/* ========== Reset & Base ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  body {
    font-family: 'Roboto', sans-serif;
    background: #fff;
    color: #333;
    line-height: 1.6;
  }
  
  /* ========== Variables ========== */
  :root {
    --primary-blue: #0056b3;
    --accent-red: #e31b23;
    --neutral-dark: #333;
    --neutral-light: #fff;
    --border-light: #eaeaea;
  }
  
  /* ========== Header ========== */
  .header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--neutral-light);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
  }
  .header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
  }
  .logo img {
    height: 50px;
  }
  .nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
  }
  .nav a {
    text-decoration: none;
    color: var(--neutral-dark);
    font-weight: 500;
    transition: color 0.3s;
  }
  .nav a:hover {
    color: var(--primary-blue);
  }
  .don-btn {
    text-decoration: none;
    background: var(--accent-red);
    color: var(--neutral-light);
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: 600;
    transition: background 0.3s;
  }
  .don-btn:hover {
    background: #c4221d;
  }
  
  /* ========== SECTION CONTACT avec fond animé ========== */
  .section.contact {
    position: relative;
    padding: 80px 0 0px; /* compense header fixe */
    overflow: hidden;
  }
  
  .section.contact::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(120deg, #0056b3, #e31b23, #0056b3);
    background-size: 400% 400%;
    animation: bg-animate 20s ease infinite;
    opacity: 0.1;
    z-index: 0;
  }
  
  .section.contact .container {
    position: relative;
    z-index: 1;
    text-align: center;
    background: rgba(255,255,255,0.9);
    padding: 40px 20px;
    border-radius: 8px;
  }
  
  .section.contact h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--neutral-dark);
  }
  .section.contact p {
    font-size: 18px;
    color: #555;
    max-width: 700px;
    margin: 0 auto 40px;
  }
  
  /* ========== FORMULAIRE ========== */
  .contact-form {
    max-width: 600px;
    margin: 0 auto 40px;
    background: #fff;
    padding: 30px;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    text-align: left;
  }
  .form-group {
    margin-bottom: 20px;
  }
  .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--neutral-dark);
  }
  .form-group input,
  .form-group select,
  .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
  }
  .form-group input:focus,
  .form-group select:focus,
  .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
  }
  .contact-form .btn {
    display: inline-block;
    background: var(--primary-blue);
    color: var(--neutral-light);
    padding: 12px 30px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
  }
  .contact-form .btn:hover {
    background: #004494;
  }
  
  /* ========== BLOC ALTERNATIF ========== */
  .contact-alt {
    text-align: center;
    margin-top: 20px;
    position: relative;
    z-index: 1;
  }
  .contact-alt p {
    margin-bottom: 10px;
    color: #555;
  }
  .footer-socials {
    display: flex;
    justify-content: center;
    gap: 12px;
  }
  .social-icon {
    display: block;
    width: 32px;
    height: 32px;
    background-size: contain;
    background-repeat: no-repeat;
    transition: opacity 0.2s;
  }
  .social-icon:hover {
    opacity: 0.7;
  }
  .social-icon.facebook {
    background-image: url('../img/facebook-icon.svg');
  }
  .social-icon.instagram {
    background-image: url('../img/instagram-icon.svg');
  }
  .social-icon.linkedin {
    background-image: url('../img/linkedin-icon.svg');
  }
  
  /* ========== FOOTER ========== */
  .footer-main {
    background: #111;
    color: #ccc;
    font-size: 0.9rem;
    padding: 40px 0 20px;
  }
  .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
  }
  .footer-columns {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: space-between;
  }
  .footer-col {
    flex: 1 1 200px;
  }
  .footer-col h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.1rem;
    color: #fff;
    margin-bottom: 12px;
  }
  .footer-col ul {
    list-style: none;
  }
  .footer-col li + li {
    margin-top: 8px;
  }
  .footer-col a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.2s;
  }
  .footer-col a:hover {
    color: var(--accent-red);
    text-decoration: underline;
  }
  .footer-socials {
    margin-top: 16px;
    display: flex;
    gap: 12px;
  }
  .footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
    color: #555;
  }
  
  /* ========== Responsive ========== */
  @media (max-width: 768px) {
    .section.contact {
      padding: 120px 20px 60px;
    }
    .section.contact .container {
      padding: 20px;
    }
    .contact-form {
      margin: 0 20px 40px;
    }
    .footer-columns {
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    .footer-socials {
      justify-content: center;
    }
  }