:root {
  --opencc-body-bg: #ffffff;
  --opencc-text-color: #1f2328;
  --opencc-textarea-bg: #f6f8fa;
  --opencc-textarea-sd: rgba(31, 35, 40, 0.15);
  --opencc-button-bg: #207daf;
  --opencc-button-hover: #1a6ba5;
  --opencc-button-text: #fff;
  --opencc-success-bg: #66a51c;
  --opencc-border-radius: 5px;
  --opencc-padding: 5px 15px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --opencc-body-bg: #0d1117;
    --opencc-text-color: #f0f6fc;
    --opencc-textarea-bg: #151b23;
    --opencc-textarea-sd: rgba(240, 246, 252, 0.1);
    --opencc-button-bg: #3199d1;
    --opencc-button-hover: #2387c2;
    --opencc-button-text: #fff;
    --opencc-success-bg: #5a8f1a;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  min-height: 100%;
  background-color: var(--opencc-body-bg);
  color: var(--opencc-text-color);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1 0 auto;
  padding: 20px 8px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

body textarea {
  background-color: var(--opencc-textarea-bg);
  color: var(--opencc-text-color);
  border: 1px solid transparent;
  border-radius: var(--opencc-border-radius);
  padding: 10px;
  box-sizing: border-box;
  box-shadow: 0 0 0 1px var(--opencc-textarea-sd);
}

.radio-item,
.module {
  float: left;
  width: 50%;
  box-sizing: border-box;
  margin-bottom: 20px;
}
.radio-item input[type='radio'],
.radio-item input[type='radio'] + label {
  cursor: pointer;
}
.content-textarea,
.tools-bar {
  padding: 0 10px;
}
.content-textarea textarea {
  width: 100%;
  resize: vertical;
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 10px;
}

.tools-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.tools-bar button {
  cursor: pointer;
  padding: var(--opencc-padding);
  background-color: var(--opencc-button-bg);
  border: 1px solid var(--opencc-button-bg);
  border-radius: var(--opencc-border-radius);
  color: var(--opencc-button-text);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.tools-bar button:hover {
  background-color: var(--opencc-button-hover);
  border-color: var(--opencc-button-hover);
  transform: translateY(-1px);
}

.tools-bar button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  background-color: var(--opencc-body-bg) !important;
  border-color: var(--opencc-textarea-bg) !important;
}

.tools-bar button.copied {
  background-color: var(--opencc-success-bg);
  border-color: var(--opencc-success-bg);
}

.auto-convert-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 14px;
  padding: var(--opencc-padding);
  background-color: var(--opencc-textarea-bg);
  border: 1px solid var(--opencc-textarea-bg);
  border-radius: var(--opencc-border-radius);
  transition: all 0.2s ease;
}

.auto-convert-label:hover {
  background-color: var(--opencc-body-bg);
  border-color: var(--opencc-button-bg);
}

.auto-convert-label input[type='checkbox'] {
  cursor: pointer;
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--opencc-button-bg);
}

.auto-convert-label.checked {
  background-color: var(--opencc-button-bg);
  color: var(--opencc-button-text);
  border-color: var(--opencc-button-bg);
}

.auto-convert-label.checked:hover {
  background-color: var(--opencc-button-hover);
  border-color: var(--opencc-button-hover);
}

.footer {
  flex-shrink: 0;
  text-align: center;
  padding: 10px 0;
  width: 100%;
  background-color: var(--opencc-body-bg);
  border-top: 1px solid var(--opencc-textarea-bg);
  font-size: 12px;
  color: var(--opencc-text-color);
  opacity: 0.7;
}

.footer a {
  color: var(--opencc-text-color);
}

.main::after {
  content: '';
  display: table;
  clear: both;
}

.margin-left {
  margin-left: 15px;
}

@media (max-width: 768px) {
  .radio-item,
  .module {
    width: 100%;
  }

  .tools-bar {
    justify-content: stretch;
  }

  .tools-bar button,
  .auto-convert-label {
    flex: 1;
    justify-content: center;
    min-width: 120px;
  }

  .page-content {
    padding: 15px 8px;
  }
}

.tools-bar button:hover svg {
  transform: scale(1.1);
}

.tools-bar button svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.main h1 {
  text-align: center;
  margin-bottom: 30px;
  font-size: 24px;
  font-weight: 600;
}

fieldset {
  background-color: var(--opencc-textarea-bg);
  border: 1px solid var(--opencc-body-bg);
  border-radius: var(--opencc-border-radius);
  padding: 20px;
  margin-bottom: 30px;
}

fieldset legend {
  padding: 0 10px;
  font-weight: 600;
  font-size: 16px;
}

.module {
  background-color: var(--opencc-textarea-bg);
  border: 1px solid var(--opencc-body-bg);
  border-radius: var(--opencc-border-radius);
  padding: 20px;
  margin-bottom: 20px;
}

.module h3 {
  margin-bottom: 15px;
  font-size: 16px;
  font-weight: 600;
}