:root {
  --primary-color: #4285f4;
  --secondary-color: #f8f9fa;
  --accent-color: #34a853;
  --text-color: #202124;
  --light-text: #5f6368;
  --border-color: #dadce0;
  --shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: #fff;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.section {
  padding: 60px 0;
  border-bottom: 1px solid var(--border-color);
  width: 100%;
  display: flex;
  justify-content: center;
}

.section:last-child {
  border-bottom: none;
}

.section h2 {
  text-align: center;
  width: 100%;
}

.section p {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Classes utilitaires pour l'alignement */
.text-left {
  text-align: left;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: #3367d6;
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: 12px 24px;
  border-radius: 4px;
  font-weight: 500;
  transition: background-color 0.3s, transform 0.2s;
  text-align: center;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background-color: #3367d6;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: white;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: #f1f3f4;
  color: #3367d6;
}

.btn-outline {
  background-color: transparent;
  color: white;
  border: 1px solid white;
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.flex {
  display: flex;
}

.flex-wrap {
  flex-wrap: wrap;
}

.justify-between {
  justify-content: space-between;
}

.grid {
  display: grid;
  grid-gap: 20px;
}

.presentation-grid {
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.download-container {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.download-button {
  margin: 30px 0;
}

img {
  max-width: 100%;
  height: auto;
}

/* Media Queries */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .section {
    padding: 40px 0;
  }

  .grid {
    grid-template-columns: 1fr !important; /* Forcer une seule colonne sur mobile */
    gap: 20px;
  }
  
  .container {
    padding: 0 15px;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 0.95rem;
  }
}

@media (max-width: 576px) {
  h1 {
    font-size: 1.75rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .section {
    padding: 30px 0;
  }
  
  p {
    font-size: 0.95rem;
  }
  
  .container {
    padding: 0 10px;
  }
  
  .download-container small {
    font-size: 0.8rem;
    display: block;
    padding: 0 15px;
    line-height: 1.4;
  }
}