:root {
  color-scheme: light;
  --blue: #1c78d0;
  --sky: #63b7f2;
  --yellow: #fdd23e;
  --red: #e85b42;
  --ink: #17324d;
  --paper: #fff8d6;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
}

.hero {
  min-height: 92vh;
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(280px, 1fr);
  gap: 48px;
  align-items: center;
  padding: 28px clamp(20px, 6vw, 80px) 48px;
  background:
    linear-gradient(90deg, rgba(99, 183, 242, 0.96), rgba(253, 210, 62, 0.9)),
    var(--sky);
}

.nav {
  position: absolute;
  top: 18px;
  right: clamp(20px, 6vw, 80px);
  display: flex;
  gap: 16px;
  font-size: 15px;
  font-weight: 800;
}

.nav a {
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.hero-copy {
  padding-top: 42px;
}

.app-icon {
  width: 82px;
  height: 82px;
  border-radius: 20px;
  box-shadow: 0 16px 30px rgba(23, 50, 77, 0.2);
}

h1 {
  margin: 24px 0 12px;
  font-size: clamp(48px, 10vw, 104px);
  line-height: 0.92;
  letter-spacing: 0;
  color: var(--white);
  text-shadow: 0 4px 0 rgba(28, 120, 208, 0.45);
}

.tagline {
  max-width: 620px;
  margin: 0 0 26px;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.2;
  font-weight: 900;
}

.intro {
  max-width: 590px;
  margin: 0;
  font-size: 19px;
  line-height: 1.55;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 3px solid var(--red);
  border-radius: 8px;
  background: var(--yellow);
  color: var(--blue);
  font-size: 16px;
  font-weight: 900;
  text-decoration: none;
}

.button.secondary {
  border-color: var(--blue);
  background: var(--white);
  color: var(--red);
}

.logo-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo {
  width: min(100%, 410px);
  max-height: 74vh;
  object-fit: contain;
  border-radius: 28px;
  box-shadow: 0 28px 60px rgba(23, 50, 77, 0.28);
}

.section {
  padding: 56px clamp(20px, 6vw, 80px);
}

.section h2,
.content h1 {
  margin: 0 0 20px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1;
  letter-spacing: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature {
  min-height: 150px;
  padding: 22px;
  border: 3px solid rgba(28, 120, 208, 0.22);
  border-radius: 8px;
  background: var(--white);
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 22px;
  letter-spacing: 0;
}

.feature p,
.content p,
.content li {
  font-size: 18px;
  line-height: 1.55;
}

.content {
  max-width: 850px;
  margin: 0 auto;
  padding: 56px 20px 72px;
}

.content header {
  margin-bottom: 34px;
}

.content h2 {
  margin-top: 34px;
  font-size: 26px;
}

.content ul {
  padding-left: 22px;
}

.footer {
  padding: 26px clamp(20px, 6vw, 80px);
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  border-top: 3px solid rgba(23, 50, 77, 0.12);
  background: var(--white);
  font-weight: 800;
}

.footer nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

@media (max-width: 820px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 78px;
  }

  .nav {
    left: 20px;
    right: 20px;
    justify-content: flex-end;
  }

  .logo {
    width: min(86vw, 340px);
    max-height: none;
  }

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