/* ================= General Styles ================= */
body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  color: #111;
  background: #f9f9f9;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* ================= Header ================= */
header {
  padding: 1rem 0;
  background: #fff;
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
}

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

.nav-links a {
  margin-left: 2rem;
  text-decoration: none;
  color: #111;
  font-weight: 500;
}

/* ================= Hero ================= */
.hero {
  text-align: center;
  padding: 6rem 2rem;
  background: linear-gradient(to right, #e6f0ff, #ffffff);
}

.hero h1 {
  font-size: 2.8rem;
  line-height: 1.2;
}

.hero h1 span {
  color: #0070f3;
}

/* ================= Buttons ================= */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  margin-top: 1rem;
  font-weight: 600;
}

.btn-primary {
  background: #0070f3;
  color: #fff;
}

/* ================= Sections ================= */
.section {
  padding: 4rem 2rem;
}

.section--alt {
  background: #f0f4f8;
}

/* ================= Fade-in ================= */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ================= Horizontal Apple-style Scroll ================= */
.scroll-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(280px, 1fr);
  gap: 2rem;
  overflow-x: auto;
  padding-bottom: 1rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.scroll-row::-webkit-scrollbar {
  display: none;
}

.feature-card {
  scroll-snap-align: start;
  background: #ffffff;
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.feature-card h4 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 1rem;
  color: #555;
  line-height: 1.6;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.12);
}

/* ================= Social Links (Text-based) ================= */
.social-links.subtle {
  display: flex;
  gap: 28px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.social-links.subtle a {
  font-size: 14px;
  font-weight: 500;
  color: #6b6b6b;
  text-decoration: none;
  transition: color 0.25s ease, transform 0.25s ease;
}

.social-links.subtle a:hover {
  color: #2b2b2b;
  transform: translateY(-1px);
}

/* ================= Responsive ================= */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .social-links.subtle {
    gap: 20px;
  }
}

/* ================= Apple-style Dark Mode ================= */
@media (prefers-color-scheme: dark) {
  body {
    background: #0b0b0d;
    color: #f5f5f7;
  }

  header {
    background: rgba(11, 11, 13, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
  }

  .nav-links a {
    color: #c7c7cc;
  }

  .nav-links a:hover {
    color: #ffffff;
  }

  .hero {
    background: radial-gradient(circle at top, #1c1c1e 0%, #0b0b0d 60%);
  }

  .section {
    background: #0b0b0d;
  }

  .section--alt {
    background: #111113;
  }

  h1, h2, h3, h4 {
    color: #f5f5f7;
  }

  p {
    color: #c7c7cc;
  }

  .btn-primary {
    background: #ffffff;
    color: #0b0b0d;
  }

  .btn-primary:hover {
    background: #e5e5e7;
  }

  .feature-card {
    background: #1c1c1e;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
  }

  .feature-card:hover {
    box-shadow: 0 30px 70px rgba(0,0,0,0.8);
  }

  footer {
    background: #0b0b0d;
    border-top: 1px solid rgba(255,255,255,0.06);
  }

  .footer-content p {
    color: #8e8e93;
  }

  .social-links.subtle a {
    color: #8e8e93;
  }

  .social-links.subtle a:hover {
    color: #f5f5f7;
  }
}