html, body {
  height: 100%;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  background: linear-gradient(120deg, #f8fafc 80%, #eaf1fc 100%);
  color: #222;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main {
  flex: 1;
  /* optional: for demo, padding or margin */
}
.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 20px;
}
header {
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  padding: 0;
}
.header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.logo {
  height: 60px;
}
nav a {
  margin-left: 28px;
  text-decoration: none;
  color: #2940d3;
  font-weight: 500;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: border 0.2s;
}
nav a.active, nav a:hover {
  border-bottom: 2px solid #2940d3;
}
.hero {
  text-align: center;
  margin: 70px 0 40px;
  position: relative;
}
.hero h1 {
  font-size: 2.6em;
  margin-bottom: 12px;
  color: #23272f;
  font-weight: 700;
  letter-spacing: -1px;
}
.subtitle {
  color: #5d636f;
  font-size: 1.20em;
  margin-bottom: 30px;
  line-height: 1.5;
}
.cta-badge {
  display: inline-block;
  margin-bottom: 38px;
  margin-top: 2px;
  transition: transform 0.14s;
}
.cta-badge:hover {
  transform: scale(1.04);
}
.app-store-badge {
  height: 44px;
  width: auto;
  box-shadow: 0 2px 10px rgba(0,0,0,0.10);
  border-radius: 10px;
  border: 1px solid #eaeaea;
}
.screenshot-wrap {
  display: flex;
  justify-content: center;
  gap: 34px;
  margin-top: 30px;
  margin-bottom: 16px;
}
.app-screenshot {
  max-width: 400px;
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(41,64,211,0.11);
  border: 1.5px solid #e6eaf3;
  background: #fff;
  transition: box-shadow 0.2s;
}
.app-screenshot:hover {
  box-shadow: 0 12px 48px rgba(41,64,211,0.15);
}
footer {
  background: #f5f5f8;
  color: #888;
  font-size: 0.98em;
  padding: 24px 0 22px;
  margin-top: 36px;
  border-top: 1px solid #e8e8e8;
  text-align: center;
}
footer a {
  color: #4a64ec;
  text-decoration: underline;
}
/* Responsive tweaks */
@media (max-width: 950px) {
  .screenshot-wrap { flex-direction: column; align-items: center; gap: 18px;}
  .app-screenshot { max-width: 98%; }
  .hero h1 { font-size: 1.38em; }
}
@media (max-width: 600px) {
  .header-flex { flex-direction: column; height: auto; }
  .logo { height: 42px; margin-top: 10px; }
  .screenshot-wrap { gap: 10px; }
  .hero h1 { font-size: 1.14em; }
}

.features-list {
  list-style: none;
  padding: 0;
  margin: 0 auto 34px auto;
  max-width: 650px;
  text-align: left;
  font-size: 1.14em;
}

.features-list li {
  margin: 0 0 14px 0;
  padding-left: 0;
  position: relative;
  line-height: 1.0;
}

@media (max-width: 650px) {
  .features-list {
    font-size: 1em;
    max-width: 98vw;
  }
  .features-screenshot {
    max-width: 98vw;
  }
}

.privacy-section {
  max-width: 680px;
  margin: 50px auto 60px auto;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 22px rgba(41,64,211,0.05);
  padding: 8px 32px 32px 32px;
  text-align: left;
}

.privacy-section h2 {
  font-size: 2em;
  font-weight: 700;
  margin-bottom: 4px;
  text-align: left;
}

.privacy-date {
  color: #666;
  margin-bottom: 24px;
}

.privacy-section h3 {
  font-size: 1.17em;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 10px;
  color: #2940d3;
}

.privacy-section p {
  margin: 0 0 18px 0;
  color: #222;
  font-size: 1.05em;
  line-height: 1.7;
}

.privacy-thanks {
  margin-top: 40px;
  font-style: italic;
  color: #888;
  text-align: center;
}

@media (max-width: 700px) {
  .privacy-section {
    padding: 20px 6vw;
    font-size: 1em;
  }
}