:root {
  --fg: #1a1a1a;
  --bg: #ffffff;
  --muted: #555;
  --accent: #1f6feb;
  --border: #e5e5e5;
  --radius: 6px;
  --maxw: 640px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px 24px 96px;
}

h1 {
  font-size: 32px;
  line-height: 1.2;
  margin: 0 0 16px;
}
h2 {
  font-size: 22px;
  margin: 32px 0 12px;
}
p {
  margin: 0 0 16px;
}
ul {
  padding-left: 24px;
  margin: 0 0 24px;
}
li {
  margin-bottom: 8px;
}

.sub {
  color: var(--muted);
  font-size: 18px;
  margin-bottom: 32px;
}

.form {
  display: flex;
  gap: 8px;
  margin: 24px 0 16px;
}

.form input[type="email"] {
  flex: 1;
  padding: 12px 14px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.form button {
  padding: 14px 24px;
  font-size: 17px;
  font-weight: 600;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease;
}

.form button:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 4px 12px rgba(31, 111, 235, 0.25);
}

.form button:active {
  transform: translateY(1px) scale(0.98);
  transition-duration: 80ms;
}

.form button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.hp {
  position: absolute;
  left: -9999px;
} /* honeypot */

.credibility {
  color: var(--muted);
  font-size: 15px;
  margin-top: 32px;
}

footer {
  border-top: 1px solid var(--border);
  margin-top: 64px;
  padding-top: 24px;
  font-size: 14px;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  margin-right: 16px;
}

.check {
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  margin: 0 0 16px;
  background: #fafafa;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.check h3 {
  margin: 0 0 6px;
  font-size: 16px;
}
.check .why,
.check .how {
  margin: 4px 0;
  font-size: 15px;
  color: var(--muted);
}
.check .why::before {
  content: "Why: ";
  font-weight: 600;
  color: var(--fg);
}
.check .how::before {
  content: "How to verify: ";
  font-weight: 600;
  color: var(--fg);
}

/* --- Landing revamp 2026-05-16 --- */

.section {
  padding: 32px 0;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 300ms ease, transform 300ms ease;
}

.section + .section {
  border-top: 1px solid var(--border);
}

.section.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Hero is the first section — visible immediately, no fade-in needed */
.section.hero {
  opacity: 1;
  transform: none;
}

/* Fallback: if JS is disabled or IntersectionObserver unavailable,
   show all sections fully via a class added in <noscript> */
.no-motion .section {
  opacity: 1;
  transform: none;
}

.check-section-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 4px;
}

.cta-secondary {
  margin: 16px 0 0;
}

.cta-secondary button {
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 600;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease;
}

.cta-secondary button:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 4px 12px rgba(31, 111, 235, 0.25);
}

.cta-secondary button:active {
  transform: translateY(1px) scale(0.98);
  transition-duration: 80ms;
}

@media (max-width: 520px) {
  main {
    padding: 32px 16px 64px;
  }

  h1 {
    font-size: 26px;
  }

  .section {
    padding: 24px 0;
  }

  .form {
    flex-direction: column;
    align-items: stretch;
  }

  .form button {
    width: 100%;
  }
}