done added introduction to business management course playlist

Introduction to Business Management/app.css

@@ -0,0 +1,109 @@
+:root{
+    --hue-neutral:200;
+    --hue-wrong:0;
+    --hue-correct:145;
+}
+
+body{
+    --hue: var(--hue-neutral);
+    padding: 0;
+    margin: 0;
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    background-image:linear-gradient(45deg, #3498db, #2ecc71);
+
+    height: 100vh;
+    width: 100vw;
+}
+
+body.correct{
+    --hue: var(--hue-correct);
+}
+
+body.wrong{
+    --hue: var(--hue-wrong);
+}
+
+.container{
+    width: 800px;
+    max-width: 80%;
+    background-color: aliceblue;
+    border-radius: 5px;
+    padding: 10px;
+    box-shadow: 0 0 10px 2px;
+    margin-bottom: 20px;
+}
+
+.btn-grid {
+    display: grid;
+    grid-template-columns: repeat(2, auto);
+    gap: 10px;
+    margin: 20px 0;
+}
+
+.btn{
+    --hue: var(--hue-neutral);
+    border: 1px solid hsl(var(--hue), 100%, 30%);
+    background-color: rgba(6, 109, 109, 0.571);
+    border-radius: 5px;
+    padding: 5px 10px;
+    color: whitesmoke;
+    outline: none;
+    cursor: pointer;
+}
+
+.btn.correct {
+    background-color: hsl(var(--hue-correct), 100%, 30%);
+}
+
+.btn.wrong {
+    background-color: hsl(var(--hue-wrong), 100%, 30%);
+}
+
+.btn:hover{
+    border-color: black;
+    opacity: 2;
+}
+
+.start-btn,
+.next-btn{
+    font-size: 1.5rem;
+    font-weight: bold;
+    padding: 10px 20px;
+    cursor: pointer;
+}
+
+.controls{
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
+.hide{
+    display: none;
+}
+ .score-container {
+   --hue :var(--hue-neutral);
+} 
+
+.score {
+    font-size: 1.5rem;
+    font-weight: bold;
+    text-align: center;
+    padding: 10px;
+    border-radius: 5px;
+    background-color: aliceblue;
+    box-shadow: 0 0 10px 2px;
+}
+
+.score.correct {
+    color: hsl(var(--hue-correct), 100%, 30%);
+
+}
+
+.score.wrong {
+    color: hsl(var(--hue-wrong), 100%, 30%);
+
+}