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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #222;
}

.site-header {
    position: sticky;   
    top: 0;
    z-index: 100;
    background-color: #ffffff;
    border-bottom: 1px solid #ddd;
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.75rem 1rem;
    display: flex;               
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    font-weight: 700;
    font-size: 1.2rem;
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    border: 2px solid #0077b6;
}


.main-nav a {
    text-decoration: none;
    margin-left: 1rem;
    font-size: 0.95rem;
    color: #333;
}

.main-nav a:hover,
.main-nav a:focus {
    text-decoration: underline;
}


.page-grid {
    max-width: 1100px;
    margin: 1rem auto 2.5rem;
    padding: 0 1rem 0;
    display: grid;                  
    grid-template-columns: 2fr 1.5fr;
    grid-template-rows: auto auto;
    gap: 1rem;
}


.card {
    background-color: #ffffff;
    border-radius: 8px;
    padding: 1.25rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}


.about {
    display: flex;             
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-start;
}


.about-image-wrapper {
    flex: 0 0 140px;
}

.profile-img {
    width: 140px;
    height: 140px;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid #0077b6;
}


.about-text {
    flex: 1;
}

.about-text h1 {
    font-size: 1.6rem;
    margin-bottom: 0.4rem;
}

.tagline {
    font-size: 0.95rem;
    color: #555;
    margin-bottom: 0.75rem;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
}

.skills-list {
    list-style: disc;
    padding-left: 1.25rem;
}

.skills-list li + li {
    margin-top: 0.35rem;
}

.experience-item + .experience-item,
.education-item + .education-item {
    margin-top: 1rem;
}

.experience-meta,
.education-meta {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 0.35rem;
}


.contact-list {
    list-style: none;
    margin-bottom: 0.75rem;
}

.contact-list li + li {
    margin-top: 0.25rem;
}


.back-to-top {
    position: fixed;   
    right: 1rem;
    bottom: 1rem;
    text-decoration: none;
    background-color: #0077b6;
    color: #ffffff;
    padding: 0.4rem 0.7rem;
    border-radius: 50%;
    font-size: 1.1rem;
    line-height: 1;
}


.site-footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
    color: #555;
}

@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-nav {
        display: flex;
        flex-wrap: wrap;
    }

    .main-nav a {
        margin: 0.25rem 0.75rem 0.25rem 0;
    }

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

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

    .about-image-wrapper {
        flex: 0 0 auto;
    }

    .about-text {
        width: 100%;
    }

    .back-to-top {
        bottom: 0.75rem;
        right: 0.75rem;
    }
}