:root {
    --primary-color: #0DF205;
    --secondary-color: #00A3FF;
    --background-dark: #121212;
    --background-light: #1E1E1E;
    --text-primary: #EAEAEA;
    --text-secondary: #B0B0B0;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Fira Code', monospace;
    background-color: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.7;
}

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

.main-header {
    background: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.main-nav {
    display: flex;
}

.main-nav ul {
    list-style: none;
    display: flex;
}

.main-nav li {
    margin-left: 2rem;
}

.main-nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 400;
    position: relative;
    transition: color 0.3s ease;
    padding: 0.5rem;
}

.main-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--secondary-color);
    transition: width 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--secondary-color);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.lang-switcher {
    display: flex;
    align-items: center;
    margin-left: 2rem;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--glass-bg);
}

.lang-switcher button {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 0.8rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.lang-switcher button:hover {
    background-color: var(--glass-border);
    color: var(--text-primary);
}

.lang-switcher button.active {
    background-color: var(--secondary-color);
    color: var(--background-dark);
    box-shadow: 0 0 10px var(--secondary-color);
}

@media (max-width: 768px) {
    .lang-switcher {
        margin-left: 0;
        margin-top: 1rem;
        border: 1px solid var(--secondary-color);
    }
    .main-nav.active .lang-switcher {
        margin-top: 2rem;
    }
}
.hamburger-menu {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

.profile-pic {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--primary-color);
    margin-bottom: 1.5rem;
    object-fit: cover;
}

.section-container {
    padding: 6rem 0;
    border-bottom: 1px solid var(--glass-border);
}

#about .container {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--text-secondary);
    max-width: 70ch;
}

#about .section-title {
    color: var(--primary-color);
}

.grid-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.tech-stack {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    backdrop-filter: blur(5px);
}

.tech-stack h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.tech-stack .icons {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    font-size: 3.5rem;
}

.tech-stack .icons i {
    transition: color 0.1s ease, transform 0.1s ease;
}

.tech-stack .icons i:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

.contact-links {
    list-style: none;
    padding: 0;
    margin-top: 3rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.contact-links a {
    display: inline-flex;
    align-items: center;
    padding: 0.8rem 1.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.1rem;
    transition: background-color 0.3s, border-color 0.3s, transform 0.3s;
}

.contact-links a:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-3px);
    color: var(--background-dark);
}

.contact-links a span {
    margin-right: 0.8rem;
}

.contact-links a i {
    font-size: 1.2rem;
}

#scrollToTopBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    font-size: 18px;
    border: none;
    outline: none;
    background-color: var(--primary-color);
    color: var(--background-dark);
    cursor: pointer;
    padding: 15px;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    text-align: center;
    line-height: 20px;
}

#scrollToTopBtn:hover {
    background-color: var(--secondary-color);
}

@media (max-width: 992px) {
    .grid-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .section-container {
        padding: 4rem 0;
    }
}

@media (max-width: 768px) {
    body {
        overflow-x: hidden;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        height: 100vh;
        background: var(--background-light);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out, visibility 0.3s ease-in-out;
        visibility: hidden;
    }

    .main-nav.active {
        transform: translateX(0);
        visibility: visible;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .main-nav li {
        margin-left: 0;
    }

    .main-nav a {
        font-size: 1.5rem;
    }

    .hamburger-menu {
        display: block;
        z-index: 1001;
    }

    .section-title {
        font-size: 2.2rem;
    }

    .section-subtitle {
        font-size: 1.1rem;
    }
}