {
  padding: 4rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

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

.card {
  background: #fff;
  padding: 2rem;
  border-radius: 1.25rem;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.card h3 {
  margin-top: 0;
}

.pricing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.pricing-plan {
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 1.25rem;
  padding: 2rem;
  background: #fff;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.pricing-plan ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.pricing-plan li {
  margin-bottom: 0.5rem;
  color: #475467;
}

footer {
  background: #0f172a;
  color: #f8fafc;
  padding: 3rem;
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.footer-bottom {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: #cbd5f5;
}

.flowing-button {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 20;
}

.flowing-button .btn {
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
  100% {
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero,
  .section {
    padding: 3rem 1.5rem;
  }
}