:root {
    --text: #1a1a1a;
    --accent: #008080;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    color: var(--text);
    background: #fff;
    line-height: 1.6;
}

/* NAVIGATION */
.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.nav-logo { height: 45px !important; width: auto; }

.nav-links a {
    margin-left: 20px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
}

/* LAYOUT WRAPPER */
.about-wrapper {
    max-width: 1200px;
    margin: 60px auto;
    padding: 0 5%;
    display: grid;
    /* Sidebar 40%, Text 60% */
    grid-template-columns: 0.8fr 1.2fr;
    gap: 80px;
    align-items: start;
}

.about-header {
    grid-column: 1 / -1;
    text-align: center;
    margin-bottom: 50px;
}

.about-header h1 { font-size: 3.5rem; font-weight: 900; margin: 0; }

.heading-underline {
    width: 80px;
    height: 8px;
    background: var(--text);
    margin: 20px auto;
}

/* SIDEBAR & PHOTO */
.credentials-sidebar {
    background: #f9f9f9;
    border-top: 6px solid var(--text);
    box-shadow: 0 15px 40px rgba(0,0,0,0.05);
}

.bio-photo {
    width: 100%;
    display: block;
    /* High-contrast Black & White filter */
    filter: grayscale(100%) contrast(125%) brightness(90%);
    border-bottom: 5px solid var(--accent);
}

.sidebar-content { padding: 40px; }

.sidebar-content h3 {
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 2px;
    margin: 0 0 20px 0;
}

.sidebar-content ul { list-style: none; padding: 0; margin: 0; }

.sidebar-content li {
    padding: 12px 0;
    border-bottom: 1px solid #ddd;
    font-weight: 600;
    font-size: 1rem;
}

/* TEXT CONTENT */
.lead-in {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 30px;
    line-height: 1.3;
}

.bio-text p { font-size: 1.15rem; margin-bottom: 25px; color: #333; }

/* FOOTER */
.global-footer { text-align: center; padding: 80px 0; color: #888; font-size: 14px; }

/* MOBILE RESPONSIVE */
@media (max-width: 1024px) {
    .about-wrapper { grid-template-columns: 1fr; }
    .about-header h1 { font-size: 2.5rem; }
}