* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: #ffffff;
  color: #000000;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.site-header {
  width: 100%;
  padding: 20px;
  position: sticky;
  top: 0;
  background: #ffffff;
  z-index: 10;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #000000;
}

.logo svg,
.logo img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
}

.logo span {
  font-size: 1.4rem;
  font-weight: 700;
  color: #e63946;
}

.page-content {
  width: min(100%, 900px);
  padding: 40px 24px 60px;
}

.hero {
  text-align: left;
  margin-bottom: 36px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.25rem, 3vw, 3.5rem);
  color: #e63946;
  line-height: 1.05;
}

.subtitle {
  margin: 16px 0 0;
  max-width: 720px;
  font-size: 1.05rem;
  line-height: 1.8;
}

.info-card,
.download-card {
  background: #f8f8f8;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 24px;
}

.info-card h2,
.download-card h2 {
  margin-top: 0;
  color: #000000;
}

.info-card p,
.download-card p {
  line-height: 1.8;
  margin: 16px 0 0;
}

.download-button {
  display: inline-block;
  margin-top: 20px;
  padding: 14px 22px;
  background: #e63946;
  color: #ffffff;
  text-decoration: none;
  border-radius: 999px;
  font-weight: 700;
}

.download-button:hover,
.download-button:focus-visible {
  background: #b92d3e;
}

@media (max-width: 640px) {
  .page-content {
    padding: 28px 18px 40px;
  }

  .info-card,
  .download-card {
    padding: 22px;
  }
}