/* ===================================
   RESPONSIVE DESIGN
   Breakpoints:
   - Mobile: < 768px
   - Tablet: 768px - 1024px
   - Desktop: > 1024px
   =================================== */

/* ===================================
   TABLET (max-width: 1024px)
   =================================== */

@media screen and (max-width: 1024px) {
    
    /* Typographie */
    :root {
        --font-size-h1: 42px;
        --font-size-h2: 32px;
        --font-size-h3: 24px;
        --font-size-h4: 20px;
        --spacing-xxl: 64px;
        --spacing-xl: 48px;
    }
    
    /* Container */
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* Header */
    .header-content {
        gap: var(--spacing-md);
    }
    
    .nav-menu {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        font-size: var(--font-size-small);
        padding: var(--spacing-xs);
    }
    
    /* Hero */
    .hero h1 {
        font-size: 42px;
    }
    
    .hero .lead {
        font-size: 18px;
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .hero-stat-number {
        font-size: 36px;
    }
    
    /* Grilles */
    .probleme-grid,
    .solution-features,
    .confiance-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-md);
    }
    
    .b2b-targets {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    /* Comparaison */
    .comparaison-header,
    .comparaison-row {
        font-size: var(--font-size-small);
        padding: var(--spacing-sm);
    }
    
    .economie-annuelle {
        font-size: 36px;
    }
    
    /* CTA Final */
    .cta-final h2 {
        font-size: 36px;
    }
}

/* ===================================
   MOBILE (max-width: 768px)
   =================================== */

@media screen and (max-width: 768px) {
    
    /* Typographie */
    :root {
        --font-size-h1: 32px;
        --font-size-h2: 28px;
        --font-size-h3: 22px;
        --font-size-h4: 18px;
        --font-size-large: 16px;
        --spacing-xxl: 48px;
        --spacing-xl: 32px;
        --spacing-lg: 24px;
    }
    
    h1 {
        font-size: 32px;
        line-height: 1.3;
    }
    
    h2 {
        font-size: 28px;
        line-height: 1.3;
    }
    
    /* Container */
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    /* Header */
    .header-content {
        padding: var(--spacing-sm) 0;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .navigation {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--bg-white);
        box-shadow: var(--box-shadow-large);
        transition: left 0.3s ease;
        z-index: 2000;
        padding: var(--spacing-xl) var(--spacing-md);
        margin: 0;
    }
    
    .navigation.active {
        left: 0;
    }
    
    .nav-menu {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }
    
    .nav-link {
        width: 100%;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
        font-size: var(--font-size-base);
    }
    
    .header-cta {
        gap: var(--spacing-xs);
    }
    
    .btn-phone {
        display: none;
    }
    
    .btn-primary {
        padding: 10px 20px;
        font-size: var(--font-size-small);
    }
    
    .burger-menu {
        display: flex;
    }
    
    .burger-menu.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .burger-menu.active span:nth-child(2) {
        opacity: 0;
    }
    
    .burger-menu.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Overlay pour menu mobile */
    body::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 1999;
    }
    
    body.menu-open::after {
        opacity: 1;
        visibility: visible;
    }
    
    body.menu-open {
        overflow: hidden;
    }
    
    /* Hero */
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero h1 {
        font-size: 28px;
        margin-bottom: var(--spacing-sm);
    }
    
    .hero .lead {
        font-size: 16px;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-cta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
        margin-top: var(--spacing-lg);
        padding-top: var(--spacing-md);
    }
    
    .hero-stat-number {
        font-size: 32px;
    }
    
    .hero-stat-label {
        font-size: var(--font-size-small);
    }
    
    /* Boutons */
    .btn-large {
        padding: 14px 32px;
        font-size: var(--font-size-base);
        width: 100%;
    }
    
    /* Grilles */
    .probleme-grid,
    .solution-features,
    .confiance-grid,
    .b2b-targets {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .probleme-card,
    .solution-feature,
    .confiance-card,
    .b2b-target {
        padding: var(--spacing-md);
    }
    
    .probleme-icon,
    .solution-icon,
    .confiance-icon {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }
    
    /* Process Steps */
    .process-steps {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .process-step {
        padding-left: 60px;
    }
    
    .process-step::before {
        width: 35px;
        height: 35px;
        font-size: var(--font-size-base);
    }
    
    /* Comparaison Table */
    .comparaison-header {
        display: none;
    }
    
    .comparaison-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
        padding: var(--spacing-md);
        border-bottom: 2px solid var(--border-color);
    }
    
    .comparaison-row > div:first-child {
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: var(--spacing-xs);
    }
    
    .comparaison-row > div:nth-child(2)::before {
        content: 'Avant : ';
        font-weight: 600;
        color: var(--text-secondary);
    }
    
    .comparaison-row > div:nth-child(3)::before {
        content: 'Avec nous : ';
        font-weight: 600;
        color: var(--text-secondary);
    }
    
    .comparaison-economie {
        padding: var(--spacing-md);
        font-size: 18px;
    }
    
    .economie-annuelle {
        font-size: 32px;
    }
    
    /* B2B Banner */
    .b2b-banner {
        padding: var(--spacing-lg);
    }
    
    .b2b-banner h3 {
        font-size: 24px;
    }
    
    .b2b-banner p {
        font-size: var(--font-size-base);
    }
    
    /* PayPlug Badge */
    .payplug-badge {
        padding: var(--spacing-lg);
    }
    
    .payplug-badge h3 {
        font-size: 24px;
    }
    
    .payplug-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    /* CTA Final */
    .cta-final {
        padding: var(--spacing-xl) 0;
    }
    
    .cta-final h2 {
        font-size: 28px;
    }
    
    .cta-final p {
        font-size: var(--font-size-base);
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
    
    .cta-urgence {
        font-size: var(--font-size-base);
        padding: var(--spacing-sm);
    }
    
    /* Footer */
    .footer {
        padding: var(--spacing-lg) 0 var(--spacing-md) 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-section {
        text-align: center;
    }
    
    .footer-section ul {
        align-items: center;
    }
    
    .footer-bottom p {
        font-size: 12px;
        line-height: 1.5;
    }
    /* Header mobile */
    .header-content {
        padding: 10px 0;
        gap: 12px;
    }
    
    .logo-text {
        font-size: 18px;
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }
    
    .navigation {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--bg-white);
        box-shadow: var(--box-shadow-large);
        transition: left 0.3s ease;
        z-index: 2000;
        padding: 80px 0 24px 0;
        margin: 0;
        justify-content: flex-start;
    }
    
    .navigation.active {
        left: 0;
    }
    
    .nav-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
    }
    
    .nav-link {
        width: 100%;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
        font-size: 16px;
        border-radius: 0;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .header-cta {
        gap: 8px;
    }
    
    .btn-phone {
        display: none;
    }
    
    .header-cta .btn-primary {
        padding: 8px 16px;
        font-size: 14px;
    }
    
    .burger-menu {
        display: flex;
        order: 3;
    }
    
    .burger-menu.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .burger-menu.active span:nth-child(2) {
        opacity: 0;
    }
    
    .burger-menu.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Overlay pour menu mobile */
    body::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 1999;
    }
    
    body.menu-open::after {
        opacity: 1;
        visibility: visible;
    }
    
    body.menu-open {
        overflow: hidden;
    }
    }

    /* Ajustement pour tablettes */
    @media screen and (max-width: 1024px) and (min-width: 769px) {
        
        .header-content {
            gap: 16px;
        }
        
        .nav-link {
            font-size: 14px;
            padding: 8px 12px;
        }
        
        .btn-phone {
            font-size: 13px;
            padding: 8px 12px;
        }
        
        .header-cta .btn-primary {
            padding: 9px 20px;
            font-size: 14px;
        }

    }

/* ===================================
   PETITS MOBILES (max-width: 480px)
   =================================== */

@media screen and (max-width: 480px) {
    
    :root {
        --font-size-h1: 26px;
        --font-size-h2: 24px;
        --font-size-h3: 20px;
        --spacing-xl: 24px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .hero h1 {
        font-size: 24px;
    }
    
    .hero .lead {
        font-size: 15px;
    }
    
    .hero-stat-number {
        font-size: 28px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 15px;
    }
    
    .cta-final h2 {
        font-size: 24px;
    }
    
    .economie-annuelle {
        font-size: 28px;
    }
    
    .b2b-banner h3 {
        font-size: 22px;
    }
    
    .payplug-badge h3 {
        font-size: 22px;
    }
}

/* ===================================
   LANDSCAPE MOBILE
   =================================== */

@media screen and (max-width: 768px) and (orientation: landscape) {
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero h1 {
        font-size: 26px;
    }
    
    .hero .lead {
        font-size: 15px;
        margin-bottom: var(--spacing-sm);
    }
    
    .hero-stats {
        flex-direction: row;
        gap: var(--spacing-md);
        margin-top: var(--spacing-md);
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
}

/* ===================================
   PRINT STYLES
   =================================== */

@media print {
    
    .header,
    .burger-menu,
    .navigation,
    .btn,
    .cta-final,
    .footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
    }
    
    .section {
        page-break-inside: avoid;
        padding: 20px 0;
    }
    
    h1, h2, h3 {
        page-break-after: avoid;
    }
    
    a {
        text-decoration: underline;
        color: #000;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 10pt;
    }
}

/* ===================================
   ACCESSIBILITÉ
   =================================== */

/* Mode contraste élevé */
@media (prefers-contrast: high) {
    
    :root {
        --primary-color: #0052CC;
        --border-color: #000;
        --text-secondary: #000;
    }
    
    .btn {
        border-width: 3px;
    }
    
    .nav-link:focus,
    .btn:focus {
        outline: 3px solid var(--primary-color);
        outline-offset: 2px;
    }
}

/* Réduction des animations */
@media (prefers-reduced-motion: reduce) {
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .fade-in {
        opacity: 1;
        transform: none;
    }
}

/* Mode sombre (si le système est en dark mode) */
@media (prefers-color-scheme: dark) {
    
    /* Le site garde ses couleurs par défaut car c'est un site B2B professionnel */
    /* mais on peut améliorer le contraste de certains éléments */
    
    .probleme-card,
    .solution-feature,
    .confiance-card {
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
    }
}