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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #2d2d2d;
  background: linear-gradient(135deg, #e8f4f8 0%, #f0e6f6 50%, #fef3e2 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

/* Visually hidden but accessible to screen readers and search engines */
.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;
}

header {
  background: #fff;
  color: #333;
  text-align: center;
  padding: 1rem 1rem 0.5rem;
}

header .hero {
  max-width: 800px;
  margin: 0 auto;
}

header .hero-img {
  width: 100%;
  max-width: 800px;
  height: auto;
  display: block;
  margin: 0 auto;
}

header .tagline {
  font-size: 1.1rem;
  font-weight: 500;
  background: linear-gradient(90deg, #2980b9, #8e44ad, #e74c3c);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding: 0.25rem 0 0.75rem;
  min-height: 1.8em;
  border-right: 2px solid #8e44ad;
  display: inline-block;
  animation: blink-cursor 0.7s step-end infinite;
}

header .tagline.typed {
  border-right: none;
  animation: none;
}

@keyframes blink-cursor {
  50% { border-color: transparent; }
}

header nav {
  padding: 0.5rem 0;
}

header nav a {
  color: #2980b9;
  text-decoration: none;
  font-weight: 500;
}

header nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 720px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  background: rgba(255, 255, 255, 0.92);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  border-left: 4px solid transparent;
  transition: box-shadow 0.2s, transform 0.2s;
}

section:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
}

/* Scroll reveal animation */
section.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

section.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.intro {
  border-left-color: #3498db;
}

.download {
  border-left-color: #27ae60;
}

.features {
  border-left-color: #9b59b6;
}

.community {
  border-left-color: #e67e22;
}

.support {
  border-left-color: #e74c3c;
}

h2 {
  margin-bottom: 0.75rem;
  font-size: 1.3rem;
}

.intro h2, section:nth-child(1) h2 { color: #2471a3; }
.download h2 { color: #1e8449; }
.features h2 { color: #7d3c98; }
.community h2 { color: #ca6f1e; }
.support h2 { color: #c0392b; }

p {
  margin-bottom: 0.75rem;
}

p:last-child {
  margin-bottom: 0;
}

ul {
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

li {
  margin-bottom: 0.35rem;
}

.features li::marker {
  color: #9b59b6;
}

a {
  color: #8e44ad;
  transition: color 0.2s;
}

a:hover {
  color: #e74c3c;
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, #27ae60, #2ecc71);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 6px rgba(39, 174, 96, 0.3);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(39, 174, 96, 0.4);
  color: #fff;
}

.btn:not(.btn-secondary) {
  animation: glow-pulse 2s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% {
    box-shadow: 0 2px 6px rgba(39, 174, 96, 0.3);
  }
  50% {
    box-shadow: 0 4px 20px rgba(39, 174, 96, 0.6), 0 0 30px rgba(46, 204, 113, 0.2);
  }
}

.btn:not(.btn-secondary):hover {
  animation: none;
  box-shadow: 0 4px 12px rgba(39, 174, 96, 0.4);
}

.btn-secondary {
  background: linear-gradient(135deg, #8e44ad, #a569bd);
  box-shadow: 0 2px 6px rgba(142, 68, 173, 0.3);
}

.btn-secondary:hover {
  box-shadow: 0 4px 12px rgba(142, 68, 173, 0.4);
}

footer {
  text-align: center;
  padding: 1.5rem 1rem;
  color: #666;
  font-size: 0.9rem;
  border-top: 2px solid;
  border-image: linear-gradient(90deg, #3498db, #9b59b6, #e74c3c, #e67e22) 1;
  max-width: 720px;
  margin: 0 auto;
}

footer nav {
  margin-bottom: 0.5rem;
}

footer a {
  color: #8e44ad;
  text-decoration: none;
}

footer a:hover {
  color: #e74c3c;
  text-decoration: underline;
}

/* Privacy page adjustments */
main h1 {
  color: #2471a3;
  margin-bottom: 1rem;
  font-size: 1.8rem;
}

main h2 {
  margin-top: 1.5rem;
  color: #7d3c98;
}

main h3 {
  color: #ca6f1e;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

/* Prevent horizontal overflow on any device */
img, video, iframe, embed, object {
  max-width: 100%;
  height: auto;
}

/* Touch-friendly links and list items */
@media (pointer: coarse) {
  a {
    padding: 0.15rem 0;
  }

  li {
    margin-bottom: 0.5rem;
  }
}

/* Tablet */
@media (max-width: 768px) {
  header {
    padding: 0.75rem 1rem 0.5rem;
  }

  main {
    margin: 1.5rem auto;
  }
}

/* Phone */
@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  header {
    padding: 0.5rem 0.75rem 0.25rem;
  }

  header .tagline {
    font-size: 0.9rem;
  }

  main {
    margin: 1rem auto;
    padding: 0 0.75rem;
  }

  section {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
  }

  h2 {
    font-size: 1.15rem;
  }

  main h1 {
    font-size: 1.4rem;
  }

  .download-buttons {
    flex-direction: column;
  }

  .btn {
    text-align: center;
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
    /* Minimum 44px touch target per Apple/Google guidelines */
    min-height: 44px;
  }

  ul {
    padding-left: 1.25rem;
  }

  footer {
    padding: 1rem 0.75rem;
    font-size: 0.85rem;
  }

  /* Privacy page: tighten spacing on phone */
  main h2 {
    margin-top: 1.25rem;
    font-size: 1.1rem;
  }

  main h3 {
    font-size: 1rem;
  }
}