body {
  background: #111;
  color: #fff;
  font-family: 'Fira Code', 'Source Code Pro', monospace;
  margin: 0;
  min-height: 100vh;
}
#app {
  max-width: 50%;
  margin: 0px auto;
  padding: 0px;
}
header {
  position: sticky;
  top: 0;
  background: #111;
  padding: 16px 0;
  padding-top: 8%;
  margin-bottom: 20px;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.heading {
  flex: 1;
}
#tasklist-name {
  margin: 0 0 8px 0;
  font-size: 1.6em;
  color: #39ff14;
  letter-spacing: 1px;
}
.top-right {
  margin-left: 16px;
}
.top-right button {
  background: #39ff14;
  color: #111;
  border: none;
  border-radius: 6px;
  font-size: 0.75em;
  font-family: inherit;
  padding: 8px 16px;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.2s;
}
.top-right button:hover {
  background: #2ecc40;
}
.progress-wrapper {
  
  margin-top: 1em;
  display: flex;
  align-items: center;
  gap: 12px;
}
#progress-container {
  flex: 1;
  height: 12px;
  background: #222;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 16px;
}
#progress-text {
  color: #39ff14;
  font-weight: bold;
  font-size: 0.9em;
  min-width: 40px;
  text-align: right;
}
#progress-bar {
  height: 100%;
  width: 0%;
  background: #39ff14;
  transition: width 0.3s;
}
ol#task-list {
  list-style: decimal inside;
  padding: 0;
  margin: 0;
}
.task-item {
  font-size: 1em;
  margin: 12px 0;
  padding: 12px 16px;
  border-radius: 8px;
  background: rgba(255,255,255,0.03);
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
  opacity: 1;
  color: #fff;
  display: block;
  line-height: 1.4;
  word-wrap: break-word;
  border: 1px solid transparent;
}
.task-item:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(57,255,20,0.3);
}
.task-item.completed {
  text-decoration: line-through;
  opacity: 0.7;
  color: #39ff14;
  background: rgba(57,255,20,0.1);
}
.video-number {
  color: #39ff14;
  font-weight: bold;
  margin-right: 8px;
}
@media (max-width: 600px) {
  #app {
    max-width: 80%;
  }
  header {
    flex-direction: column;
    align-items: stretch;
  }
  .top-right {
    margin: 12px 0 0 0;
    align-self: flex-end;
  }
}