/* Stile Globale e Variabili */
:root {
    --primary-color: #004a99; /* Blu aziendale scuro */
    --secondary-color: #007bff; /* Blu più acceso per link e hover */
    --background-color: #f4f7f9; /* Sfondo leggermente grigio */
    --card-background-color: #ffffff;
    --text-color: #333333;
    --header-background-color: #ffffff;
    --footer-text-color: #6c757d;
    --border-color: #dee2e6;
    --font-family-headings: 'Roboto', sans-serif;
    --font-family-body: 'Source Sans Pro', sans-serif;
}

body {
    margin: 0;
    font-family: var(--font-family-body);
    color: var(--text-color);
    background-color: var(--background-color);
}

/* --- STILI HOME PAGE (index.php) --- */

.portal-header {
    background-color: var(--header-background-color);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.portal-header .logo {
    height: 40px;
    margin-right: 1.5rem;
}

.portal-header h1 {
    font-family: var(--font-family-headings);
    font-size: 1.5rem;
    font-weight: 500;
    margin: 0;
    color: var(--primary-color);
}

.portal-main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.manuals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.manual-card {
    background-color: var(--card-background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-color);
    display: flex;
    align-items: center;
    padding: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.manual-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.manual-card .card-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-right: 1.5rem;
}

.manual-card .card-content h3 {
    font-family: var(--font-family-headings);
    font-size: 1.2rem;
    margin: 0 0 0.25rem 0;
}

.manual-card .card-content p {
    margin: 0;
    font-size: 0.9rem;
    color: #6c757d;
}

.portal-footer {
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
    font-size: 0.85rem;
    color: var(--footer-text-color);
    border-top: 1px solid var(--border-color);
}

/* --- STILI PAGINA LETTURA (manuale.php) --- */

.viewer-body {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.viewer-header {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: #ffffff;
    flex-shrink: 0;
}

.viewer-header .home-button {
    font-size: 1.5rem;
    color: #ffffff;
    text-decoration: none;
    margin-right: 1.5rem;
    transition: transform 0.2s ease;
}
.viewer-header .home-button:hover {
    transform: scale(1.1);
}

.viewer-header .manual-title {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 500;
    font-family: var(--font-family-headings);
}

.viewer-main {
    flex-grow: 1;
    background-color: #fff;
}

.viewer-main iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.error-message {
    padding: 3rem;
    text-align: center;
}