.page-header{background-color:var(--kw-light-bg);padding:3.5rem 0;border-bottom:1px solid #e9ecef}.guide-card{transition:transform 0.2s ease, box-shadow 0.2s ease;border:1px solid #e9ecef;background-color:#ffffff}.guide-card:hover{transform:translateY(-4px);box-shadow:0 0.75rem 1.5rem rgba(0,0,0,0.08) !important}.pdf-cover-placeholder{height:200px;background:linear-gradient(135deg, #212529 0%, #343a40 100%);border-top-left-radius:calc(0.5rem - 1px);border-top-right-radius:calc(0.5rem - 1px);display:flex;flex-column:column;align-items:center;justify-content:center;position:relative}.whatsapp-btn{background-color:#25D366;color:white;font-weight:600;border:none;transition:background-color 0.2s ease}.whatsapp-btn:hover{background-color:#1DA851;color:white}