.skali-container {font-family: 'Segoe UI', Tahoma;background-color:#f0f8ff;padding:20px;border-radius:15px;}
.header-img {width:100%;border-radius:8px;margin-bottom:15px;}
.lesson-title {font-size:1.4em;color:#007bff;margin-bottom:15px;font-weight:bold;}
.flashcards {display:flex;gap:10px;margin-bottom:20px;}
.card {background-color:#fff;border-radius:8px;padding:10px;box-shadow:0 3px 6px rgba(0,0,0,0.2);cursor:pointer;position:relative;}
.card .answer {display:none;position:absolute;bottom:-30px;left:0;background-color:#ffeb3b;padding:5px;border-radius:4px;}
.quiz-section {margin-bottom:20px;}
button.option, .next-question, .save-notes, .reset-progress {padding:8px 15px;margin-top:10px;border:none;border-radius:6px;cursor:pointer;}
button.option {background-color:#e1bee7;margin-right:5px;}
button.correct {background-color:#c8e6c9;}
button.next-question {background-color:#4fc3f7;color:#fff;}
.score-board {margin-top:15px;font-size:1.1em;font-weight:bold;}
textarea {width:100%;height:80px;margin-top:10px;padding:8px;border-radius:6px;}
.save-notes {background-color:#aed581;}
.reset-progress {background-color:#ff8a80;}