*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #ffffff;
  --surface: #f9fafb;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --accent: #3b5bdb;
  --accent-bg: #eef2ff;
  --radius: 12px;
  --max-w: 600px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding: 0 1.25rem;
}

main,
footer {
  max-width: var(--max-w);
  margin: 0 auto;
}

/* ── Hero ── */
.hero {
  padding: 4rem 0 2.5rem;
  text-align: center;
}

h1 {
  font-size: clamp(1.875rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.subheadline {
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Mock ── */
.mock {
  margin: 2.5rem 0;
}

.mock-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow: hidden;
}

.mock-screenshot {
  flex: 0 0 auto;
  width: 110px;
}

.mock-screenshot-inner {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 0.625rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}

.mock-bar {
  width: 55%;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  margin-bottom: 0.6rem;
}

.mock-line {
  height: 5px;
  background: #e9ecef;
  border-radius: 3px;
  margin-bottom: 0.4rem;
}
.mock-line:last-child { margin-bottom: 0; }
.mock-line.long   { width: 100%; }
.mock-line.medium { width: 72%; }
.mock-line.short  { width: 48%; }

.mock-label {
  display: block;
  text-align: center;
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.mock-arrow {
  font-size: 1.4rem;
  color: var(--accent);
  flex: 0 0 auto;
}

.mock-caption {
  flex: 1;
  min-width: 0;
}

.mock-caption-inner {
  background: var(--accent-bg);
  border-radius: 8px;
  padding: 0.875rem;
}

.mock-tag {
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.mock-caption-inner p {
  font-size: 0.8125rem;
  color: var(--text);
  line-height: 1.55;
  font-style: italic;
}

/* ── Value props ── */
.props {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 2.5rem 0;
}

.prop {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.prop-check {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  background: var(--accent-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  position: relative;
}

.prop-check::after {
  content: '';
  position: absolute;
  width: 9px;
  height: 5px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg) translateY(-1px);
}

.prop strong {
  display: block;
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 0.2rem;
}

.prop p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ── CTA ── */
.cta {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  margin: 2.5rem 0;
  text-align: center;
}

.cta h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 480px) {
  .form-row {
    flex-direction: row;
  }
}

input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  outline: none;
  font-family: inherit;
  color: var(--text);
  background: #ffffff;
  transition: border-color 0.15s;
  min-width: 0;
}

input[type="email"]::placeholder {
  color: #9ca3af;
}

input[type="email"]:focus {
  border-color: var(--accent);
}

button[type="submit"] {
  padding: 0.75rem 1.375rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
  transition: opacity 0.15s, transform 0.1s;
}

button[type="submit"]:hover {
  opacity: 0.88;
}

button[type="submit"]:active {
  transform: scale(0.98);
}

button[type="submit"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.privacy-note {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

#form-status {
  min-height: 1.25rem;
  margin-top: 0.5rem;
}

.success-msg {
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  padding: 0.75rem 0 0.25rem;
}

.error-msg {
  font-size: 0.8125rem;
  color: #dc2626;
}

/* ── Footer ── */
footer {
  padding: 1.5rem 0 3.5rem;
  text-align: center;
}

footer p {
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ── Accessibility ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}