* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

        .image-section {
            width: 40%;
            background:  linear-gradient(rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.74)), url('../img/fondo_index.jpg');
            background-size: cover;
            background-position: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 2rem;
            color: white;
            text-align: center;
        }

        .image-content {
            max-width: 80%;
        }

        .image-section h1 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: #4CAF50;
            font-weight: 700;
        }

        .image-section p {
            font-size: 1.1rem;
            line-height: 1.6;
            margin-bottom: 2rem;
        }

        .features {
            margin-top: 2rem;
            text-align: left;
        }

        .feature {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }

        .feature i {
            color: #4CAF50;
            font-size: 1.5rem;
            margin-right: 1rem;
            min-width: 30px;
        }

        .login-section {
            width: 65%;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 2rem;
        }

        .login-container {
            max-width: 75%;
            width: 100%;
            padding: 2.5rem;
            background: white;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);

        }

        .logo {
            width: 90%;
            margin: 0 auto 1.5rem;
            display: block;
        }

        .login-container h2 {
            color: #333;
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
            font-weight: 600;
        }

        .description {
            color: #666;
            margin-bottom: 2rem;
            line-height: 1.6;
            font-size: 1.05rem;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: #444;
        }

        .input-with-icon {
            position: relative;
        }

        .input-with-icon i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #777;
        }

        .form-control {
            width: 100%;
            padding: 14px 14px 14px 45px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s;
        }

        .form-control:focus {
            border-color: #4CAF50;
            box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
            outline: none;
        }

        .btn-login {
            background-color: #4CAF50;
            color: white;
            border: none;
            padding: 14px;
            width: 100%;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 1rem;
            box-shadow: 0 4px 6px rgba(76, 175, 80, 0.3);
        }

        .btn-login:hover {
            background-color: #45a049;
            transform: translateY(-2px);
            box-shadow: 0 6px 8px rgba(76, 175, 80, 0.4);
        }

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

        .forgot-password {
            display: block;
            margin-top: 1.5rem;
            color: #4CAF50;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }

        .forgot-password:hover {
            color: #388E3C;
            text-decoration: underline;
        }

        .divider {
            display: flex;
            align-items: center;
            margin: 1.5rem 0;
        }

        .divider::before,
        .divider::after {
            content: "";
            flex: 1;
            border-bottom: 1px solid #ddd;
        }

        .divider span {
            padding: 0 10px;
            color: #777;
        }

        .social-login {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .social-btn {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #f5f5f5;
            color: #555;
            border: 1px solid #ddd;
            cursor: pointer;
            transition: all 0.3s;
        }

        .social-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }

        .signup-link {
            color: #666;
            margin-top: 1.5rem;
            font-size: 0.95rem;
        }

        .signup-link a {
            color: #4CAF50;
            text-decoration: none;
            font-weight: 500;
        }

        .signup-link a:hover {
            text-decoration: underline;
        }

        /* Responsive */
        @media (max-width: 992px) {
            body {
                flex-direction: column;
            }
            
            .image-section, 
            .login-section {
                width: 100%;
                background: none;
            }

            .image-content {
                display: none;
            }
            
            
            .image-section {
                padding: 2rem 1rem;
                min-height: 300px;
            }
            
            .login-container {
                max-width: 500px;
                margin: -80px auto 2rem;
                padding: 2rem;


            }
        }

                .error-message {
            color: #ff3860;
            font-size: 14px;
            margin-top: 10px;
            text-align: center;
        }
        /* ====================================================================
   Modo Oscuro Automático (prefers-color-scheme: dark)
   ==================================================================== */

@media (prefers-color-scheme: dark) {
    :root {
        /* Variables para modo oscuro */
        --dark-bg-primary: #1E1E1E;
        --dark-bg-secondary: #2D2D2D;
        --dark-text-primary: #F0F0F0;
        --dark-text-secondary: #B0B0B0;
        --dark-border: #444;
        --dark-shadow: rgba(0, 0, 0, 0.5);
        --primary-color: #4CAF50;
        --primary-hover: #3d8b40;
        --primary-active: #2e6b31;
    }

    body {
        background-color: var(--dark-bg-primary);
        color: var(--dark-text-primary);
    }

    .login-container {
        background-color: var(--dark-bg-secondary);
        box-shadow: 0 8px 24px var(--dark-shadow);
    }

    .login-container h2 {
        color: var(--dark-text-primary);
    }

    .description {
        color: var(--dark-text-secondary);
    }

    .form-group label {
        color: var(--dark-text-secondary);
    }

    .form-control {
        background-color: rgba(255, 255, 255, 0.08);
        border-color: var(--dark-border);
        color: var(--dark-text-primary);
    }

    .form-control:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.3);
    }

    .form-control::placeholder {
        color: var(--dark-text-secondary);
    }

    .divider::before,
    .divider::after {
        border-bottom: 1px solid var(--dark-border);
    }

    .divider span {
        color: var(--dark-text-secondary);
    }

    .social-btn {
        background-color: rgba(255, 255, 255, 0.1);
        border-color: var(--dark-border);
        color: var(--dark-text-secondary);
    }

    .social-btn:hover {
        background-color: rgba(255, 255, 255, 0.15);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .signup-link {
        color: var(--dark-text-secondary);
    }

    .signup-link a {
        color: var(--primary-color);
    }

    /* Estados interactivos */
    .btn-login:hover {
        background-color: var(--primary-hover);
        box-shadow: 0 6px 8px rgba(0, 0, 0, 0.3);
    }

    .btn-login:active {
        background-color: var(--primary-active);
    }

    .forgot-password:hover {
        color: var(--primary-hover);
    }

    /* Elementos que conservan el color principal */
    .image-section h1,
    .feature i,
    .btn-login,
    .forgot-password,
    .signup-link a {
        color: var(--primary-color);
    }

    /* Responsive: ajuste para imagen de fondo */
    @media (max-width: 992px) {
        .image-section {
            background: linear-gradient(rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.85)), url('../img/fondo_index.jpg');
            background-size: cover;
            background-position: center;
        }
    }
}