:root {
    /* Colori Modalità Giorno */
    --background-light: #F0F4F8;
    --card-background-light: #FFFFFF;
    --text-color-light: #1A202C;
    --search-bar-light: #E2E8F0;
    --blue-accent-light: #364C86;

    /* Colori Modalità Notte */
    --background-dark: #1A202C;
    --card-background-dark: #2D3748;
    --text-color-dark: #E2E8F0;
    --search-bar-dark: #4A5568;
    --blue-accent-dark: #4299E1;

    /* Variabili comuni */
    --border-radius: 15px;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text-color-light);
    background-color: var(--background-light);
    transition: background-color 0.5s, color 0.5s;
    line-height: 1.6;
}

/* Modalità Notte */
body.dark-mode {
    color: var(--text-color-dark);
    background-color: var(--background-dark);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2.5rem 4vw;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.header-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin: 0;
    font-weight: 700;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-bar {
    width: clamp(150px, 30vw, 300px);
    padding: 10px 15px;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--search-bar-light);
    color: var(--text-color-light);
    font-size: 1rem;
    transition: var(--transition);
}

body.dark-mode .search-bar {
    background-color: var(--search-bar-dark);
    color: var(--text-color-dark);
}

.search-bar::placeholder {
    color: rgba(0, 0, 0, 0.5);
}

body.dark-mode .search-bar::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--blue-accent-light);
    transition: var(--transition);
}

body.dark-mode .theme-toggle {
    color: var(--blue-accent-dark);
}

.main-content {
    padding: 2rem 4vw;
}

.gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    justify-content: center;
}

.gallery-card {
    position: relative;
    width: 100%;
    height: 350px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    cursor: pointer;
    transform: scale(1);
    transition: transform 0.4s ease-in-out, box-shadow 0.4s ease-in-out;
}

.gallery-card:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.card-background {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.7);
    transition: filter 0.4s ease-in-out;
}

.gallery-card:hover .card-background {
    filter: brightness(0.9);
}

.card-info {
    position: absolute;
    bottom: 20px;
    left: 20px;
    color: white;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);
}

.card-title {
    margin: 0 0 5px 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.card-details {
    margin: 0;
    font-size: 1rem;
    font-weight: 400;
}

.no-results {
    font-size: 1.5rem;
    color: #718096;
    text-align: center;
    width: 100%;
    padding: 2rem;
}

/* Stile per la nuova griglia di foto */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding-top: 2rem;
}

.photo-grid-item {
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.photo-grid-item:hover {
    transform: scale(1.05);
}

.photo-grid-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius);
}

/* Stile per il pulsante Torna indietro */
.back-button {
    background-color: var(--blue-accent-light);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    padding: 1rem 1.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: var(--box-shadow);
}

.back-button:hover {
    background-color: #2a3c6b;
    transform: translateY(-2px);
}

body.dark-mode .back-button {
    background-color: var(--blue-accent-dark);
}

body.dark-mode .back-button:hover {
    background-color: #3b8ac4;
}

/* Modal e Navigazione */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: transparent;
    border-radius: var(--border-radius);
}

.modal-image {
    max-width: 660px; /* Riduce la larghezza massima per lasciare spazio alla cornice */
    max-height: 55%; /* Riduce l'altezza massima per lasciare spazio alla cornice */
    border-radius: var(--border-radius);
    object-fit: contain;
    transition: opacity 0.3s ease-in-out;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: #f1f1f1;
    font-size: 2.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    z-index: 1002;
}

.modal-close:hover,
.modal-close:focus {
    color: #bbb;
}

.modal-nav {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    color: #f1f1f1;
    font-size: 3rem;
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
    z-index: 1001;
}

.prev-btn {
    left: 4vw;
}

.next-btn {
    right: 4vw;
}

.modal-nav:hover {
    color: #bbb;
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .header-title {
        font-size: 1.8rem;
    }

    .header-right {
        width: 100%;
        justify-content: center;
    }
    
    .search-bar {
        width: 100%;
        padding: 10px 15px;
    }

    .modal-nav {
        font-size: 2rem;
    }
    .modal-image {
        max-width: 90%;
        max-height: 90%;
    }
    .modal-close {
        top: 10px;
        right: 15px;
    }
}