:root[data-theme="light"] {
  /* --bg-primary: #ffffff;
  --bg-secondary: #f6f8fa;
  --bg-tertiary: #ffffff;
  --bg-canvas: #f6f8fa;*/
  --border-default: #d1d9e0;
  --border-muted: #d1d9e0b3;/*
  --text-primary: #1f2328;
  --text-secondary: #636c76;*/
  --text-tertiary: #8c959f;
  --accent-primary: #0969da;
  --accent-secondary: #0969da1a;
  --accent-hover: #0860ca;
  --success: #1a7f37;
  --success-bg: #dafbe1;
  --danger: #d1242f;
  --danger-bg: #ffebe9;
  --shadow-small: 0 1px 3px rgba(31, 35, 40, 0.12);
  --shadow-medium: 0 4px 8px rgba(31, 35, 40, 0.12);
} 
    
    

:root[data-theme="dark"] {/*
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-canvas: #0d1117;*/
  --border-default: #30363d;
  --border-muted: #30363d66;/*
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;*/
  --text-tertiary: #6e7681;
  --accent-primary: #2f81f7;
  --accent-secondary: #2f81f71a;
  --accent-hover: #388bfd;
  --success: #3fb950;
  --success-bg: #0d4426;
  --danger: #f85149;
  --danger-bg: #da3633;
  --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.24);
  --shadow-medium: 0 4px 8px rgba(0, 0, 0, 0.24);
}
/*
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
}*/
    /*
body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  padding: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background-color 0.2s, color 0.2s;
}*/

.container {
  max-width: 1000px;
  width: 100%;
background-color: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: 12px;
  padding: 24px;
  margin: 16px;
  box-shadow: var(--shadow-medium);
}
/*
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-default);
}

.header-content h1 {
  color: var(--text-primary);
  margin-bottom: 4px;
  font-size: 24px;
  font-weight: 600;
}

.header-content .subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 400;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}
*/
.lang-selector,
.theme-toggle {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 6px;
  padding: 6px 12px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.2s, border-color 0.2s;
}

.lang-selector:hover,
.theme-toggle:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--border-default);
}

.lang-selector:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-secondary);
}

.language-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding: 16px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  flex-wrap: wrap;
  gap: 16px;
}

.language-selector {
  display: flex;
  align-items: center;
  gap: 8px;
}

.language-selector label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
  min-width: 32px;
}

select {
  padding: 6px 12px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  font-size: 14px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  min-width: 140px;
  font-weight: 400;
  transition: border-color 0.2s, background-color 0.2s;
}

select:hover {
  border-color: var(--text-secondary);
}

select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-secondary);
}

.swap-button {
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
  font-size: 16px;
  font-weight: normal;
}

.swap-button:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.text-areas {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  .text-areas {
    grid-template-columns: 1fr;
  }
}

.input-section,
.output-section {
  display: flex;
  flex-direction: column;
}

.section-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  padding: 0 2px;
}

.section-label label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
}

.chars-count {
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 400;
}

textarea {
  width: 100%;
  min-height: 200px;
  padding: 12px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  font-size: 14px;
  resize: none;
 /* background-color: var(--bg-primary);*/
  color: var(--text-primary);
  transition: border-color 0.2s;
  font-family: inherit;
  line-height: 1.5;
}

textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-secondary);
}

textarea::placeholder {
  color: var(--text-tertiary);
}

.output-text {
  min-height: 200px;
  padding: 12px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background-color: var(--bg-secondary);
  font-size: 14px;
  white-space: pre-wrap;
  color: var(--text-primary);
  line-height: 1.5;
}

.button-container {
  display: flex;
  justify-content: center;
  margin: 20px 0;
}

.btn {
  background-color: var(--accent-primary);
  color: #ffffff;
  border: 1px solid transparent;
  padding: 6px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  line-height: 20px;
}

.btn:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-secondary:hover {
  background-color: var(--bg-tertiary);
}

.utility-buttons {
  display: flex;
  justify-content: flex-start;
  margin-top: 16px;
  gap: 8px;
  flex-wrap: wrap;
}

.loading {
  display: none;
  text-align: center;
  margin: 16px 0;
  padding: 16px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
}

.loading p {
  color: var(--text-secondary);
  font-weight: 400;
  margin-top: 8px;
  font-size: 14px;
}

.spinner {
  border: 2px solid var(--border-muted);
  border-left: 2px solid var(--accent-primary);
  border-radius: 50%;
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  
  100% {
    transform: rotate(360deg);
  }
}

.alert {
  text-align: center;
  margin: 16px 0;
  display: none;
  padding: 12px 16px;
  border-radius: 6px;
  font-weight: 400;
  font-size: 14px;
}

.alert-error {
  color: var(--danger);
  background-color: var(--danger-bg);
  border: 1px solid var(--danger);
}

.alert-success {
  color: var(--success);
  background-color: var(--success-bg);
  border: 1px solid var(--success);
}

.examples {
  margin-top: 24px;
  padding: 16px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
}

.examples h3 {
  margin-bottom: 12px;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 16px;
}

.example-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.example-btn {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  padding: 4px 12px;
  border-radius: 16px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  transition: background-color 0.2s, border-color 0.2s;
}

.example-btn:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--text-secondary);
}

.footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-default);
  color: var(--text-tertiary);
  font-size: 12px;
  font-weight: 400;
}

.powered {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s;
}

.powered:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* Responsive improvements */
@media (max-width: 768px) {
  .container {
    padding: 16px;
    border-radius: 8px;
    margin: 8px;
  }
  
  .language-controls {
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
  }
  
  .language-selector {
    justify-content: space-between;
  }
  
  .swap-button {
    align-self: center;
    margin: 8px 0;
  }
  
  .utility-buttons {
    justify-content: center;
  }
}