/* =========
   Variables globales
   ========= */
   :root {
    --bg: #050816;
    --bg-alt: #0b1020;
    --card-bg: #111827;
    --accent: #6366f1;
    --accent-soft: rgba(99, 102, 241, 0.15);
    --text: #f9fafb;
    --text-muted: #9ca3af;
    --border: #1f2937;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.45);
  }
  
  /* =========
     Reset simple
     ========= */
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: radial-gradient(circle at top left, #111827, #020617 40%, #000 100%);
    color: var(--text);
    line-height: 1.6;
  }
  
  /* =========
     Structure
     ========= */
  .container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 1.5rem;
  }
  
  /* =========
     Navbar
     ========= */
  .navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    background: linear-gradient(to bottom, rgba(2, 6, 23, 0.92), rgba(2, 6, 23, 0.8), transparent);
    border-bottom: 1px solid rgba(55, 65, 81, 0.4);
  }
  
  .nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
  }
  
  .logo {
    font-weight: 700;
    letter-spacing: 0.06em;
    font-size: 1.1rem;
    text-transform: uppercase;
  }
  
  .logo span {
    color: var(--accent);
  }
  
  .nav-links {
    display: flex;
    gap: 1.5rem;
    font-size: 0.95rem;
  }
  
  .nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    transition: color 0.2s ease, opacity 0.2s ease;
  }
  
  .nav-links a:hover {
    color: var(--text);
    opacity: 0.9;
  }
  
  .nav-cta {
    font-size: 0.9rem;
  }
  
  /* =========
     Boutons
     ========= */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 0.7rem 1.4rem;
    font-size: 0.95rem;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    white-space: nowrap;
  }
  
  .btn-primary {
    background: linear-gradient(135deg, #4f46e5, #6366f1);
    color: white;
    box-shadow: 0 12px 30px rgba(79, 70, 229, 0.4);
  }
  
  .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 40px rgba(79, 70, 229, 0.55);
  }
  
  .btn-secondary {
    border-color: rgba(148, 163, 184, 0.5);
    color: var(--text-muted);
    background: rgba(15, 23, 42, 0.8);
  }
  
  .btn-secondary:hover {
    border-color: rgba(148, 163, 184, 0.9);
    color: var(--text);
  }
  
  .btn-full {
    width: 100%;
    justify-content: center;
  }
  
  /* =========
     Sections globales
     ========= */
  .section {
    padding: 4.5rem 0;
  }
  
  .section-alt {
    background: radial-gradient(circle at top right, rgba(15, 23, 42, 0.9), rgba(2, 6, 23, 0.98));
  }
  
  .section-title {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    text-align: center;
  }
  
  .section-subtitle {
    text-align: center;
    max-width: 620px;
    margin: 0 auto 2.5rem;
    color: var(--text-muted);
    font-size: 0.98rem;
  }
  
  /* =========
     Hero
     ========= */
  .hero {
    padding: 4.5rem 0 4rem;
  }
  
  .hero-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 2.5rem;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 1rem;
  }
  
  .hero-subtitle {
    color: var(--text-muted);
    max-width: 520px;
    font-size: 0.98rem;
    margin-bottom: 1.5rem;
  }
  
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 0.75rem;
  }
  
  .hero-note {
    font-size: 0.85rem;
    color: var(--text-muted);
  }
  
  /* Hero Card */
  .hero-card {
    background: radial-gradient(circle at top left, rgba(79, 70, 229, 0.12), var(--card-bg));
    border-radius: var(--radius-xl);
    padding: 1.6rem 1.5rem;
    border: 1px solid rgba(75, 85, 99, 0.7);
    box-shadow: var(--shadow-soft);
  }
  
  .hero-card h2 {
    font-size: 1.1rem;
    margin-bottom: 0.9rem;
  }
  
  .hero-card ul {
    list-style: none;
    margin-bottom: 0.9rem;
  }
  
  .hero-card li {
    font-size: 0.92rem;
    margin-bottom: 0.4rem;
  }
  
  .hero-card-foot {
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px dashed rgba(75, 85, 99, 0.8);
    padding-top: 0.6rem;
  }
  
  /* =========
     Grids & Cards
     ========= */
  .grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.4rem;
    margin-top: 2rem;
  }
  
  .grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
    margin-top: 1.8rem;
  }
  
  .card {
    background: radial-gradient(circle at top left, rgba(99, 102, 241, 0.08), rgba(15, 23, 42, 0.95));
    border-radius: var(--radius-lg);
    padding: 1.4rem 1.3rem;
    border: 1px solid rgba(55, 65, 81, 0.9);
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.7);
  }
  
  .card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
  }
  
  .card p {
    font-size: 0.95rem;
    color: #d1d5db;
  }
  
  /* =========
     Steps (process)
     ========= */
  .steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    margin-top: 2.2rem;
  }
  
  .step {
    position: relative;
    padding: 1.5rem 1.3rem 1.2rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, rgba(15, 23, 42, 1), rgba(15, 23, 42, 0.9));
    border: 1px solid rgba(55, 65, 81, 0.9);
  }
  
  .step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 999px;
    background: var(--accent-soft);
    border: 1px solid rgba(129, 140, 248, 0.9);
    color: #c7d2fe;
    font-size: 0.9rem;
    margin-bottom: 0.6rem;
  }
  
  .step h3 {
    font-size: 1rem;
    margin-bottom: 0.4rem;
  }
  
  .step p {
    font-size: 0.92rem;
    color: var(--text-muted);
  }
  
  /* =========
     Lists
     ========= */
  .list {
    list-style: none;
    padding-left: 0.2rem;
  }
  
  .list li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 0.35rem;
    font-size: 0.94rem;
    color: #e5e7eb;
  }
  
  .list li::before {
    content: "•";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent);
  }
  
  /* =========
     Contact Form
     ========= */
  .contact-form {
    margin: 2rem auto 0;
    max-width: 680px;
    background: radial-gradient(circle at top left, rgba(99, 102, 241, 0.16), rgba(17, 24, 39, 0.98));
    border-radius: 24px;
    padding: 1.8rem 1.6rem;
    border: 1px solid rgba(55, 65, 81, 0.9);
    box-shadow: var(--shadow-soft);
  }
  
  .form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
  
  .form-group {
    margin-bottom: 1rem;
  }
  
  .form-group label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 0.3rem;
    color: #e5e7eb;
  }
  
  input,
  textarea {
    width: 100%;
    border-radius: 0.85rem;
    border: 1px solid rgba(75, 85, 99, 0.9);
    background: rgba(15, 23, 42, 0.95);
    padding: 0.65rem 0.8rem;
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  }
  
  input::placeholder,
  textarea::placeholder {
    color: rgba(148, 163, 184, 0.9);
  }
  
  input:focus,
  textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px rgba(129, 140, 248, 0.5);
  }
  
  textarea {
    resize: vertical;
    min-height: 110px;
  }
  
  .form-note {
    font-size: 0.8rem;
    margin-top: 0.7rem;
    color: var(--text-muted);
  }
  
  /* =========
     Footer
     ========= */
  .footer {
    border-top: 1px solid rgba(31, 41, 55, 0.9);
    padding: 1.3rem 0 1.6rem;
    background: rgba(2, 6, 23, 0.98);
  }
  
  .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.85rem;
    color: var(--text-muted);
  }
  
  .footer-small {
    opacity: 0.85;
  }
  
  /* =========
     Responsive
     ========= */
  @media (max-width: 900px) {
    .hero-content {
      grid-template-columns: 1fr;
    }
  
    .hero-card {
      order: -1;
    }
  
    .grid-3 {
      grid-template-columns: 1fr;
    }
  
    .steps {
      grid-template-columns: 1fr;
    }
  
    .grid-2 {
      grid-template-columns: 1fr;
    }
  
    .form-row {
      grid-template-columns: 1fr;
    }
  
    .nav-links {
      display: none; /* Pour simplifier : pas de menu burger pour l’instant */
    }
  
    .nav-cta {
      display: none;
    }
  
    .hero {
      padding-top: 3.5rem;
    }
  }
  
  @media (max-width: 600px) {
    .hero-text h1 {
      font-size: 1.9rem;
    }
  
    .contact-form {
      padding: 1.4rem 1.2rem;
    }
  
    .footer-content {
      flex-direction: column;
      align-items: flex-start;
    }
  }