:root {
    --primary-color: #0e2431;
    --accent-color: #007bff;
    --text-color: #333;
    --secondary-text-color: #f0f8ff;
    --background-light: #ffffff;
    --hover-color: #00509e;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--background-light);
    color: var(--text-color);
    transition: margin-left 0.4s ease;
}


.navbar {
    position: fixed;
    top: 0;
    left: -250px;
    width: 250px;
    height: 100%;
    background-color: var(--primary-color);
    color: var(--secondary-text-color);
    padding: 30px 15px;
    display: flex;
    flex-direction: column;
    transition: left 0.4s ease;
    z-index: 1001;
}

.navbar.active {
    left: 0;
}

.navbar .left {
    color: var(--secondary-text-color);
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 40px;
    padding-left: 10px;
}

.nav-links {
    list-style: none;
}

.nav-links li a {
    text-decoration: none;
    color: var(--secondary-text-color);
    font-size: 1.1rem;
    padding: 12px 10px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s;
}

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


.menu-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    font-size: 28px;
    color: var(--primary-color);
    background-color: var(--background-light);
    border-radius: 6px;
    padding: 8px 10px;
    cursor: pointer;
    z-index: 1002;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: opacity 0.3s, visibility 0.3s;
}

.menu-toggle.hide {
    opacity: 0;
    visibility: hidden;
}


body.sidebar-open {
    margin-left: 250px;
}

main {
    padding: 0; 
}

main section:not(.firstSection) {
    padding: 60px 20px;
    max-width: 960px;
    margin: 0 auto;
}

hr {
    border: 0;
    background: #e0e0e0;
    height: 1px;
    margin: 60px auto;
    width: 80%;
}

.firstSection {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
    color: var(--secondary-text-color);


    background-image: linear-gradient(rgba(14, 36, 49, 0.7), rgba(14, 36, 49, 0.7)), url('../image/hero.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.leftSection {
    font-size: 2.5rem;
    font-weight: 600;
}

.leftSection .Blue,
.leftSection #element {
    color: var(--accent-color);
    font-weight: 700;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 40px;
    font-weight: 700;
}

#about p, #skills li, #projects li, #education p, #contact p {
    font-size: 1.1rem;
    line-height: 1.7;
    text-align: left;
    margin-bottom: 1rem;
}

#skills ul, #projects ul {
    list-style: none;
    padding: 0;
}

#projects li strong {
    color: var(--primary-color);
}

#contact a, #education a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}

#contact a:hover {
    text-decoration: underline;
}


#scrollToTopBtn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 10px 15px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    border: none;
    display: none;
    z-index: 999;
    cursor: pointer;
    font-size: 1.2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}


footer {
    text-align: center;
    padding: 25px;
    background: var(--primary-color);
    color: var(--secondary-text-color);
}

footer .social-icons {
    margin-top: 15px;
}

footer .social-icons a {
    color: var(--secondary-text-color);
    margin: 0 12px;
    font-size: 1.5rem;
    transition: color 0.3s ease, transform 0.3s ease;
    display: inline-block;
}

footer .social-icons a:hover {
    color: var(--accent-color);
    transform: translateY(-3px);
}



@media (max-width: 768px) {
    body.sidebar-open {
        margin-left: 0;
    }

    main section:not(.firstSection) {
        padding: 60px 15px;
    }

    .leftSection {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}

@media (min-width: 769px) {
    .firstSection {
        background-image: linear-gradient(rgba(14, 36, 49, 0.7), rgba(14, 36, 49, 0.7)), url('../image/hero01.JPG');

        
        background-attachment: fixed;
    }
}