/* Responsive Design */

/* Tablettes (768px et moins) */
@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }
    
    .container {
        margin: 0;
        border-radius: var(--radius-lg);
    }
    
    .header {
        padding: 1.5rem 1rem;
    }
    
    .organization-name {
        font-size: 1.5rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .main-content {
        padding: 1.5rem;
    }
    
    .donation-card {
        padding: 1.5rem;
    }
    
    .card-title {
        font-size: 1.5rem;
    }
    
    .card-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.125rem;
    }
    
    .preset-amounts {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 0.75rem;
    }
    
    .amount-btn {
        padding: 0.75rem 0.5rem;
        font-size: 1rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .payment-methods {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 0.75rem;
    }
    
    .payment-label {
        padding: 1rem 0.75rem;
    }
    
    .payment-icon {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1.25rem;
    }
    
    .donate-btn {
        width: 100%;
        padding: 1rem 2rem;
    }
    
    .conversion-display {
        padding: 1rem;
    }
    
    .conversion-amount {
        font-size: 1.25rem;
    }
}

/* Mobiles (480px et moins) */
@media (max-width: 480px) {
    body {
        padding: 0;
    }
    
    .container {
        border-radius: 0;
        min-height: 100vh;
    }
    
    .header {
        padding: 1rem;
    }
    
    .organization-name {
        font-size: 1.25rem;
        line-height: 1.3;
    }
    
    .tagline {
        font-size: 0.875rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .donation-card {
        padding: 1rem;
        box-shadow: none;
        border: none;
    }
    
    .card-header {
        margin-bottom: 1.5rem;
    }
    
    .card-title {
        font-size: 1.375rem;
    }
    
    .form-section {
        margin-bottom: 1.5rem;
        padding-bottom: 1.5rem;
    }
    
    .section-title {
        font-size: 1rem;
        margin-bottom: 1rem;
    }
    
    .preset-amounts {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
    
    .amount-btn {
        padding: 0.75rem 0.25rem;
        font-size: 0.875rem;
    }
    
    .custom-amount {
        max-width: 100%;
    }
    
    .input-group input {
        padding: 0.75rem 1rem 0.75rem 2.5rem;
    }
    
    .currency-symbol {
        left: 0.75rem;
        font-size: 0.875rem;
    }
    
    .form-group input {
        padding: 0.75rem;
        font-size: 0.875rem;
    }
    
    .input-label {
        font-size: 0.8125rem;
    }
    
    .payment-methods {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
    
    .payment-label {
        padding: 0.75rem 0.5rem;
        gap: 0.5rem;
    }
    
    .payment-icon {
        width: 2rem;
        height: 2rem;
        font-size: 1rem;
    }
    
    .payment-name {
        font-size: 0.75rem;
    }
    
    .donate-btn {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
        min-width: auto;
    }
    
    .conversion-display {
        padding: 0.875rem;
        margin-top: 1rem;
    }
    
    .conversion-label {
        font-size: 0.8125rem;
    }
    
    .conversion-amount {
        font-size: 1.125rem;
    }
    
    .exchange-rate {
        font-size: 0.8125rem;
    }
    
    .success-message,
    .error-message-global {
        padding: 0.875rem 1rem;
        font-size: 0.875rem;
    }
    
    .footer {
        padding: 1rem;
        font-size: 0.875rem;
    }
    
    .security-note {
        font-size: 0.8125rem;
    }
}

/* Très petits écrans (360px et moins) */
@media (max-width: 360px) {
    .organization-name {
        font-size: 1.125rem;
    }
    
    .card-title {
        font-size: 1.25rem;
    }
    
    .preset-amounts {
        grid-template-columns: 1fr;
    }
    
    .amount-btn {
        text-align: center;
    }
    
    .payment-methods {
        grid-template-columns: 1fr;
    }
    
    .payment-label {
        flex-direction: row;
        justify-content: flex-start;
        text-align: left;
        padding: 0.75rem;
    }
    
    .payment-icon {
        margin-bottom: 0;
        margin-right: 0.75rem;
    }
}

/* Écrans larges (1200px et plus) */
@media (min-width: 1200px) {
    .container {
        max-width: 900px;
    }
    
    .main-content {
        padding: 3rem;
    }
    
    .donation-card {
        padding: 3rem;
    }
    
    .preset-amounts {
        grid-template-columns: repeat(3, 1fr);
        max-width: 600px;
        margin: 0 auto;
    }
    
    .payment-methods {
        grid-template-columns: repeat(4, 1fr);
        max-width: 800px;
        margin: 0 auto;
    }
    
    .form-grid {
        max-width: 600px;
        margin: 0 auto;
    }
}

/* Amélioration de l'accessibilité sur mobile */
@media (max-width: 768px) {
    /* Augmentation de la taille des zones tactiles */
    .amount-btn,
    .payment-label,
    .donate-btn {
        min-height: 44px;
    }
    
    /* Espacement amélioré pour les éléments interactifs */
    .payment-option {
        margin-bottom: 0.5rem;
    }
    
    /* Amélioration de la lisibilité */
    .conversion-display {
        font-size: 0.9rem;
        line-height: 1.5;
    }
}

/* Mode sombre (si supporté par le système) */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-light: #9ca3af;
        
        --bg-primary: #1f2937;
        --bg-secondary: #374151;
        --bg-accent: #4b5563;
        
        --border-color: #4b5563;
    }
    
    body {
        background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    }
    
    .container {
        background: var(--bg-primary);
        box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    }
    
    .donation-card {
        background: var(--bg-primary);
        border-color: var(--border-color);
    }
    
    .amount-btn {
        background: var(--bg-secondary);
        color: var(--text-primary);
        border-color: var(--border-color);
    }
    
    .form-group input,
    .input-group input {
        background: var(--bg-secondary);
        border-color: var(--border-color);
        color: var(--text-primary);
    }
    
    .payment-label {
        background: var(--bg-secondary);
        border-color: var(--border-color);
        color: var(--text-primary);
    }
}

/* Réduction des animations pour les utilisateurs sensibles */
@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;
    }
    
    .amount-btn::before {
        display: none;
    }
}

/* Amélioration du contraste pour l'accessibilité */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
    
    .amount-btn,
    .payment-label {
        border-width: 3px;
    }
    
    .form-group input,
    .input-group input {
        border-width: 2px;
    }
}