/* Mobile-first ad landing page – join.onlinecardshow.com */

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: #1a1a1a;
  background: #f8f9fa;
}

main {
  max-width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 1.5rem 0 2rem;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-logo {
  display: block;
  width: 80px;
  height: 80px;
  margin: 0 auto 1.25rem;
  border-radius: 0.5rem;
  object-fit: cover;
}

.hero-headline {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  color: #0f172a;
}

.hero-subheadline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: #475569;
  margin: 0 0 0.5rem;
  max-width: 32ch;
  margin-left: auto;
  margin-right: auto;
}

.hero-promo {
  font-size: 0.9rem;
  font-weight: 500;
  color: #64748b;
  margin: 0 0 2rem;
}

.cta {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border-radius: 0.5rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.cta:focus {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
}

.cta-primary {
  padding: 1rem 2rem;
  font-size: 1.2rem;
  background: #2563eb;
  color: #fff;
  border: none;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}

.cta-primary:hover {
  background: #1d4ed8;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
  transform: translateY(-1px);
}

.trust-line {
  font-size: 0.875rem;
  color: #64748b;
  margin: 0.75rem 0 2rem;
}

/* Screenshot */
.screenshot-wrap {
  margin: 2rem auto;
  display: flex;
  justify-content: center;
  align-items: center;
}

.screenshot {
  max-width: min(900px, 100%);
  width: 100%;
  height: auto;
  border-radius: 0.75rem;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.06);
  display: block;
}

.cta-secondary {
  margin-top: 1rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  background: #1e293b;
  color: #fff;
}

.cta-secondary:hover {
  background: #334155;
  transform: translateY(-2px) scale(1.02);
}

/* Features */
.features {
  padding: 2.5rem 0;
}

.features-heading {
  font-size: clamp(1.35rem, 4vw, 1.75rem);
  font-weight: 700;
  text-align: center;
  margin: 0 0 1.5rem;
  color: #0f172a;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature {
  background: #fff;
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: #0f172a;
}

.feature-desc {
  font-size: 0.9375rem;
  color: #475569;
  margin: 0;
}

/* Bottom CTA */
.cta-section {
  text-align: center;
  padding: 2.5rem 1rem;
  background: #f1f5f9;
  border-radius: 0.75rem;
  margin-top: 1rem;
}

.cta-heading {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 700;
  margin: 0 0 1.25rem;
  color: #0f172a;
}

.cta-section .cta-primary {
  margin: 0;
}