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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  background: #ffffff;
  color: #111;
}

.navbar {
  height: 78px;
  padding: 0 7%;
  position: sticky;
  top: 0;
  z-index: 1000;

  display: flex;
  justify-content: space-between;
  align-items: center;

  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;

  font-size: 22px;
  font-weight: 900;
}

.logo {
  width: 42px;
  height: 42px;

  display: grid;
  place-items: center;

  border-radius: 15px;
  background: linear-gradient(135deg, #000, #444);
  color: white;

  font-weight: 900;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.2);
}

nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

nav a {
  color: #333;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

button {
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: 0.25s ease;
}

nav button,
.primary,
.final-cta button {
  padding: 13px 22px;
  border-radius: 999px;
  background: #111;
  color: white;
  font-weight: 800;
}

button:hover {
  transform: translateY(-3px);
}

.hero {
  min-height: calc(100vh - 78px);
  padding: 110px 7%;

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  text-align: center;

  background:
    radial-gradient(circle at top, rgba(0, 0, 0, 0.07), transparent 35%),
    linear-gradient(#ffffff, #f7f7f8);
}

.badge,
.tag {
  display: inline-flex;

  padding: 10px 18px;
  border-radius: 999px;

  background: #f2f2f4;
  border: 1px solid #e2e2e5;

  color: #444;
  font-size: 13px;
  font-weight: 800;

  margin-bottom: 24px;
}

.hero h1 {
  max-width: 1150px;

  font-size: clamp(56px, 8vw, 120px);
  line-height: 0.92;
  letter-spacing: -5px;
  font-weight: 950;
}

.hero p {
  max-width: 850px;

  margin-top: 30px;

  color: #555;
  font-size: 21px;
  line-height: 1.7;
}

.hero-buttons {
  margin-top: 42px;

  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.secondary {
  padding: 13px 22px;

  border-radius: 999px;
  background: white;
  color: #111;

  border: 1px solid #ddd;
  font-weight: 800;
}

.primary {
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.18);
}

.overview {
  padding: 90px 7%;

  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;

  background: white;
}

.overview-card {
  padding: 32px;

  border-radius: 30px;

  background: #f7f7f8;
  border: 1px solid #ebebee;

  transition: 0.25s ease;
}

.overview-card:hover {
  transform: translateY(-6px);
  background: white;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.08);
}

.overview-card h2 {
  font-size: 28px;
  margin-bottom: 14px;
}

.overview-card p {
  color: #555;
  line-height: 1.65;
}

.product-section {
  padding: 120px 7%;

  background:
    radial-gradient(circle at top right, rgba(0, 0, 0, 0.06), transparent 30%),
    linear-gradient(#f8f8fa, #ffffff);
}

.dark-section {
  background: #111;
  color: white;
}

.section-content {
  max-width: 1200px;
  margin: 0 auto;
}

.dark-tag {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.16);
}

.product-section h2 {
  max-width: 1000px;

  font-size: clamp(48px, 7vw, 96px);
  line-height: 0.95;
  letter-spacing: -4px;

  margin-bottom: 28px;
}

.large-text {
  max-width: 900px;

  font-size: 22px;
  line-height: 1.7;

  color: #444;
}

.dark-section .large-text {
  color: #d6d6d6;
}

.claim-box {
  margin-top: 42px;
  padding: 34px;

  border-radius: 34px;

  background: white;
  border: 1px solid #e8e8eb;

  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.08);
}

.dark-box {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

.claim-box h3 {
  font-size: 30px;
  margin-bottom: 14px;
}

.claim-box p {
  font-size: 19px;
  line-height: 1.7;
  color: #444;
}

.dark-box p {
  color: #d0d0d0;
}

.feature-grid {
  margin-top: 28px;

  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.feature-grid div {
  padding: 26px;

  border-radius: 26px;

  background: rgba(255, 255, 255, 0.9);
  border: 1px solid #e8e8eb;
}

.dark-section .feature-grid div {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.1);
}

.feature-grid h4 {
  font-size: 20px;
  margin-bottom: 10px;
}

.feature-grid p {
  color: #555;
  line-height: 1.6;
}

.dark-section .feature-grid p {
  color: #c9c9c9;
}

.final-cta {
  padding: 120px 7%;

  text-align: center;

  background:
    radial-gradient(circle at center, rgba(0, 0, 0, 0.08), transparent 35%),
    #ffffff;
}

.final-cta h2 {
  max-width: 1000px;
  margin: 0 auto;

  font-size: clamp(46px, 7vw, 90px);
  line-height: 0.95;
  letter-spacing: -4px;
}

.final-cta p {
  max-width: 760px;
  margin: 26px auto 36px;

  font-size: 20px;
  line-height: 1.7;
  color: #555;
}

footer {
  padding: 34px 7%;
  text-align: center;
  color: #777;
  background: #fff;
}

@media (max-width: 1050px) {
  .overview {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 760px) {
  nav a {
    display: none;
  }

  .hero h1,
  .product-section h2,
  .final-cta h2 {
    letter-spacing: -3px;
  }

  .overview,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .navbar {
    padding: 0 5%;
  }

  .hero,
  .product-section,
  .final-cta {
    padding-left: 5%;
    padding-right: 5%;
  }
}