:root {
    /* Palette de marque Proximity */
    --bg: #f6f8fc;
    --surface: #ffffff;
    --ink: #101b33;
    --ink-soft: #4a5670;
    --line: #e2e7f0;
  
    --primary: #2568d8;
    --primary-dark: #123b7a;
    --primary-bg: #e7f0fd;
  
    --brand-gradient: linear-gradient(90deg, #2568d8 0%, #8b5cf6 55%, #e2593f 100%);
  
    /* Catégories */
    --health: #1fa463;
    --health-bg: #e5f5ec;
    --food: #e14f3d;
    --food-bg: #fbe9e6;
    --automotive: #f2891e;
    --automotive-bg: #fdedde;
    --retail: #7c5cfc;
    --retail-bg: #efeafe;
  
    --font-display: 'Sora', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;
    
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-full: 9999px;
  }
  
  /* Reset & Ergonomie */
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
  }
  
  body {
    background-color: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    padding-bottom: calc(85px + env(safe-area-inset-bottom, 0px));
  }
  
  h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
  }
  
  a {
    text-decoration: none;
    color: inherit;
  }
  
  /* Logo & Gradient */
  .brand-gradient-text {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  .logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.15rem;
  }
  
  .logo-pin {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(160deg, #4fa8f0 0%, #123b7a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
  }
  
  /* Header */
  .top-nav {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background-color: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }
  
  .btn-login {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 7px 16px;
    border-radius: var(--radius-full);
    border: 1px solid var(--line);
    background: var(--surface);
    transition: transform 0.15s;
  }
  
  .btn-login:active {
    transform: scale(0.95);
  }
  
  /* Hero Section */
  .hero {
    padding: 36px 20px 24px;
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-col: column;
    flex-direction: column;
    align-items: center;
  }
  
  .badge-hero {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
  }
  
  .hero h1 {
    font-size: 2rem;
    line-height: 1.2;
    margin-bottom: 14px;
  }
  
  .hero-desc {
    font-size: 0.9rem;
    color: var(--ink-soft);
    line-height: 1.55;
    margin-bottom: 24px;
  }
  
  .hero-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 380px;
    margin-bottom: 28px;
  }
  
  /* Boutons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.15s ease, opacity 0.15s ease;
  }
  
  .btn:active {
    transform: scale(0.98);
  }
  
  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 104, 216, 0.25);
  }
  
  .btn-secondary {
    background: var(--surface);
    color: var(--ink);
    border: 1px solid var(--line);
  }
  
  .btn-white {
    background: #ffffff;
    color: var(--ink);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.85rem;
  }
  
  /* Barre de recherche factice */
  .search-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 440px;
    padding: 8px 12px 8px 16px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-full);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  }
  
  .search-icon {
    color: var(--primary);
    flex-shrink: 0;
  }
  
  .search-bar input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.85rem;
    color: var(--ink);
  }
  
  .search-shortcut {
    font-size: 0.75rem;
    font-weight: 600;
    color: #ffffff;
    background: var(--ink);
    padding: 6px 14px;
    border-radius: var(--radius-full);
  }
  
  /* Sections */
  .section-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 20px;
  }
  
  .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
  }
  
  .section-header h2 {
    font-size: 1.15rem;
  }
  
  .section-link {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
  }
  
  /* Grille Catégories */
  .categories-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .category-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: border-color 0.2s, transform 0.15s;
  }
  
  .category-card:active {
    transform: scale(0.98);
  }
  
  .cat-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
  }
  
  .category-card h3 {
    font-size: 0.95rem;
    margin-bottom: 4px;
  }
  
  .category-card p {
    font-size: 0.75rem;
    color: var(--ink-soft);
    line-height: 1.35;
  }
  
  .card-health .cat-icon { background: var(--health-bg); color: var(--health); }
  .card-food .cat-icon { background: var(--food-bg); color: var(--food); }
  .card-auto .cat-icon { background: var(--automotive-bg); color: var(--automotive); }
  .card-retail .cat-icon { background: var(--retail-bg); color: var(--retail); }
  
  /* Bloc Features */
  .card-features {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
  }
  
  .features-intro {
    text-align: center;
    max-width: 460px;
    margin: 0 auto 24px;
  }
  
  .features-intro h2 {
    font-size: 1.25rem;
    margin-bottom: 8px;
  }
  
  .features-intro p {
    font-size: 0.85rem;
    color: var(--ink-soft);
  }
  
  .steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .step-card {
    text-align: center;
    padding: 12px;
  }
  
  .step-badge {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    font-size: 0.85rem;
  }
  
  .step-card h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
  }
  
  .step-card p {
    font-size: 0.8rem;
    color: var(--ink-soft);
  }
  
  /* Bannière CTA */
  .cta-banner {
    background: linear-gradient(135deg, var(--ink) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .cta-banner h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
  }
  
  .cta-banner p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
    max-width: 440px;
  }
  
  /* Bottom Bar Mobile Fixe */
  .bottom-bar {
    position: fixed;
    bottom: 0;
    inset-x: 0;
    left: 0;
    right: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0px));
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--line);
  }
  
  .btn-grow {
    flex: 1;
    padding: 12px 16px;
    font-size: 0.85rem;
  }
  
  .btn-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  
  /* Desktop & Tablettes (>= 768px) */
  @media (min-width: 768px) {
    body {
      padding-bottom: 0;
    }
  
    .hero {
      padding: 60px 20px 40px;
    }
  
    .hero h1 {
      font-size: 3rem;
    }
  
    .hero-actions {
      flex-direction: row;
      max-width: 440px;
    }
  
    .categories-grid {
      grid-template-columns: repeat(4, 1fr);
    }
  
    .steps-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  
    .bottom-bar {
      display: none;
    }
  }