@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;900&display=swap');

* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

body {
    font-family: 'Poppins', sans-serif;
    background: #D2B48C;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.formulario {
    background: #fff;
    border-radius: 1rem;
    padding: 2rem;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 4px 6px rgba(210, 180, 140, 0.2);
}

.formulario h1 {
    text-align: center;
    color: #000000;
    font-weight: 600;
    font-size: 1.75rem;
    margin-bottom: 2rem;
}

.username {
    position: relative;
    margin-bottom: 1.5rem;
}

.username input {
    width: 100%;
    padding: 0.75rem;
    font-size: 0.938rem;
    border: 1px solid #D2B48C;
    border-radius: 0.5rem;
    background: transparent;
    transition: all 0.3s ease;
}

.username label {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.938rem;
    color: #666;
    pointer-events: none;
    transition: all 0.3s ease;
}

.username input:focus,
.username input:valid {
    border-color: #90EE90;
}

.username input:focus ~ label,
.username input:valid ~ label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.75rem;
    padding: 0 0.25rem;
    background: #fff;
    color: #90EE90;
}

.recordar {
    color: #90EE90;
    font-size: 0.875rem;
    text-align: right;
    margin-bottom: 1.5rem;
    cursor: pointer;
    transition: color 0.3s;
}

.recordar:hover {
    color: #32CD32;
}

.registrarse {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
}

.registrarse a {
    color: #90EE90;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.registrarse a:hover {
    color: #32CD32;
}

input[type="submit"] {
    width: 100%;
    padding: 1rem;
    background-color: #90EE90;
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.938rem;
    cursor: pointer;
    transition: background-color 0.3s;
    text-transform: capitalize;
}

input[type="submit"]:hover {
    background-color: #32CD32;
}

/* Nuevo estilo para el botón de regresar */
.regresar {
    text-align: center;
    margin-top: 1rem;
}

.btn-regresar {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #D2B48C;
    color: #fff;
    text-decoration: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.btn-regresar:hover {
    background-color: #C4A484;
    transform: translateY(-2px);
}

/* Responsive */
@media screen and (max-width: 320px) {
    .formulario {
        width: 95%;
        padding: 1.5rem;
    }
    
    .formulario h1 {
        font-size: 1.5rem;
    }

    .btn-regresar {
        padding: 0.6rem 1.2rem;
        font-size: 0.8rem;
    }
}

@media screen and (min-width: 576px) {
    .formulario {
        padding: 2.5rem;
    }
}

@media screen and (min-width: 768px) {
    .formulario {
        padding: 3rem;
    }
}

@media screen and (min-width: 992px) {
    .formulario {
        max-width: 450px;
    }
    
    .username input {
        padding: 1rem;
    }
}