:root {
    /* Nouvelle palette de couleurs bancaires */
    --primary-color: #1e3a8a;  /* Bleu marine professionnel */
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --secondary-color: #14b8a6;  /* Turquoise confiance */
    --accent-color: #fbbf24;     /* Or/Jaune pour aspect premium */
    --success-color: #059669;
    --error-color: #dc2626;
    --warning-color: #d97706;
    
    /* Mise à jour des dégradés */
    --gradient-primary: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    --gradient-premium: linear-gradient(135deg, #fbbf24, #f59e0b);
    
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-light: #9ca3af;
    --border-color: #e5e7eb;
    --background-light: #f9fafb;
    --background-dark: #1f2937;
    
    /* Ombres sophistiquées */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Animations */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Nouvelles variables pour les animations */
    --animate-duration: 0.8s;
    --animate-delay: 0.2s;
    --gradient-hover: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    --gradient-success: linear-gradient(135deg, var(--success-color), #059669);
    --border-default: #10b981;  /* Vert pour les bordures par défaut */
    --border-hover: #059669;    /* Vert plus foncé pour le hover */
    --border-focus: #047857;    /* Vert encore plus foncé pour le focus */
}

/* Reset et styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Ajout d'un fond bancaire */
body {
    background-color: #f8fafc;
    background-size: 100% 100%, 100% 100%, 20px 20px, 20px 20px;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Container principal avec illustration */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    background: 
        radial-gradient(at 100% 0%, rgba(30, 58, 138, 0.05) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(20, 184, 166, 0.05) 0px, transparent 50%);
}

/* Style premium pour auth-box */
.auth-box {
    background-image: url('https://www.jsatservices.com/images/lu.svg');
    background-size: cover; /* L'image s'ajuste pour couvrir entièrement */
    background-position: center; /* Centre l'image */
    background-repeat: no-repeat; /* Évite la répétition de l'image */
    
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 1.5rem;
    box-shadow: 
        0 20px 40px -15px rgba(30, 58, 138, 0.15),
        inset 0 0 0 1px rgba(251, 191, 36, 0.1),
        0 0 20px rgba(251, 191, 36, 0.05);
    
    width: 100%;
    max-width: 800px;
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    perspective: 1000px;
    animation: floatIn 0.8s ease-out;
}


/* Navigation des onglets améliorée */
.auth-tabs {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    border-bottom: 2px solid var(--border-color);
    position: relative;
}

.auth-tabs input[type="radio"] {
    display: none;
}

.auth-tabs label {
    padding: 1rem 2rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.auth-tabs label:hover {
    color: var(--primary-color);
}

.auth-tabs label::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.auth-tabs label:hover::after {
    left: 0;
    width: 100%;
}

.auth-tabs input[type="radio"]:checked + label {
    color: var(--primary-color);
}

.auth-tabs input[type="radio"]:checked + label::after {
    transform: scaleX(1);
}

/* Remplacer la section des formulaires par ceci */
.forms-container {
    position: relative;
    width: 100%;
}

/* Modification de l'affichage des formulaires */
.signin-form,
.signup-form {
    display: none;
    opacity: 0;
    transition: opacity var(--transition-slow), transform var(--transition-slow);
    transform: translateY(10px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    animation: formSlideUp 0.8s ease-out;
}

/* Affichage du formulaire actif */
input[type="radio"]#signin-tab:checked ~ .forms-container .signin-form {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

input[type="radio"]#signup-tab:checked ~ .forms-container .signup-form {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Ajout de styles pour assurer la visibilité */
.form-section {
    margin-bottom: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid rgba(30, 58, 138, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-section:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 
        0 20px 40px -15px rgba(0, 0, 0, 0.1),
        0 0 20px rgba(0, 0, 0, 0.1);
}

.form-section h3 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Modification du style des champs de saisie */
.form-group input,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-default); /* Bordure verte par défaut */
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.95);
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05); /* Ombre légère pour la profondeur */
}

.form-group input:hover,
.form-group select:hover {
    border-color: var(--border-hover);
    box-shadow: 0 4px 6px rgba(16, 185, 129, 0.1);
}

/* Effet amélioré sur le focus */
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--border-focus); /* Couleur plus visible au focus */
    box-shadow: 
        0 0 0 3px rgba(4, 120, 87, 0.15), /* Ombre bleue autour du champ */
        0 2px 4px rgba(0, 0, 0, 0.05);
    transform: translateY(-1px);
}

/* Style spécifique pour les champs invalides */
.form-group input:invalid,
.form-group select:invalid {
    border-color: var(--error-color);
}

/* Style pour le champ de type file */
.form-group input[type="file"] {
    border: 2px dashed var(--border-default);
    padding: 1rem;
    background: rgba(255, 255, 255, 0.8);
}

.form-group input[type="file"]:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.95);
}

/* Boutons et liens */
.btn-submit {
    width: 100%;
    padding: 1rem;
    background: var(--gradient-primary);
    color: white;
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.025em;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 10px 20px -10px var(--primary-color),
        0 0 20px rgba(37, 99, 235, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-submit:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-hover);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
}

.btn-submit:hover:before {
    left: 0;
}

.btn-submit span {
    position: relative;
    z-index: 2;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 20px 40px -15px rgba(30, 58, 138, 0.25),
        0 0 30px rgba(30, 58, 138, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-submit:active {
    transform: translateY(0);
}

.forgot-link {
    display: block;
    text-align: center;
    margin-top: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.875rem;
}

/* Cases à cocher personnalisées */
.remember {
    display: flex;
    align-items: center;
    margin: 1rem 0;
}

.remember label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

/* Responsive amélioré */
@media (max-width: 768px) {
    .auth-box {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .form-section {
        padding: 1.5rem;
    }
    
    .auth-tabs {
        gap: 1rem;
    }
    
    .auth-tabs label {
        padding: 0.75rem 1rem;
        font-size: 0.95rem;
    }
}

/* Keyframes pour les animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes floatIn {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Animation des formulaires */
@keyframes formSlideUp {
    0% {
        opacity: 0;
        transform: translateY(40px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Effet de focus amélioré */
input:focus ~ label,
select:focus ~ label {
    color: var(--primary-color);
    transform: translateY(-25px) scale(0.8);
}

/* Animation de chargement du bouton */
.btn-submit.loading {
    background-size: 30px 30px;
    background-image: linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.15) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.15) 50%,
        rgba(255, 255, 255, 0.15) 75%,
        transparent 75%,
        transparent
    );
    animation: loading 1s linear infinite;
}

@keyframes loading {
    from {
        background-position: 0 0;
    }
    to {
        background-position: 60px 30px;
    }
}

/* Styles pour les messages d'alerte */
.alert {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 500;
    z-index: 1000;
    animation: slideDown 0.5s ease-out;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.alert-success {
    background-color: #10b981;
    color: white;
    border: 1px solid #059669;
}

.alert-error {
    background-color: #ef4444;
    color: white;
    border: 1px solid #dc2626;
}

@keyframes slideDown {
    from {
        transform: translate(-50%, -100%);
        opacity: 0;
    }
    to {
        transform: translate(-50%, 0);
        opacity: 1;
    }
}

/* Auto-hide après 5 secondes */
.alert {
    animation: slideDown 0.5s ease-out, fadeOut 0.5s ease-out 4.5s forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
    display: none;
    animation: slideIn 0.3s ease-in-out;
}

.alert-error {
    background-color: #fee2e2;
    border: 1px solid #ef4444;
    color: #b91c1c;
}

.alert-success {
    background-color: #dcfce7;
    border: 1px solid #22c55e;
    color: #15803d;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.alert.show {
    display: block;
}