* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #1a1a1a;
    color: white;
    overflow-x: hidden;
}

header {
    background-color: #000;
    padding: 35px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #0AEFFF;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-container { display: flex; align-items: center; gap: 10px; }
.logo { width: 40px; border-radius: 50%; border: 1px solid #0AEFFF; }
.brand { font-weight: bold; color: #0AEFFF; font-size: 0.9em; }

/* Botón Volver para internas (no tocar) */
.nav-volver {
    color: #0AEFFF;
    text-decoration: none;
    border: 1px solid #0AEFFF;
    padding: 5px 12px;
    border-radius: 5px;
    font-size: 0.8em;
}