body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: white;
  text-align: center;
  background-color: #000;
}

body > img {
  position: fixed;
  top: 0;
  left: 50%;
  height: 100vh;
  width: auto;
  transform: translateX(-50%);
  z-index: -1;
}

#clock {
  font-size: 3rem;
  margin-top: 40px;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.7);
}

.record {
  font-size: 1.5rem;
  margin-top: 10px;
}

#recordtime {
  margin-top: 8px;
  padding: 6px 12px;
  border: none;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.5);
  color: white;
  cursor: pointer;
}
#recordtime:hover {
  background: rgba(0, 0, 0, 0.7);
}

#todo-list {
  list-style: none;
  padding: 0;
  margin: 20px auto 0;
  display: inline-block;
}

#todo-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0;
}

.hidden {
    display: none;
}