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

:root {
    --bg-color: #ffffff;
    --text-color: #333333;

    --primary-color: #0a2647;
    --secondary-color: #4f9cf7;

    --card-bg: #f8f9fa;
    --footer-bg: #051a2f;

    --hero-gradient-start: #0a2647;
    --hero-gradient-end: #1b3b6f;

    --border-color: #e0e0e0;

    --nav-bg: #ffffff;
    --nav-text: #0a2647;
    --nav-accent: #1c6fd6;
    --nav-control-bg: rgba(10, 38, 71, 0.08);
    --nav-control-hover: rgba(10, 38, 71, 0.16);
    --nav-shadow: 0 2px 12px rgba(10, 38, 71, 0.08);
}

.dark-theme {
    --bg-color: #0f1419;
    --text-color: #d1d5db;

    --primary-color: #111827;
    --secondary-color: #60a5fa;

    --card-bg: #161b22;
    --footer-bg: #020617;

    --hero-gradient-start: #020617;
    --hero-gradient-end: #0b1e3a;

    --border-color: #1f2933;

    --nav-bg: #111827;
    --nav-text: #e5e7eb;
    --nav-accent: #60a5fa;
    --nav-control-bg: rgba(255, 255, 255, 0.1);
    --nav-control-hover: rgba(255, 255, 255, 0.18);
    --nav-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
}

.dark-theme body {
    color: #d1d5db;
}

.dark-theme h1,
.dark-theme h2,
.dark-theme h3,
.dark-theme h4 {
    color: #e5e7eb;
}

.dark-theme .section-title {
    color: #e5e7eb;
}

.dark-theme .card h3,
.dark-theme .skill-item h3,
.dark-theme .dettaglio-item h3 {
    color: #f3f4f6;
}

.dark-theme p,
.dark-theme li {
    color: #cbd5e1;
}

.dark-theme .feature h4 {
    color: #f1f5f9;
}

.dark-theme .card-icon,
.dark-theme .feature-icon,
.dark-theme .skill-icon {
    color: var(--secondary-color);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.navbar {
    background-color: var(--nav-bg);
    color: var(--nav-text);
    box-shadow: var(--nav-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0.8rem 0;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo a {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-dark,
.dark-theme .logo-light {
    display: none;
}

.dark-theme .logo-dark {
    display: block;
}

.nav-menu ul {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    font-weight: 500;
    color: var(--nav-text);
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--nav-accent);
}

.lang-switch {
    font-weight: 600;
    gap: 5px;
}

.flag {
    display: block;
    width: 21px;
    height: 14px;
    object-fit: cover;
    border-radius: 3px;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
}

.dark-theme .flag {
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.theme-switch,
.lang-switch {
    height: 36px;
    flex-shrink: 0;
    white-space: nowrap;

    display: flex;
    align-items: center;
    justify-content: center;

    color: var(--nav-text);
    border-radius: 20px;
    background-color: var(--nav-control-bg);

    cursor: pointer;
    transition: background-color 0.3s;
}

.theme-switch {
    width: 40px;
}

.lang-switch {
    width: 78px;
}

.theme-switch:hover,
.lang-switch:hover {
    background-color: var(--nav-control-hover);
}

.theme-switch i {
    font-size: 1.2rem;
}

.hamburger {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
}

.hero {
    background: linear-gradient(135deg, var(--hero-gradient-start) 0%, var(--hero-gradient-end) 100%);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: #fff;
}

.btn-primary:hover {
    filter: brightness(0.8);
    background-color: var(--secondary-color);
}

.btn-secondary {
    background-color: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-secondary:hover {
    background-color: #fff;
    color: var(--primary-color);
}

section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.card {
    background: var(--card-bg);
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-10px);
}

.card-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.card p {
    color: var(--text-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.feature {
    text-align: center;
    padding: 20px;
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.feature h4 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.skill-item {
    text-align: center;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.skill-item:hover {
    transform: translateY(-5px);
}

.skill-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.skill-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
}

.skill-item p {
    font-size: 0.95rem;
    color: var(--text-color);
}

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

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.dettagli-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.dettaglio-item {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--secondary-color);
}

.dettaglio-item h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.dettaglio-item h3 i {
    color: var(--secondary-color);
    margin-right: 10px;
}

.dettaglio-item ul li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-color);
}

.dettaglio-item ul li::before {
    content: "▹";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

.contatti {
    background: var(--primary-color);
    color: #fff;
    text-align: center;
}

.contatti h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contatti p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.contact-info {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-info p i {
    margin-right: 8px;
    color: var(--secondary-color);
}

.footer {
    background: var(--footer-bg);
    color: #ccc;
    padding: 30px 0;
    text-align: center;
    font-size: 0.95rem;
}

.footer p {
    margin: 5px 0;
}

@media (max-width: 900px) {
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1100px) {
    .nav-menu ul {
        gap: 1.5rem;
    }
}

@media (max-width: 900px) {
    .nav-container {
        justify-content: space-between;
    }

    .lang-switch {
        margin-left: 0;
        order: 2;
    }

    .theme-switch {
        order: 3;
    }

    .nav-actions {
        margin-left: auto;
        margin-right: 16px;
    }

    .hamburger {
        display: block;
        order: 4;
    }

    .nav-menu {
        order: 5;
        width: 100%;
        display: none;
        background-color: var(--nav-bg);
        padding: 1rem 0;
        text-align: center;
        box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        display: block;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .cards,
    .features-grid,
    .dettagli-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .contact-info {
        flex-direction: column;
        gap: 1rem;
    }
}