:root{--bg-color: #ffffff;--text-color: #333333;--nav-bg: #f8f9fa;--brand-blue: #038fcd;--card-bg: #ffffff;--heading-color: #038fcd}.dark-theme{--bg-color: #121212;--text-color: #e0e0e0;--nav-bg: #1f1f1f;--brand-blue: #4dabf7;--card-bg: #1e1e1e;--heading-color: #4dabf7}body{background-color:var(--bg-color);color:var(--text-color);transition:background-color .3s ease,color .3s ease;margin:0;font-family:sans-serif}h1,h2,h3{color:var(--heading-color);transition:color .3s ease}p{color:var(--text-color)}.member-card,.contact-card,.page-section{background-color:var(--card-bg);color:var(--text-color);transition:all .3s ease}