/* landing.css — acmedev.com branded product landing page
 *
 * Brand: #3779B5 primary blue, #E1EFF2 teal bg, #12283C dark
 * No frameworks. Vanilla CSS.
 */

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

:root {
  --brand: #3779B5;
  --brand-dark: #255179;
  --brand-light: #73A6D4;
  --brand-pale: #B9D2EA;
  --teal: #90C4CF;
  --teal-bg: #E1EFF2;
  --teal-light: #F0F7F9;
  --dark: #12283C;
  --near-black: #181818;
  --text: #000000;
  --text-secondary: #404040;
  --text-muted: #808080;
  --white: #FFFFFF;
  --off-white: #FBFBFB;
  --border: #D1D1D1;
}

body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */

.nav {
  position: sticky;
  top: 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
}

.nav-brand {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--brand);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-powered {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0;
  margin-left: 6px;
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--brand);
}

.nav-signin {
  background: var(--brand);
  color: var(--white);
  border: none;
  border-radius: 6px;
  padding: 10px 24px;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s;
}

.nav-signin:hover {
  background: var(--brand-dark);
}

/* ── Hero ── */

.hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--brand-dark) 100%);
  color: var(--white);
  padding: 100px 32px 120px;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  max-width: 700px;
  margin: 0 auto 24px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.25rem;
  color: var(--brand-pale);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-cta {
  display: inline-block;
  background: var(--brand);
  color: var(--white);
  border-radius: 8px;
  padding: 16px 40px;
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}

.hero-cta:hover {
  background: var(--brand-light);
  transform: translateY(-1px);
}

/* ── Features ── */

.features {
  padding: 80px 32px;
  background: var(--teal-light);
}

.features-inner {
  max-width: 960px;
  margin: 0 auto;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 48px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--white);
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--teal-bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.6rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ── How It Works ── */

.how {
  padding: 80px 32px;
  background: var(--white);
}

.how-inner {
  max-width: 800px;
  margin: 0 auto;
}

.how h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 48px;
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.how-step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--brand);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
}

.step-text h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}

.step-text p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ── Social Proof / Stats ── */

.stats {
  padding: 60px 32px;
  background: var(--teal-bg);
}

.stats-inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 64px;
  text-align: center;
}

.stat h3 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--brand);
}

.stat p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── CTA Section ── */

.cta {
  padding: 80px 32px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: var(--white);
  text-align: center;
}

.cta h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.1rem;
  color: var(--brand-pale);
  max-width: 500px;
  margin: 0 auto 32px;
}

.cta-btn {
  display: inline-block;
  background: var(--white);
  color: var(--brand);
  border-radius: 8px;
  padding: 16px 40px;
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* ── Footer ── */

.footer {
  padding: 32px;
  background: var(--near-black);
  color: var(--text-muted);
  text-align: center;
  font-size: 0.85rem;
}

.footer a {
  color: var(--brand-light);
  text-decoration: none;
}

/* ── Responsive ── */

@media (max-width: 768px) {
  .hero { padding: 60px 20px 80px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1.05rem; }
  .feature-grid { grid-template-columns: 1fr; gap: 20px; }
  .stats-inner { flex-direction: column; gap: 24px; }
  .nav { padding: 12px 20px; }
  .nav-links { gap: 12px; }
  .nav-link { display: none; }
}