:root {
    /* Colori base: Chiara, luminosa, pulita */
    --bg-main: #FAFAFB;      /* Grigio-bianco molto luminoso */
    --bg-alt: #FFFFFF;       /* Bianco puro per le sezioni alternate */
    
    /* Colori testo: Scuro, leggibile ma non nero puro (\#000) */
    --text-primary: #1F2937; /* Slate scuro, ottima leggibilità */
    --text-secondary: #4B5563; /* Slate medio per sottotitoli o descrizioni */
    
    /* Accenti e interazioni: Blu professionale, affidabile, giovane */
    --accent-blue: #2563EB; /* Blu royal acceso ma serio */
    --accent-blue-dark: #1D4ED8; /* Hover */
    --accent-light: #EFF6FF; /* Sfondo leggerissimo blu per pills o highlight */
    
    /* Layout costants */
    --container-max-width: 900px;
    --section-padding: 100px 20px;
    
    /* Tipografia */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Tipologia Testi Globale */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

h3 {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

p:last-child {
    margin-bottom: 0;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

strong, b {
    font-weight: 600;
    color: var(--text-primary);
}

/* Utility Classi / Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    width: 100%;
}

.section {
    padding: var(--section-padding);
    background-color: var(--bg-main);
}

.section-alt {
    padding: var(--section-padding);
    background-color: var(--bg-alt);
}

.section-header {
    margin-bottom: 4rem;
}

.divider {
    width: 40px;
    height: 3px;
    background-color: var(--accent-blue);
    margin-top: 1rem;
    border-radius: 2px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1rem 20px;
    transition: all var(--transition-speed);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--accent-blue);
    letter-spacing: -0.02em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links li a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links li a:hover {
    color: var(--accent-blue);
}

.nav-cta {
    background-color: var(--accent-light);
    color: var(--accent-blue) !important;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600 !important;
}

.nav-cta:hover {
    background-color: var(--accent-blue);
    color: #fff !important;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
}

/* Pulsanti */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: #fff;
    border: 1px solid var(--accent-blue);
}

.btn-primary:hover {
    background-color: var(--accent-blue-dark);
    border-color: var(--accent-blue-dark);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid #D1D5DB;
}

.btn-outline:hover {
    border-color: var(--text-primary);
    background-color: var(--bg-alt);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    padding-bottom: 100px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.hero-role {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--accent-blue);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.hero-intro {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Custom Abstract Visual Hero in CSS */
.hero-visual {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.abstract-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    z-index: -1;
    opacity: 0.6;
    animation: float 10s infinite ease-in-out alternate;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: #93C5FD; /* Azzurro chiaro */
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 250px;
    height: 250px;
    background: #BFDBFE;
    bottom: 20%;
    right: 5%;
    animation-delay: -3s;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: #60A5FA;
    top: 40%;
    right: 40%;
    animation-delay: -6s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(20px, -30px) scale(1.1); }
}

/* About / Oltre il lavoro Content */
.about-content p {
    font-size: 1.05rem;
}

/* Timeline (Esperienze e Formazione) */
.timeline {
    position: relative;
    border-left: 2px solid var(--accent-light);
    padding-left: 2rem;
    margin-left: 10px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    left: calc(-2rem - 9px); /* center on the 2px border */
    top: 0.35rem;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px var(--accent-light);
}

.timeline-header {
    margin-bottom: 0.5rem;
}

.timeline-header h3 {
    margin-bottom: 0.25rem;
}

.timeline-date {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-blue);
    background-color: var(--accent-light);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.timeline-subtitle {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.skill-category {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid #E5E7EB;
    padding-bottom: 0.5rem;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.skill-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    width: 16px;
    height: 16px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232563EB' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
}

.mt-4 {
    margin-top: 2rem;
}

.tools-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.pill-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-right: 0.5rem;
}

.pill {
    background-color: #F3F4F6;
    color: var(--text-secondary);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

.pill.outline {
    background-color: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
}

.pill:hover:not(.outline) {
    background-color: #E5E7EB;
}

/* Contact */
.contact-container {
    max-width: 600px;
}

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

.contact-subtitle {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 20px;
    background-color: #111827; /* Molto scuro */
    color: #9CA3AF;
    font-size: 0.85rem;
}

/* --- Utilities Animazioni --- */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive Media Queries --- */
@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }

    .hero-visual {
        order: -1;
        width: 250px;
        margin: 0 auto;
    }

    .hero-visual .abstract-shape {
        filter: blur(40px);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.98);
        padding: 2rem;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }

    .btn {
        width: 100%;
    }
}