html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}

.page {
    display: flex;
    flex-direction: row;
    min-height: 100vh;
}

/* SIDEBAR BLU */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #1e3a8a 0%, #1e40af 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

/* MAIN CONTENT */
main {
    flex: 1;
    margin-left: 260px;
    background-color: #f8f9fa;
    min-height: 100vh;
}

.content {
    padding: 2rem;
}

/* Header del menu */
.nav-header {
    background-color: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem;
    margin-bottom: 1rem;
}

    .nav-header h3 {
        color: white;
        margin: 0;
        font-size: 1.3rem;
        font-weight: bold;
    }

/* Nav con ul/li */
nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav li {
    padding: 0.3rem 1rem;
}

nav a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    display: block;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.2s ease;
}

    nav a:hover {
        background-color: rgba(255, 255, 255, 0.15);
        color: white;
    }

    nav a.active {
        background-color: rgba(255, 255, 255, 0.25);
        color: white;
        font-weight: 600;
    }