:root {
  --color-darkest: #1c3d2e;
  --color-dark: #2e6b4a;
  --color-mid: #3d9e6b;
  --color-light: #e4f0ea;
  --color-surface: #f4f8f5;
  --color-mint: #9FE1CB;
  --color-white: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background-color: var(--color-surface);
  color: var(--color-text);
  line-height: 1.6;
}

/* ── Nav ── */
nav {
  background: var(--color-darkest);
  padding: 0 2.5rem;
  display: flex;
  align-items: center;
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  color: var(--color-white);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ── Footer ── */
footer {
  background: var(--color-darkest);
  color: var(--color-light);
  text-align: center;
  padding: 2rem;
  font-size: 0.875rem;
  margin-top: 5rem;
}

/* ── Coming soon badge ── */
.coming-soon-badge {
  display: inline-block;
  background: var(--color-mint);
  color: var(--color-darkest);
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
}

.coming-soon-badge-dark {
  background: var(--color-darkest);
  color: var(--color-white);
}

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--color-darkest) 0%, var(--color-dark) 100%);
  color: var(--color-white);
  text-align: center;
  padding: 7rem 2rem 6rem;
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-light);
  max-width: 580px;
  margin: 0 auto;
}

/* ── Section ── */
.section {
  padding: 5rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800;
  color: var(--color-darkest);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.section-subtitle {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 580px;
}

/* ── Cards ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-light);
  border-radius: 14px;
  padding: 2rem;
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: 0 4px 20px rgba(28, 61, 46, 0.08);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  line-height: 1;
}

.card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--color-darkest);
}

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

/* ── App Store Banner ── */
.appstore-banner {
  background: var(--color-light);
  padding: 4rem 2rem;
  text-align: center;
}

.appstore-banner h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-darkest);
  margin-bottom: 0.75rem;
}

.appstore-banner p {
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
  font-size: 1rem;
}

/* ── Responsive ── */
@media (max-width: 640px) {
  nav {
    padding: 0 1.25rem;
  }

  .hero {
    padding: 5rem 1.25rem 4rem;
  }

  .section {
    padding: 3.5rem 1.25rem;
  }
}