/* Importa un font più moderno da Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&display=swap');

/* =================================
   VARIABILI GLOBALI (CUSTOM PROPERTIES)
   ================================= */
:root {
    --colore-header-footer: #001f3f;
    --colore-card-insegnanti: rgba(0, 31, 63, 0.9);
    --colore-accento-blu: #5c85ad;
    --colore-testo-principale: #f0f0f0;
    --colore-testo-bianco: #ffffff;
    --colore-separatore: #444;
    --raggio-bordo-card: 15px;
    --font-principale: 'Montserrat', sans-serif;
}

/* =================================
   IMPOSTAZIONI GENERALI E SFONDO
   ================================= */

/* Best practice per il box model */
html {
    box-sizing: border-box;
    scroll-behavior: smooth;
}
*, *::before, *::after {
    box-sizing: inherit;
}

body {
    font-family: var(--font-principale);
    margin: 0;
    background-color: rgba(26, 26, 26, 0.92);
    color: var(--colore-testo-principale);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: url('immagini-insegnanti/sfondo.jpg');
    background-size: cover;
    background-position: center;
    filter: blur(4px) brightness(40%);
    transform: scale(1.05);
}

.testo-centrato {
    text-align: center;
}

/* =================================
   HEADER E NAVIGAZIONE
   ================================= */

header {
    background-color: var(--colore-header-footer);
    color: var(--colore-testo-bianco);
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 10px 20px;
    /* --- LAYOUT FLEXBOX (versione robusta) --- */
    display: flex;
    align-items: center;
}

/* --- Elementi Header --- */
#logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 4px solid var(--colore-accento-blu);
    object-fit: cover;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.header-content {
    text-align: center;
    margin: 0 auto; /* Forza la centratura perfetta */
}

.header-immagini-destra {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-icona {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 3px solid var(--colore-accento-blu);
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

header h1 {
    font-family: var(--font-principale);
    font-weight: 700;
    margin: 0 0 10px 0;
}

nav a {
    color: var(--colore-testo-bianco);
    margin: 0 5px;
    text-decoration: none;
    font-weight: bold;
    padding: 8px 15px;
    border-radius: 20px;
    transition: all 0.2s ease-in-out;
}

/* --- Effetti Interattivi Header --- */
nav a:hover,
nav a:focus {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

nav a:active {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(0);
}

#logo:hover,
.header-icona:hover,
.insegnante img:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}


/* =================================
   CONTENUTO PRINCIPALE E SEZIONI
   ================================= */

main {
    padding: 20px;
}

section {
    padding: 40px 20px;
    margin: 0 auto;
    max-width: 800px;
    scroll-margin-top: 120px;
}

h2 {
    color: var(--colore-testo-bianco);
    text-align: center;
    margin-bottom: 30px;
}

hr {
    border: 0;
    height: 1px;
    background-color: var(--colore-separatore);
    margin: 40px auto;
    width: 80%;
}

/* =================================
   COMPONENTI SPECIFICI
   ================================= */

/* --- Sezione Insegnanti --- */
.insegnante {
    background-color: var(--colore-card-insegnanti);
    border-radius: var(--raggio-bordo-card);
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 25px;
}

.insegnante img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--colore-accento-blu);
    flex-shrink: 0;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.insegnante-info h3 {
    margin: 0 0 10px 0;
}

.insegnante-info p {
    margin: 0;
}

/* --- Foto Sala (Sezione Scuola) --- */
.sala-immagini {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 40px;
}

.sala-immagini img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: var(--raggio-bordo-card);
    display: block;
}

/* --- Sezione Galleria --- */
.grid-galleria {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.grid-galleria img {
    width: 100%;
    height: auto;
    border-radius: var(--raggio-bordo-card);
    cursor: pointer;
    transition: opacity 0.3s;
}

.grid-galleria img:hover {
    opacity: 0.7;
}

/* --- Finestra Modale (Lightbox) --- */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    padding-top: 60px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
}

.modal-content {
    margin: auto;
    display: block;
    max-width: 80%;
    max-height: 80vh;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 35px;
    color: var(--colore-testo-principale);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close-btn:hover,
.close-btn:focus {
    color: #bbb;
    text-decoration: none;
}

/* --- Sezione Contatti --- */
.contatti-container {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

#contatti a {
    color: var(--colore-testo-bianco);
    text-decoration: underline;
}

#contatti a:hover {
    color: #cccccc;
}

.social-links {
    margin-top: 0;
}

.social-links a {
    color: var(--colore-testo-bianco);
    font-size: 28px;
    margin: 0 15px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: var(--colore-accento-blu);
    transform: scale(1.2);
}

/* =================================
   MEDIA QUERY PER DISPOSITIVI MOBILI
   ================================= */
@media (max-width: 768px) {

    /* --- Header --- */
    header {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
    }

    header h1 {
        margin-bottom: 10px;
        font-size: 1.5em;
    }

    nav a {
        margin: 0 2px;
        padding: 6px 10px;
        font-size: 0.9em;
    }

    /* --- Contenuto Principale --- */
    section {
        padding: 30px 15px;
        scroll-margin-top: 100px;
    }

    /* --- Sezione Insegnanti --- */
    .insegnante {
        flex-direction: column;
        text-align: center;
    }

    /* --- Foto Sala (Sezione Scuola) --- */
    .sala-immagini {
        grid-template-columns: 1fr;
    }

    .sala-immagini img {
        height: 200px;
    }

    /* --- Sezione Contatti --- */
    .contatti-container {
        flex-direction: column;
        gap: 30px;
    }

    .info-contatto {
        text-align: center;
    }
}

/* =================================
   FOOTER
   ================================= */

footer {
    text-align: center;
    padding: 20px;
    background-color: var(--colore-header-footer);
    color: var(--colore-testo-bianco);
}