:root{--primary-blue:#007bbd;--bg-gray:#f8fafc;--card-shadow:0 4px 12px rgba(0,0,0,0.08);--success:#10b981;--danger:#ef4444}body{background-color:var(--bg-gray);font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif}.planner-card{background:#fff;border-radius:12px;box-shadow:var(--card-shadow);padding:2rem;height:100%;border:1px solid #e2e8f0}.formula-box{background-color:#f1f5f9;border-radius:8px;padding:1.5rem;margin-bottom:1.5rem}.formula-text{font-family:'Courier New',Courier,monospace;font-weight:600;color:#334155}.btn-create{background-color:var(--primary-blue);color:#fff;border:none;padding:12px 20px;border-radius:6px;font-weight:600;width:100%;transition:all .3s}.btn-create:hover{background-color:#005f91;transform:translateY(-1px)}.subject-row{background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:10px;margin-bottom:10px}.remove-btn{color:#94a3b8;cursor:pointer;font-size:1.2rem}.remove-btn:hover{color:#ef4444}.stat-card{padding:.8rem;border-radius:10px;text-align:center;background:#f8fafc;border:1px solid #e2e8f0;height:100%}.stat-value{font-size:1.25rem;font-weight:800;display:block;color:var(--primary-blue)}.stat-label{font-size:.65rem;text-transform:uppercase;font-weight:700;color:#64748b}.chart-container{position:relative;margin:20px auto;height:220px;width:100%}.schedule-table{font-size:.85rem;margin-top:1.5rem;border-radius:8px;overflow:hidden}.schedule-table thead{background-color:#f1f5f9;color:#475569}.priority-dot{height:8px;width:8px;border-radius:50%;display:inline-block;margin-right:5px}.p-3{background-color:#ef4444}.p-2{background-color:#f59e0b}.p-1{background-color:#10b981}