/* styles.css */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --text-color: #333;
    --bg-color: #ecf0f1;
    --card-bg: #fff;
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html, body {
    height: 100%;
  }
  
  body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
  }

  .page-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  }
  
  .container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  header {
    background-color: var(--primary-color);
    color: var(--bg-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
  }
  
  nav ul {
    display: flex;
    justify-content: space-around;
    list-style-type: none;
  }
  
  nav ul li a {
    color: var(--bg-color);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
  }
  
  nav ul li a:hover {
    color: var(--secondary-color);
  }
  
  main {
    flex: 1 0 auto;
    margin-top: 80px;
    padding: 2rem 0;
    padding-bottom: 60px;
  }
  
  h1, h2, h3 {
    margin-bottom: 1rem;
  }
  
  .btn {
    display: inline-block;
    background-color: var(--secondary-color);
    color: var(--bg-color);
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
  }
  
  .btn:hover {
    background-color: var(--primary-color);
  }
  
  /* Page d'accueil */
  .hero {
    text-align: center;
    padding: 3rem 0;
  }
  
  .hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
  }
  
  .hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
  }
  
  .skills {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
  }
  
  .skill-tag {
    background-color: var(--primary-color);
    color: var(--bg-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
  }
  
  /* Page Projets */
  .project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
  }
  
  .project-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
  }
  
  .project-card:hover {
    transform: translateY(-5px);
  }
  
  .project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }
  
  .project-info {
    padding: 1rem;
  }
  
  /* Page Contact */
  .contact-form {
    max-width: 500px;
    margin: 0 auto;
  }

  .form-group input:invalid,
.form-group textarea:invalid {
    border-color: #ff4136;
    box-shadow: 0 0 5px rgba(255, 65, 54, 0.5);
}

.form-group input:focus:invalid,
.form-group textarea:focus:invalid {
    outline: none;
    border-color: #ff4136;
}
  
  .form-group {
    margin-bottom: 1rem;
  }
  
  .form-group label {
    display: block;
    margin-bottom: 0.5rem;
  }
  
  .form-group input,
  .form-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
  }
  
  .form-group textarea {
    height: 150px;
  }
  
  /* Footer */
  footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    background-color: var(--primary-color);
    color: var(--bg-color);
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
    flex-shrink: 0;
  }
  
  /* Responsive Design */
  @media (max-width: 768px) {
    .hero h1 {
      font-size: 2rem;
    }
  
    .hero p {
      font-size: 1rem;
    }
  
    .project-grid {
      grid-template-columns: 1fr;
    }
  }