:root {
  --bg-color: #f0f0f0;
  --text-color: #333;
  --container-bg: #fff;
  --container-shadow: rgba(0, 0, 0, 0.1);
  --button-bg: #4caf50;
  --button-hover: #45a049;
  --input-border: #ccc;
}

.dark-mode {
  --bg-color: #333;
  --text-color: #f0f0f0;
  --container-bg: #555;
  --container-shadow: rgba(0, 0, 0, 0.3);
  --button-bg: #2a752e;
  --button-hover: #225f25;
  --input-border: #777;
}

body {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  margin: 0;
  padding-top: 5vh;
  font-family: Arial, sans-serif;
  overflow-x: hidden;
  user-select: none;
  background: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
  overflow: hidden; /* 隐藏滚动条 */
}

.main-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  width: 95%;
  max-width: 1400px;
  margin: 20px auto;
  gap: 20px;
}

.clock-container {
  flex: 5;
  text-align: center;
  background: var(--container-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px var(--container-shadow);
}

#clock {
  font-size: clamp(4rem, 15vw, 70rem);
  margin: 20px 5px;
}

.left-container,
.right-container {
  flex: 1;
  background: var(--container-bg);
  padding: 10px;
  border-radius: 10px;
  box-shadow: 0 0 10px var(--container-shadow);
  overflow-y: auto;
  font-size: 0.8rem;
}

.side-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 200px;
  height: 300px;
  background: var(--container-bg);
  box-shadow: 0 0 15px var(--container-shadow);
  transition: transform 0.3s ease-out, opacity 0.3s ease-out;
  overflow-y: auto;
  z-index: 1000;
  transform: translateY(120%);
  opacity: 0;
  border-radius: 10px;
  font-size: 0.8rem;
}

.side-container.visible {
  transform: translateY(0);
  opacity: 1;
}

.set-time-container,
.record-container {
  padding: 10px;
}

button {
  width: 100%;
  margin: 6px 0;
  padding: 8px 0;
  font-size: 0.8rem;
  cursor: pointer;
  background-color: var(--button-bg);
  color: white;
  border: none;
  border-radius: 5px;
  transition: background-color 0.3s;
}

button:hover {
  background-color: var(--button-hover);
}

input[type="time"],
input[type="text"],
input[type="color"] {
  width: calc(100% - 12px);
  margin: 6px 0;
  padding: 8px;
  font-size: 0.8rem;
  border: 1px solid var(--input-border);
  border-radius: 5px;
  background-color: var(--container-bg);
  color: var(--text-color);
}

ul {
  list-style: none;
  padding: 0;
}

li {
  margin: 6px 0;
  padding: 8px;
  background: var(--bg-color);
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.7rem;
}

h2 {
  margin-top: 0;
  font-size: 0.9rem;
  text-align: center;
}

#endTimesList div,
#recordList li {
  font-size: 0.7rem;
  margin: 4px 0;
  padding: 6px;
  background: var(--bg-color);
  border-radius: 5px;
}

#endTimesList button,
#recordList li button {
  font-size: 0.7rem;
  padding: 2px 4px;
  width: auto;
}

#toggleButton,
#darkModeToggle,
#settingsButton {
  position: fixed;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--button-bg);
  color: white;
  border: none;
  cursor: pointer;
  transition: opacity 0.3s;
  z-index: 1001;
  opacity: 0.7;
  font-size: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

#toggleButton {
  bottom: 20px;
  right: 20px;
}

#darkModeToggle {
  bottom: 70px;
  right: 20px;
}

#settingsButton {
  bottom: 20px;
  left: 20px;
}

#toggleButton:hover,
#darkModeToggle:hover,
#settingsButton:hover {
  opacity: 1;
}

#settingsContainer {
  position: fixed;
  bottom: 20px;
  left: 20px;
  width: 200px;
  height: 300px;
  background: var(--container-bg);
  box-shadow: 0 0 15px var(--container-shadow);
  transition: transform 0.3s ease-out, opacity 0.3s ease-out;
  overflow-y: auto;
  z-index: 1000;
  transform: translateY(120%);
  opacity: 0;
  border-radius: 10px;
  font-size: 0.8rem;
  padding: 10px;
}

#settingsContainer.visible {
  transform: translateY(0);
  opacity: 1;
}

#settingsContainer h2 {
  margin-top: 0;
  margin-bottom: 10px;
}

#settingsContainer label {
  display: block;
  margin-top: 10px;
  font-size: 0.8rem;
}

#settingsContainer input[type="color"] {
  width: 100%;
  height: 30px;
  padding: 0;
}

@media (max-width: 768px) {
  /* styles for small screens */
  .main-container {
    flex-direction: column;
  }
  .clock-container {
    width: 100%;
  }
  .left-container,
  .right-container {
    width: 50%;
  }
}

@media (max-width: 480px) {
  /* styles for extra small screens */
  .main-container {
    padding: 10px;
  }
  .clock-container {
    font-size: 2rem;
  }
  .left-container,
  .right-container {
    width: 100%;
  }
}

@media (min-width: 1400px) {
  /* styles for large screens */
  .main-container {
    grid-template-columns: repeat(3, 1fr);
  }
  .left-container,
  .right-container {
    grid-column: 2 / 3;
  }
}