/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #5b4cdb;
  --primary-dark: #4339b5;
  --secondary-color: #00d9a5;
  --accent-color: #ff6b6b;
  --text-dark: #1a202c;
  --text-light: #64748b;
  --background: #f7fafc;
  --white: #ffffff;
  --border-color: #e2e8f0;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
  --gradient-primary: linear-gradient(135deg, #5b4cdb 0%, #7c3aed 100%);
  --gradient-hero: linear-gradient(135deg, #f7fafc 0%, #eef2ff 100%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--background);
}

/* Hero Section */
.hero {
  padding: 4rem 2rem;
  background: var(--gradient-hero);
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.hero .subtitle {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.hero .catchphrase {
  font-size: 1.25rem;
  color: var(--text-light);
  margin: 0 auto 2rem auto;
  max-width: 800px;
}

.hero-buttons {
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  padding: 0;
  border-radius: 0;
  text-decoration: none;
  font-weight: 600;
  transition: none;
  cursor: pointer;
  border: none;
  background: none;
}

.btn-primary {
  background: transparent;
  color: var(--white);
  border: none;
  outline: none;
  box-shadow: none;
  transition: transform 0.2s ease;
}

.btn-primary:hover {
  background: transparent;
  transform: scale(1.05);
  box-shadow: none;
}

.app-store-badge {
  height: 80px;
  vertical-align: middle;
  border: none;
  outline: none;
}

.btn-primary img {
  border: none;
  outline: none;
  box-shadow: none;
}

.hero-image {
  max-width: 400px;
  margin: 0 auto;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: var(--shadow-hover);
}

/* Intro Section */
.intro {
  padding: 4rem 2rem;
  background: var(--white);
  text-align: center;
}

.intro h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-dark);
}

.intro p {
  font-size: 1.25rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Features Section */
.features {
  padding: 5rem 2rem;
  background: var(--background);
}

.features h2 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-dark);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 16px;
  text-align: center;
  transition:
    transform 0.3s,
    box-shadow 0.3s;
  border: 1px solid var(--border-color);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.feature-image {
  width: 100%;
  max-width: 200px;
  height: auto;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.feature-card p {
  color: var(--text-light);
}

/* Recommendations Section */
.recommendations {
  padding: 4rem 2rem;
  background: var(--white);
  text-align: center;
}

.recommendations h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--text-dark);
}

.recommendations ul {
  list-style: none;
  max-width: 600px;
  margin: 0 auto;
}

.recommendations li {
  padding: 1rem 0;
  font-size: 1.25rem;
  color: var(--text-light);
  border-bottom: 1px solid var(--border-color);
}

.recommendations li:before {
  content: "✓ ";
  color: var(--secondary-color);
  font-weight: bold;
  margin-right: 0.5rem;
}

.recommendations li:last-child {
  border-bottom: none;
}

/* How to Use Section */
.how-to-use {
  padding: 5rem 2rem;
  background: var(--background);
}

.how-to-use h2 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-dark);
}

.how-to-use-content {
  display: flex;
  align-items: center;
  gap: 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.how-to-use-text {
  flex: 1;
}

.how-to-use ul {
  list-style: none;
  margin-bottom: 2rem;
}

.how-to-use li {
  padding: 1rem 0;
  font-size: 1.25rem;
  color: var(--text-light);
}

.how-to-use li:before {
  content: "👉 ";
  margin-right: 0.5rem;
}

.conclusion {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  text-align: center;
}

.how-to-use-image {
  flex: 1;
  text-align: center;
}

.how-to-use-image img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 20px;
  box-shadow: var(--shadow-hover);
}

/* CTA Section */
.cta {
  padding: 5rem 2rem;
  background: var(--gradient-primary);
  text-align: center;
  color: var(--white);
}

.cta h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--white);
}

.cta p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
.footer {
  background: var(--text-dark);
  color: var(--white);
  padding: 3rem 2rem;
  text-align: center;
}

.footer-bottom p {
  margin-bottom: 1rem;
  opacity: 0.8;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1.25rem;
  }

  .hero .catchphrase {
    font-size: 1.1rem;
  }

  .intro h2,
  .features h2,
  .recommendations h2,
  .how-to-use h2,
  .cta h2 {
    font-size: 2rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .how-to-use-content {
    flex-direction: column;
    gap: 2rem;
  }

  .how-to-use-text {
    text-align: center;
  }

  .recommendations li,
  .how-to-use li {
    font-size: 1.1rem;
  }
}