body {
    font-family: 'Trebuchet MS', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    overflow: hidden;
    flex-direction: column; /* Asegura una disposición adecuada en pantallas pequeñas */
}

/* Video de fondo */
#background-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

/* Contenedor de login y registro */
.login-container, .register-container {
    background: rgba(255, 255, 255, 0.8); 
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
    border: 2px solid #d0e6d7;
}

.login-container h2, .register-container h2 {
    color: #4CAF50; 
    font-size: 28px;
    margin-bottom: 30px;
    font-weight: 600;
}

/* Campos de entrada */
.input-field {
    margin: 10px 0;
    padding: 12px;
    width: 100%;
    border: 2px solid #d0e6d7;
    border-radius: 10px;
    font-size: 16px;
    color: #333;
    background-color: #f7f9f7;
    box-sizing: border-box; 
    transition: border-color 0.3s ease;
}

.input-field:focus {
    outline: none;
    border-color: #4CAF50; 
    background-color: #ffffff; 
}

/* Botón de enviar */
.submit-btn {
    background-color: #4CAF50; 
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    transition: background-color 0.3s ease;
}

.submit-btn:hover {
    background-color: #45a049; 
}

/* Pie de formulario */
.form-footer {
    margin-top: 20px;
    font-size: 14px;
    color: #666;
}

.form-footer a {
    color: #4CAF50;
    text-decoration: none;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* Mensajes emergentes */
.flash-message {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    padding: 15px 20px;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    border-radius: 5px;
    font-size: 16px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
    opacity: 1;
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.flash-message.alert-success {
    background-color: #28a745; 
}

.flash-message.alert-danger {
    background-color: #dc3545; 
}

.fade-out {
    opacity: 0;
    transform: translateY(-10px);
}

/* ===== MEDIA QUERIES ===== */

/* Para pantallas medianas */
@media (max-width: 1024px) {
    .login-container, .register-container {
        max-width: 350px;
        padding: 30px;
    }
}

/* Para pantallas pequeñas */
@media (max-width: 768px) {
    body {
        padding: 10px;
        height: auto;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
    }

    .login-container, .register-container {
        max-width: 90%;
        padding: 20px;
    }

    .login-container h2, .register-container h2 {
        font-size: 24px;
    }

    .input-field {
        font-size: 14px;
        padding: 10px;
    }

    .submit-btn {
        font-size: 16px;
        padding: 10px 15px;
    }
}

/* Para pantallas muy pequeñas */
@media (max-width: 480px) {
    .login-container, .register-container {
        padding: 15px;
    }

    .login-container h2, .register-container h2 {
        font-size: 20px;
    }

    .input-field {
        font-size: 14px;
        padding: 8px;
    }

    .submit-btn {
        font-size: 14px;
        padding: 8px 12px;
    }
}