:root {
  /* Light mode variables (default) */
  --background-color: #f5f5f5;
  --container-background: white;
  --text-color: #333;
  --border-color: #ddd;
  --link-color: #4285f4;
  --button-color: #4285f4;
  --button-text: white;
  --result-background: #f0f7ff;
  --test-box-background: #f8f9fa;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --changelog-border: #ffffc2;
  --version-color: #4285f4;
  --date-color: #777;
  --separator-color: #eee;
  --domain-badge-bg: #333;
  --domain-badge-text: #fff;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark mode variables */
    --background-color: #212121;
    --container-background: #2d2d2d;
    --text-color: #e0e0e0;
    --border-color: #444;
    --link-color: #7cabff;
    --button-color: #5c95f6;
    --button-text: white;
    --result-background: #353d48;
    --test-box-background: #333;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --changelog-border: #4d4d2a;
    --version-color: #7cabff;
    --date-color: #aaa;
    --separator-color: #444;
    --domain-badge-bg: #111;
    --domain-badge-text: #ddd;
  }
}

html {
  height: 100%;
  width: 100%;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 20px;
  background-color: var(--background-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--container-background);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
  transition: background-color 0.3s ease;
}

h1 {
  text-align: center;
  color: var(--text-color);
}

form {
  display: flex;
  margin: 20px 0;
}

input[type="url"], input[type="text"] {
  flex: 1;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px 0 0 4px;
  font-size: 16px;
  background-color: var(--container-background);
  color: var(--text-color);
}

button {
  padding: 10px 15px;
  background-color: var(--button-color);
  color: var(--button-text);
  border: none;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s ease;
}

code {
  background-color: var(--background-color);
  padding: 2px 4px;
  border-radius: 3px;
  font-family: monospace;
  font-size: 1em;
  color: var(--text-color);
}

#result {
  margin-top: 20px;
  padding: 15px;
  background-color: var(--result-background);
  border-radius: 4px;
}

#redirectUrl {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
  font-size: 14px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--container-background);
  color: var(--text-color);
}

.hidden {
  display: none;
}

#copyButton {
  width: 100%;
  border-radius: 4px;
  margin-top: 5px;
}

.test-box {
  background-color: var(--test-box-background);
  border-left: 4px solid var(--link-color);
  padding: 12px 15px;
  margin: 15px 0;
  border-radius: 4px;
}

.test-box ul {
  margin: 10px 0 5px 20px;
}

.test-box a {
  color: var(--link-color);
  text-decoration: none;
}

.test-box a:hover {
  text-decoration: underline;
}

.changelog {
  margin-top: 20px;
  border: solid;
  border-color: var(--changelog-border);
  border-width: thin;
}

.changelog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--separator-color);
  cursor: pointer;
}

.changelog h2 {
  margin: 0;
  padding: 10px 0;
}

.toggle-icon {
  font-size: 18px;
  transition: transform 0.3s ease;
}

.changelog-content {
  max-height: 500px;
  overflow-y: auto;
  transition: max-height 0.5s ease;
}

.collapsed .changelog-content {
  max-height: 0;
  overflow: hidden;
}

.collapsed .toggle-icon {
  transform: rotate(-90deg);
}

.version-entry {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--separator-color);
}

.version-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
}

.version-number {
  font-weight: bold;
  color: var(--version-color);
  font-size: 1.2em;
}

.version-date {
  color: var(--date-color);
  font-size: 0.9em;
}

.change-list {
  list-style-type: disc;
  margin-left: 20px;
}

.change-item {
  margin-bottom: 5px;
}