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

:root {
  --green: #34C759;
  --green-dark: #2aA84A;
  --blue: #007AFF;
  --blue-dark: #0062cc;
  --text: #1C1C1E;
  --text-sub: #6E6E73;
  --bg: #FFFFFF;
  --bg-alt: #F5F5F7;
  --border: #D1D1D6;
  --radius: 16px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 100px;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
  cursor: pointer;
  border: none;
}

.btn:active { transform: scale(0.97); }

.btn-small {
  background: var(--blue);
  color: #fff;
  font-size: 0.875rem;
  padding: 8px 18px;
}

.btn-small:hover { background: var(--blue-dark); }

.btn-large {
  background: var(--blue);
  color: #fff;
  font-size: 1.05rem;
  padding: 14px 28px;
}

.btn-large:hover { background: var(--blue-dark); }

.btn-white {
  background: #fff;
  color: var(--blue);
}

.btn-white:hover { background: #f0f4ff; }

/* ── Hero ── */
.hero {
  padding: 80px 0 60px;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text);
}

.lead {
  font-size: 1.15rem;
  color: var(--text-sub);
  margin-bottom: 32px;
  max-width: 480px;
}

.sub {
  margin-top: 12px;
  font-size: 0.875rem;
  color: var(--text-sub);
}

/* ── App screenshot ── */
.hero-image {
  display: flex;
  justify-content: center;
}

.app-screenshot {
  width: 300px;
  display: block;
}

/* ── Features ── */
.features {
  background: var(--bg-alt);
  padding: 80px 0;
}

.features h2, .how h2, .cta h2 {
  text-align: center;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.55;
}

/* ── How it works ── */
.how {
  padding: 80px 0;
}

.how-inner {
  max-width: 640px;
}

.steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.steps li {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.steps h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.steps p {
  font-size: 0.9rem;
  color: var(--text-sub);
}

/* ── CTA ── */
.cta {
  background: var(--blue);
  padding: 80px 0;
  text-align: center;
  color: #fff;
}

.cta h2, .cta p {
  color: #fff;
}

.cta h2 { margin-bottom: 12px; }

.cta p {
  font-size: 1.05rem;
  opacity: 0.85;
  margin-bottom: 32px;
}

/* ── Footer ── */
footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-sub);
}

footer a {
  color: var(--text-sub);
  text-decoration: none;
}

footer a:hover { color: var(--blue); }

/* ── Responsive ── */
@media (max-width: 760px) {
  .hero { padding: 48px 0 40px; }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-image { order: -1; }

  .app-screenshot { width: 220px; }

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}