/* Login Page Stylesheet */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            overflow-x: hidden;
            background: #0F172A;
        }

        .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            min-height: 100vh;
        }

        /* Left Side - Promotional */
        .promo-section {
            background: linear-gradient(135deg, #667EEA 0%, #764BA2 100%);
            padding: 4rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            overflow: hidden;
        }

        .promo-section::before {
            content: '';
            position: absolute;
            width: 500px;
            height: 500px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            top: -250px;
            right: -250px;
            animation: float 8s ease-in-out infinite;
        }

        .promo-section::after {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            bottom: -150px;
            left: -150px;
            animation: float 6s ease-in-out infinite reverse;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(30px); }
        }

        .logo-section {
            z-index: 1;
        }

        .logo {
            color: white;
            font-size: 2.5rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }

        .logo i {
            animation: pulse 2s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.1); }
        }

        .tagline {
            color: rgba(255, 255, 255, 0.9);
            font-size: 1.1rem;
            font-weight: 300;
        }

        .features {
            z-index: 1;
            margin: 3rem 0;
        }

        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 1.5rem;
            margin-bottom: 2.5rem;
            opacity: 0;
            animation: slideIn 0.6s ease forwards;
        }

        .feature-item:nth-child(1) { animation-delay: 0.2s; }
        .feature-item:nth-child(2) { animation-delay: 0.4s; }
        .feature-item:nth-child(3) { animation-delay: 0.6s; }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateX(-30px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .feature-icon {
            width: 60px;
            height: 60px;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(10px);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: white;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .feature-item:hover .feature-icon {
            transform: scale(1.1) rotate(5deg);
        }

        .feature-content h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .feature-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            z-index: 1;
        }

        .stat-item {
            text-align: center;
            opacity: 0;
            animation: fadeInUp 0.8s ease forwards;
        }

        .stat-item:nth-child(1) { animation-delay: 0.8s; }
        .stat-item:nth-child(2) { animation-delay: 1s; }
        .stat-item:nth-child(3) { animation-delay: 1.2s; }

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

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: white;
            margin-bottom: 0.3rem;
        }

        .stat-label {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }

        /* Right Side - Login Form */
        /* Style pour l'élément d'erreur */
.alert-error {
    background-color: #fce4e4; /* Fond rouge très clair */
    color: #c70000;          /* Texte rouge foncé */
    border: 1px solid #c70000;
    padding: 10px 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    font-size: 0.9em;
    font-weight: 600;
    /* Assurez-vous que le display: none; est bien géré par le JS initialement */
}

        .login-section {
            background: white;
            padding: 4rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .login-container {
            width: 100%;
            max-width: 450px;
            animation: fadeIn 0.8s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .login-header {
            margin-bottom: 3rem;
        }

        .login-header h1 {
            font-size: 2.5rem;
            color: #1F2937;
            margin-bottom: 0.5rem;
            font-weight: 700;
        }

        .login-header p {
            color: #6B7280;
            font-size: 1rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            color: #374151;
            font-weight: 600;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }

        .input-wrapper {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: #9CA3AF;
            font-size: 1.1rem;
        }

        .form-control {
            width: 100%;
            padding: 1rem 1rem 1rem 3rem;
            border: 2px solid #E5E7EB;
            border-radius: 12px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: #F9FAFB;
        }

        .form-control:focus {
            outline: none;
            border-color: #667EEA;
            background: white;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }

        .password-toggle {
            position: absolute;
            right: 1rem;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #9CA3AF;
            cursor: pointer;
            font-size: 1.1rem;
            transition: color 0.2s;
        }

        .password-toggle:hover {
            color: #667EEA;
        }

        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
        }

        .checkbox-wrapper {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .checkbox-wrapper input[type="checkbox"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: #667EEA;
        }

        .checkbox-wrapper label {
            color: #6B7280;
            font-size: 0.9rem;
            cursor: pointer;
            margin: 0;
        }

        .forgot-password {
            color: #667EEA;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            transition: color 0.2s;
        }

        .forgot-password:hover {
            color: #764BA2;
        }

        .btn-login {
            width: 100%;
            padding: 1rem;
            background: linear-gradient(135deg, #667EEA 0%, #764BA2 100%);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-login::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
            transition: left 0.5s;
        }

        .btn-login:hover::before {
            left: 100%;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
        }

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

        .divider {
            display: flex;
            align-items: center;
            margin: 2rem 0;
            color: #9CA3AF;
            font-size: 0.9rem;
        }

        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: #E5E7EB;
        }

        .divider span {
            padding: 0 1rem;
        }

        .social-login {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }

        .btn-social {
            padding: 0.9rem;
            border: 2px solid #E5E7EB;
            border-radius: 12px;
            background: white;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 600;
            color: #374151;
            transition: all 0.3s ease;
        }

        .btn-social:hover {
            border-color: #667EEA;
            background: #F9FAFB;
            transform: translateY(-2px);
        }

        .btn-social i {
            font-size: 1.2rem;
        }

        .signup-link {
            text-align: center;
            margin-top: 2rem;
            color: #6B7280;
            font-size: 0.95rem;
        }

        .signup-link a {
            color: #667EEA;
            text-decoration: none;
            font-weight: 600;
            transition: color 0.2s;
        }

        .signup-link a:hover {
            color: #764BA2;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
            }

            .promo-section {
                display: none;
            }

            .login-section {
                padding: 2rem;
            }
        }

        @media (max-width: 640px) {
            .social-login {
                grid-template-columns: 1fr;
            }

            .stats {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }

        /* Loading Animation */
        .btn-login.loading {
            pointer-events: none;
            opacity: 0.7;
        }

        .btn-login.loading::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            border: 2px solid white;
            border-top-color: transparent;
            border-radius: 50%;
            animation: spin 0.6s linear infinite;
            margin-left: 10px;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }