:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --bg-color:#A1C4FD;
    --accent-color: #f3f4f6;
    --white: #ffffff;
    --gray: #6b7280;
    --transition: all 0.3s ease;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

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

ul {
    list-style: none;
}

nav {
    display: flex;
    justify-content: space-between;
    padding: 0 40px;
    align-items: center;
    min-height: 8vh;
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}


.nav-links {
    display: flex;
    justify-content: space-around;
    width: 30%;
}

.nav-links li a {
    font-weight: 500;
    transition: var(--transition);
}

.nav-links li a:hover, .nav-links li a.active {
    color: var(--primary-color);
}

.hero {
    height: 92vh;
    background: linear-gradient(#A1C4FD, #F6CEEC);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 10px;
}

.hero-content h1 span {
    color: var(--primary-color);
}

.hero-content h3 {
    font-size: 1.5rem;
    color: var(--gray);
    margin-bottom: 20px;
}

.hero-content p {
    max-width: 600px;
    margin: 0 auto 30px;
    font-size: 1.1rem;
}

.btn {
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    margin: 0 10px;
}

.btn.primary {
    background-color: var(--primary-color);
    color: var(--white);
}

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

.featured-skills {
    padding: 80px 0;
    background: linear-gradient(#F6CEEC,#A1C4FD);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
}

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

.skill-card {
    background-color: var(--white);
    padding: 40px;
    border-radius: 10px;
    border-left:4px solid var(--primary-color);
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
}

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

.skill-card h3 {
    margin-bottom: 15px;
}
/* hide checkbox */
#menu-toggle {
    display: none;
}

/* hamburger icon */
.menu-icon {
    display: none;
    font-size: 28px;
    cursor: pointer;
}
@media (max-width: 768px) {

    nav {
        flex-direction: row;
        padding: 15px 20px;
    }


    .menu-icon {
        display:block;
    }    
    
    
    #menu-toggle:checked + .menu-icon + .nav-links {
        display: flex;
    }
    .nav-links {
        position: absolute;
        top: 60px;
        right: 0;
        background: var(--white);
        width: 200px;
        flex-direction: column;
        text-align: center;
        display: none;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        padding: 15px 0;
    }

    .nav-links li {
        margin: 15px 0;
    }

    .hero {
        height: auto;
        padding: 60px 20px;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-content h3 {
        font-size: 1.2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .btn {
        display: block;
        margin: 10px auto;
        width: 80%;
        text-align: center;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .skill-card {
        padding: 25px;
    }
}
@media (max-width: 480px) {

    .logo {
        font-size: 20px;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

    .hero-content h3 {
        font-size: 1rem;
    }

    .hero-content p {
        font-size: 0.9rem;
    }

    .btn {
        padding: 10px;
        font-size: 0.9rem;
    }
}