:root {
  --pink: #FF9EFF;
  --blue: #3EC7FF;
  --text: #0f172a;
  --muted: #64748b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui;
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.content-page {
  max-width: 820px;
  margin: 0 auto;
  padding: 3rem 1.25rem;
}

.content-page h1 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.content-page h2 {
  margin-top: 2.5rem;
  font-size: 1.5rem;
}

.content-page h3 {
  margin-top: 1.5rem;
  font-size: 1.15rem;
}

.content-page ul {
  margin-left: 1.25rem;
  line-height: 1.6;
}

.content-page p {
  line-height: 1.65;
  margin: 0.75rem 0;
}

.top-nav a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  position: relative;
}


.top-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #FF9EFF, #3EC7FF);
  border-radius: 2px;
}

.content-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.content-page h1 {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
}

.content-page p {
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #eef2f7;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}

.nav-links a {
  margin-left: 1.5rem;
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 3rem 6rem;
  align-items: center;
  gap: 3rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 480px;
}

.appstore-button {
  display: inline-block;
  margin-top: 2rem;
  padding: 0.9rem 1.4rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pink), var(--blue));
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.hero-image img {
  width: 100%;
  max-width: 420px;
}

.features {
  padding: 4rem 6rem;
}

.features h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature p {
  color: var(--muted);
}

.cta {
  padding: 4rem 6rem;
  text-align: center;
}

footer {
  padding: 2rem;
  text-align: center;
  color: var(--muted);
}

footer a {
  color: inherit;
  text-decoration: none;
}

/* =========================
   Mobile Optimisation
   ========================= */

@media (max-width: 768px) {

  .top-nav {
    width: 100%;
  }

  .nav-inner {
    align-items: center;
    gap: 0.75rem;
  }

  .nav-links {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.25rem;
  }

    .nav-links a {
    font-size: 0.95rem;
    padding: 0.25rem 0;
  }

    .nav-logo {
    font-size: 1.2rem;
  }
}

@media (max-width: 768px) {

  .content-page {
    padding: 2rem 1rem;
  }

  .content-page h1 {
    font-size: 1.8rem;
  }

  .content-page h2 {
    font-size: 1.35rem;
  }

  .content-page h3 {
    font-size: 1.1rem;
  }

  .content-page p,
  .content-page li {
    font-size: 0.95rem;
  }
}

@media (max-width: 768px) {

  .hero {
    flex-direction: column;
    text-align: center;
    padding: 3rem 1rem;
  }

  .hero-text {
    order: 1;
    max-width: 100%;
  }

  .hero-image {
    order: 2;
    margin-top: 2rem;
  }

  .hero-image img {
    width: 100%;
    max-width: 320px;
    height: auto;
  }
}

@media (max-width: 768px) {

  .cta-button {
    padding: 0.85rem 1.25rem;
    font-size: 1rem;
  }
    .content-page {
    max-width: 100%;
    padding: 2rem 1rem;
    align-items: flex-start;
  }

  .content-page > * {
    width: 100%;
  }

    .features,
  .grid,
  .columns,
  .two-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {

  /* Global column enforcement */
  section,
  header,
  footer,
  main,
  .container,
  .hero,
  .nav-inner,
  .content-page {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

}