:root {
  /* Dark theme (default) */
  --bg: #1a1a1f;
  --fg: #f8f8f2;
  --comment: #7970a9;
  --menu: #2d2d37;
  --visual: #44475a;
  --gutter-fg: #4b5263;
  --nontext: #424450;
  --selection: #454158;
  --red: #ff9580;
  --green: #8aff80;
  --yellow: #ffff80;
  --purple: #9580ff;
  --pink: #ff80bf;
  --cyan: #80ffea;
  --white: #f8f8f2;
  --bright-red: #ffaa99;
  --bright-green: #a2ff99;
  --bright-yellow: #ffff99;
  --bright-blue: #aa99ff;
  --bright-magenta: #ff99cc;
  --bright-cyan: #99ffee;
  --bright-white: #ffffff;

  /* Standardized aliases for this project */
  --primary-color: var(--purple);
  --secondary-color: var(--comment);
  --tertiary-color: var(--selection);
  --text-color: var(--fg);
  --bg-color: #17161d;
  /* Keeping specific bg for this tool */
  --textarea-bg: #22212c;
  --border-color: var(--selection);
  --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  --border-radius: 8px;
  --selection-color: var(--selection);
  --menu-color: #21222c;
}

[data-theme="light"] {
  /* Light theme */
  --bg: #f5f5f5;
  --fg: #1f1f1f;
  --comment: #635d97;
  --menu: #e5e5e5;
  --visual: #c5c5c5;
  --gutter-fg: #4f4f4f;
  --nontext: #3f3f3f;
  --selection: #cfcfde;
  --red: #cb3a2a;
  --green: #14710a;
  --yellow: #846e15;
  --purple: #644ac9;
  --pink: #a3144d;
  --cyan: #036a96;
  --white: #1f1f1f;
  --bright-red: #cb3a2a;
  --bright-green: #14710a;
  --bright-yellow: #846e15;
  --bright-blue: #336699;
  --bright-magenta: #644ac9;
  --bright-cyan: #036a96;
  --bright-white: #f5f5f5;

  /* Standardized aliases for this project */
  --primary-color: var(--purple);
  --secondary-color: var(--comment);
  --tertiary-color: var(--visual);
  --text-color: var(--fg);
  --bg-color: var(--bg);
  --textarea-bg: var(--bg);
  --border-color: var(--visual);
  --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --selection-color: var(--selection);
  --menu-color: var(--menu);
}

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

body {
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "SF Pro Display",
    "Segoe UI",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Helvetica,
    Arial,
    sans-serif;
  line-height: 1.5;
  color: var(--text-color);
  background-color: var(--bg-color);
  min-height: 100vh;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
  font-feature-settings:
    "kern" 1,
    "liga" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  margin-bottom: 30px;
  padding: 20px 0;
  position: relative;
}

header h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-color);
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  background-color: var(--tertiary-color);
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.input-section,
.output-section {
  background-color: var(--menu-color);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--box-shadow);
  transition: background-color 0.3s ease;
}

.input-section label,
.output-section label {
  display: block;
  margin-bottom: 10px;
  font-weight: 600;
  color: var(--text-color);
}

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

textarea {
  width: 100%;
  min-height: 150px;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family:
    "SF Mono", "Monaco", "Cascadia Code", "Roboto Mono", "Source Code Pro",
    "Fira Code", "Courier New", Consolas, monospace;
  font-size: 14px;
  font-weight: 400;
  resize: vertical;
  transition:
    border-color 0.3s ease,
    background-color 0.3s ease;
  background-color: var(--textarea-bg);
  color: var(--text-color);
  line-height: 1.5;
  letter-spacing: 0.3px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

textarea:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 3px rgba(121, 112, 169, 0.2);
}

textarea[readonly] {
  background-color: var(--textarea-bg);
}

.controls {
  display: flex;
  justify-content: center;
}

.button-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
  transform: translateY(0);
}

.btn.primary {
  background-color: var(--primary-color);
  color: white;
}

.btn.primary:hover {
  filter: brightness(1.2);
}

.btn.secondary {
  background-color: var(--secondary-color);
  color: white;
}

.btn.secondary:hover {
  filter: brightness(1.2);
}

.btn.tertiary {
  background-color: var(--tertiary-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

.btn.tertiary:hover {
  filter: brightness(1.1);
}

.copy-btn {
  background-color: transparent;
  color: var(--secondary-color);
  padding: 8px 12px;
  font-size: 14px;
}

.copy-btn:hover {
  background-color: var(--tertiary-color);
  color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 600px) {
  .container {
    padding: 15px;
  }

  header h1 {
    font-size: 2rem;
  }

  .button-group {
    flex-direction: column;
    width: 100%;
  }

  .button-group .btn {
    width: 100%;
    justify-content: center;
  }

  .output-header {
    flex-wrap: wrap;
    gap: 10px;
  }

  .copy-btn {
    margin-left: auto;
  }
}

/* Theme transition for all elements */
.btn {
  transition:
    background-color 0.3s ease,
    color 0.3s ease,
    border-color 0.3s ease;
}

/* Selection styling */
::selection {
  background-color: var(--selection-color);
  color: var(--text-color);
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--menu-color);
}

::-webkit-scrollbar-thumb {
  background: var(--secondary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

.footer {
  margin-top: 4rem;
  padding: 2rem 0;
  text-align: center;
  color: var(--comment);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
}

.footer-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer a {
  color: var(--comment);
  text-decoration: none;
  margin: 0 0.5rem;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: var(--primary-color);
}