Wprowadzenie do modułów LED w reklamie

h3 {color: #2C3E50;} h1 {font-size: 2rem; margin-bottom: 20px;} h2 {font-size: 1.6rem; margin-top: 30px;} h3 {font-size: 1.4rem; margin-top: 25px;} p{margin-bottom: 15px;} ul {margin-bottom: 20px;} li {margin-bottom: 10px;} .highlight {background-color: #F2F8FE; padding: 10px; border-left: 4px solid #3498DB; margin: 15px 0;} .conclusion {background-color: #fcfcfc; padding: 15px; border: 1px solid #e2e2e2; border-radius: 5px;}