:root{--primary-color: #0277bd;--secondary-color: #d32f2f;--bg-color: #f8f8f8}body{background-color:var(--bg-color)}header h1 a{color:var(--primary-color);text-decoration:none}header h1 a:hover{text-decoration:underline}.post-card{transition:box-shadow .3s ease}.post-card:hover{box-shadow:0 4px 8px #0000001a}