@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

body {
    font-family: 'Roboto', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}

header {
    background-color: #99a4ad;
    color: white;
    padding: 1rem;
    text-align: center;
}


.logo {
    width: 50px;
    height: 50px;
    background-color: #ccc;
    border-radius: 50%;
}


main {
    padding: 2rem;
}


section {
    margin-bottom: 2rem;
}

section:nth-child(odd) {
    background-color: #f4f7fa;
    padding: 2rem;
    border-radius: 5px;
}

h2 {
    color: #819cb1;
}

ul {
    list-style-type: none;
    padding: 0;
}

ul li {
    background-color: white;
    margin: 0.5rem 0;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

ul li:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

button {
    background-color: #819cb1;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: #6d8ba3;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem 0;
}

/* ===== Boton perro ===== */
.btn-hola {
    position: fixed;
    top: 25px;
    left: 25px;
    z-index: 1000;
}

.btn-hola a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.9);
    color: #111;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    backdrop-filter: blur(8px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.18);
    transition: all 0.3s ease;
}

/* Flecha perra */
.btn-hola a::before {
    content: "←";
    font-size: 16px;
    transition: transform 0.3s ease;
}

/* Hover */
.btn-hola a:hover {
    transform: translateX(-4px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.25);
}

/* la flecha tiene buena animacion al pasar por ahi */
.btn-hola a:hover::before {
    transform: translateX(-3px);
}

/* ===== asi se mira bien perro el boton de regresar ===== */
@media (max-width: 768px) {
    .btn-hola {
        top: 15px;
        left: 15px;
    }

    .btn-hola a {
        padding: 8px 16px;
        font-size: 13px;
    }
}