/* ============================================
   IMPORTAZIONE FONT E VARIABILI CSS
   ============================================ */

/* Importa i font da Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Clicker+Script&family=Poppins:wght@200;300;400;500;600;700&display=swap');

/* Variabili CSS per i colori - Tema Chiaro */
:root {
    --bg-black-900: #e9e9e9;     /* Sfondo principale chiaro */
    --bg-black-100: #f2f2f2;     /* Sfondo secondario chiaro */
    --bg-black-50: #c5c5c5;      /* Bordi e divisori */
    --bg-second: #30946e;        /* Colore principale (verde) */
    --text-black-900: #1c1c1c;   /* Testo principale scuro */
    --text-black-700: #222222;   /* Testo secondario */
}

/* Variabili CSS per i colori - Tema Scuro */
body.dark {
    --bg-black-900: #1c1c1c;     /* Sfondo principale scuro */
    --bg-black-100: #222222;     /* Sfondo secondario scuro */
    --bg-black-50: #393939;      /* Bordi e divisori scuri */
    --bg-second: #30946e;        /* Colore principale rimane uguale */
    --text-black-900: #e9e9e9;   /* Testo principale chiaro */
    --text-black-700: #f2f2f2;   /* Testo secondario chiaro */
}


/* ============================================
   RESET E STILI BASE
   ============================================ */

/* Reset universale per rimuovere margini e padding di default */
* {
    margin: 0;
    padding: 0;
    outline: none;
    text-decoration: none;
    box-sizing: border-box;
}

/* Applica box-sizing anche agli pseudo-elementi */
::before,
::after {
    box-sizing: border-box;
}

/* Stili base del body */
body {
    line-height: 1.5;
    font-size: 16px;
    font-family: 'Poppins', serif;
    overflow-x: hidden;
}

/* Reset delle liste */
ul {
    list-style: none;
}


/* ============================================
   LAYOUT PRINCIPALE E SEZIONI
   ============================================ */

/* Container principale per contenuto centrato */
.container {
    max-width: 1100px;
    width: 100%;
    margin: auto;
}

/* Sezioni principali della pagina */
.section {
    background: var(--bg-black-900);
    min-height: 100vh;
    display: block;
    padding: 0 30px;
    opacity: 1;
    position: fixed;
    left: 270px;  /* Spazio per sidebar */
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow-y: auto;
    overflow-x: hidden;
    transition: all 0.3s ease;
}

/* Sezione attiva (visibile) */
.section.active {
    z-index: 2;
    opacity: 1;
    animation: fadeIn 0.7s ease-in-out;
}

/* Sezione di background */
.section.back-section {
    z-index: 1;
}

/* Container interno delle sezioni */
.section .container {
    padding-top: 60px;
    padding-bottom: 70px;
}

/* Animazione fade in per le sezioni */
@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}


/* ============================================
   CLASSI UTILITY
   ============================================ */

/* Nasconde completamente un elemento */
.hidden {
    display: none !important;
}

/* Padding laterale standard */
.padd-15 {
    padding-left: 15px;
    padding-right: 15px;
}

/* Padding laterale ridotto */
.padd-10 {
    padding-left: 7px;
    padding-right: 7px;
}

/* Sistema di griglia flessibile */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-left: -10px;
    margin-right: -10px;
    position: relative;
    align-items: stretch;
}

/* Ombra per elementi */
.shadow-dark {
    box-shadow: 0 0 20px rgba(48, 46, 77, 0.15);
}


/* ============================================
   TITOLI E BOTTONI
   ============================================ */

/* Titoli delle sezioni */
.section-title {
    flex: 0 0 100%;
    max-width: 100%;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 40px;
    color: var(--text-black-900);
    font-weight: 700;
    position: relative;
}

/* Linee decorative sotto i titoli */
.section-title h2::before {
    content: '';
    height: 4px;
    width: 50px;
    background-color: var(--bg-second);
    position: absolute;
    top: 100%;
    left: 0;
}

.section-title h2::after {
    content: '';
    height: 4px;
    width: 25px;
    background-color: var(--bg-second);
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 8px;
}

/* Titoli secondari */
.section-title h3 {
    font-size: 30px;
    color: var(--text-black-900);
    font-weight: 700;
    position: relative;
}

/* Bottoni standard */
.btn {
    font-size: 16px;
    font-weight: 500;
    padding: 12px 35px;
    color: white;
    border-radius: 40px;
    display: inline-block;
    white-space: nowrap;
    border: none;
    background: var(--bg-second);
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn:hover {
    transform: scale(1.05);
}


/* ============================================
   SEZIONE ABOUT - INFORMAZIONI PERSONALI
   ============================================ */

.about .about-content {
    flex: 0 0 100%;
    max-width: 100%;
}

/* Testo introduttivo */
.about .about-content .about-text {
    flex: 0 0 100%;
    max-width: 100%;
}

.about .about-content .about-text h3 {
    font-size: 24px;
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--text-black-900);
}

.about .about-content .about-text h3 span {
    color: var(--bg-second);
}

.about .about-content .about-text p {
    font-size: 16px;
    line-height: 25px;
    color: var(--text-black-700);
}

/* Layout a tre colonne per info personali e skills */
.about .about-content .personal-info,
.about .about-content .skills {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
    margin-top: 40px;
    padding: 0 15px;
}

/* Container per informazioni personali */
.info-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.about .about-content .personal-info .info-item {
    flex: 0 0 auto;
    margin-bottom: 15px;
    margin-right: 20px;
}

.about .about-content .personal-info .info-item p {
    display: inline-block;
    white-space: nowrap;
    font-weight: 600;
    padding: 10px 0;
    font-size: 16px;
    color: var(--text-black-900);
    border-bottom: 1px solid var(--bg-black-50);
}

.about .about-content .personal-info .info-item p span {
    display: inline-block;
    font-weight: 400;
    color: var(--text-black-700);
    margin-left: 4px;
}

/* Bottoni nell'area info personali */
.about .about-content .personal-info .buttons {
    margin-top: 30px;
}

.about .about-content .personal-info .buttons .btn {
    margin-top: 10px;
}


/* ============================================
   SEZIONE SKILLS - COMPETENZE
   ============================================ */

.about .about-content .skills .skill-item {
    flex: 0 0 100%;
    max-width: 100%;
    margin-bottom: 25px;
}

.about .about-content .skills .skill-item h5 {
    line-height: 40px;
    font-weight: 600;
    font-size: 16px;
    color: var(--text-black-900);
    text-transform: capitalize;
}

/* Barra di progresso per le skills */
.about .about-content .skills .skill-item .progress {
    background-color: var(--bg-black-50);
    height: 7px;
    border-radius: 4px;
    width: 100%;
    position: relative;
}

.about .about-content .skills .skill-item .progress .progress-in {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    border-radius: 4px;
    background-color: var(--bg-second);
}

/* Percentuale delle skills */
.about .about-content .skills .skill-item .skill-percent {
    position: absolute;
    right: 0;
    color: var(--text-black-900);
    top: -40px;
    font-weight: 400;
    line-height: 40px;
}


/* ============================================
   TIMELINE - FORMAZIONE ED ESPERIENZA
   ============================================ */

/* Layout per formazione ed esperienza */
.about .about-content .education,
.about .about-content .experience {
    flex: 0 0 50%;
    max-width: 50%;
    margin-top: 30px;
}

.about .about-content h3.title {
    font-size: 24px;
    margin-bottom: 30px;
    font-weight: 700;
    color: var(--text-black-900);
}

/* Container della timeline */
.about .about-content .timeline-box {
    flex: 0 0 100%;
    max-width: 100%;
}

.about .about-content .timeline {
    background-color: var(--bg-black-100);
    padding: 30px 15px;
    border: 1px solid var(--bg-black-50);
    border-radius: 10px;
    width: 100%;
    position: relative;
}

/* Elementi della timeline */
.about .about-content .timeline .timeline-item {
    position: relative;
    padding-left: 37px;
    padding-bottom: 50px;
}

.about .about-content .timeline .timeline-item:last-child {
    padding-bottom: 0;
}

/* Linea verticale della timeline */
.about .about-content .timeline .timeline-item::before {
    content: '';
    width: 1px;
    position: absolute;
    height: 100%;
    left: 7px;
    top: 0;
    background-color: var(--bg-second);
}

/* Punto circolare della timeline */
.about .about-content .timeline .circle-dot {
    position: absolute;
    left: 0;
    top: 0;
    height: 15px;
    width: 15px;
    border-radius: 50%;
    background-color: var(--bg-second);
}

/* Contenuto degli elementi della timeline */
.about .about-content .timeline .timeline-date {
    font-weight: 400;
    font-size: 14px;
    margin-bottom: 12px;
    color: var(--text-black-700);
}

.about .about-content .timeline .timeline-date .fa {
    margin-right: 5px;
}

.about .about-content .timeline .timeline-title {
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 15px;
    text-transform: capitalize;
    color: var(--text-black-900);
}

.about .about-content .timeline .timeline-text {
    line-height: 25px;
    font-size: 16px;
    text-align: justify;
    color: var(--text-black-700);
}


/* ============================================
   TIMELINE PUBBLICAZIONI
   ============================================ */

.src_timeline-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

.src_timeline {
    position: relative;
    padding: 20px 0;
}

/* Linea verticale principale della timeline pubblicazioni */
.src_timeline::before {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--bg-second);
    top: 30px;
    bottom: 30px;
    left: 75px;
    margin-left: -2px;
}

/* Elementi della timeline pubblicazioni */
.src_timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    position: relative;
}

/* Immagini delle pubblicazioni */
.src_timeline-img {
    width: 150px;
    height: 210px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    margin-right: 30px;
    transition: transform 0.3s ease;
    z-index: 2;
}

.src_timeline-img:hover {
    transform: scale(1.1);
    z-index: 3;
}

/* Contenuto delle pubblicazioni */
.src_timeline-content {
    padding: 20px;
    border-radius: 0px;
    flex: 1;
}

.src_timeline-date {
    color: var(--bg-second);
    font-weight: bold;
    font-size: 0.9em;
    margin-bottom: 10px;
}

.src_timeline-title {
    font-size: 1.2em;
    margin-bottom: 10px;
    color: var(--text-black-900);
}

.src_timeline-authors {
    font-style: italic;
    color: var(--text-black-700);
    margin-bottom: 10px;
}

.src_timeline-journal {
    font-size: 0.9em;
    color: var(--text-black-700);
}

/* Link esterni */
.external-link {
    color: var(--text-black-900);
    font-weight: bold;
    text-decoration: none;
}


/* ============================================
   BOTTONI DELLE PUBBLICAZIONI
   ============================================ */

.publication-buttons {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}

/* Stile base dei bottoni pubblicazioni */
.pub-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border: none;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: white;
}

/* Bottone Abstract */
.abstract-btn {
    background: var(--bg-second);
}

.abstract-btn:hover {
    background: #2a7a5e;
    transform: translateY(-2px);
}

.abstract-btn.active {
    background: #2a7a5e;
}

/* Bottone ArXiv */
.arxiv-btn {
    background: #b31b1b;
}

.arxiv-btn:hover {
    background: #a01818;
    transform: translateY(-2px);
}

/* Bottone Publisher */
.publisher-btn {
    background: #4a5568;
}

.publisher-btn:hover {
    background: #2d3748;
    transform: translateY(-2px);
}

/* Bottone GitHub */
.github-btn {
    background: #24292e;
}

.github-btn:hover {
    background: #1b1f23;
    transform: translateY(-2px);
}

/* Icona ArXiv personalizzata */
.arxiv-icon {
    width: 16px;
    height: 16px;
    background: white;
    color: #b31b1b;
    border-radius: 3px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 10px;
}


/* ============================================
   ABSTRACT ESPANDIBILE
   ============================================ */

.abstract-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background: var(--bg-black-100);
    border-radius: 8px;
    margin-top: 15px;
}

.abstract-content.expanded {
    max-height: 500px;
}

.abstract-text {
    padding: 20px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-black-700);
    text-align: justify;
}

/* Animazione freccia del bottone abstract */
.abstract-btn .fa-chevron-down {
    transition: transform 0.3s ease;
}

.abstract-btn.active .fa-chevron-down {
    transform: rotate(180deg);
}


/* ============================================
   MEDIA QUERIES - RESPONSIVE DESIGN
   ============================================ */

/* Desktop large (max-width: 1199px) */
@media (max-width: 1199px) {
    .section .container {
        padding-top: 70px;
    }
    
    .section {
        left: 0;
        width: 100%;
    }
    
    .section.open {
        left: 270px;
    }
    
    .about .about-content .personal-info .info-item p span {
        display: block;
        margin-left: 0;
    }
    
    .aside.open + .main-content .section {
        left: 270px;
    }
}

/* Tablet (max-width: 991px) */
@media (max-width: 991px) {
    .contact .contact-info-item,
    .portfolio .portfolio-item,
    .service .service-item,
    .src_timeline-title {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

/* Mobile (max-width: 767px) */
@media (max-width: 767px) {
    .contact .contact-form .col-6,
    .contact .contact-info-item,
    .portfolio .portfolio-item,
    .service .service-item,
    .about .about-content .experience,
    .about .about-content .education,
    .about .about-content .skills,
    .about .about-content .personal-info,
    .src_timeline-title {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .publication-buttons {
        justify-content: center;
    }
}