:root {
  --primary-color: #0a66ff;
  --accent-color: #1f2937;
  --bg-color: #f7f9fc;
  --surface-color: #ffffff;
  --text-color: #111827;
  --muted-text: #6b7280;
  --border-color: #e5e7eb;
  --success-bg: #eef6ff;
  --shadow: 0 10px 25px rgba(17, 24, 39, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-color) 100%);
}

a {
  color: inherit;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 1.5rem;
  align-items: center;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero__content {
  padding: 2rem;
}

.app-logo {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  object-fit: cover;
  display: block;
  margin-bottom: 1rem;
}

h1 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.7rem);
  line-height: 1.15;
}

.tagline {
  margin-top: 0.75rem;
  margin-bottom: 1.5rem;
  color: var(--muted-text);
  font-size: clamp(1rem, 2.1vw, 1.2rem);
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1rem;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s ease;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(17, 24, 39, 0.12);
}

.btn--primary {
  background: var(--primary-color);
  color: #ffffff;
}

.btn--secondary {
  background: #ffffff;
  color: var(--accent-color);
  border-color: var(--border-color);
}

.btn--block {
  width: 100%;
}

.is-disabled {
  pointer-events: none;
  opacity: 0.5;
  cursor: not-allowed;
}

.fallback-text {
  margin-top: 0.75rem;
  color: var(--muted-text);
}

.hero__media {
  align-self: stretch;
  min-height: 280px;
  background: #eef2ff;
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.qr-section {
  margin-top: 2rem;
}

.qr-section h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.qr-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.qr-card h3 {
  margin-top: 0;
  margin-bottom: 0.8rem;
}

.qr-image {
  display: block;
  width: min(220px, 100%);
  aspect-ratio: 1 / 1;
  margin: 1rem auto;
  border-radius: 12px;
  background: var(--success-bg);
}

.qr-download {
  display: inline-block;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.qr-caption {
  margin: 0;
  color: var(--muted-text);
  font-size: 0.95rem;
}

.footer {
  margin-top: 2.4rem;
  border-top: 1px solid var(--border-color);
  padding: 1.2rem 0 2rem;
  text-align: center;
  color: var(--muted-text);
}

.footer__links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-bottom: 0.6rem;
}

.footer__links a {
  text-decoration: none;
  color: var(--accent-color);
}

.is-hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero__media {
    min-height: 220px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(1120px, 94%);
    padding-top: 1rem;
  }

  .hero__content {
    padding: 1.2rem;
  }

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

  .btn {
    width: 100%;
  }
}