:root {
  --bg-color: #222;
  --panel-color: #333;
  --accent-color: #4a89dc;
  --text-color: #fff;
  --button-color: #555;
  --button-hover: #666;
}

body {
  font-family: 'Courier New', monospace;
  line-height: 1.5;
  background-color: var(--bg-color);
  color: var(--text-color);
  padding: 20px;
  text-align: center;
  margin: 0;
}

h1 {
  margin-bottom: 20px;
  color: var(--accent-color);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.panel {
  background: var(--panel-color);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.control-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  margin-bottom: 15px;
}

.control-item {
  min-width: 200px;
  text-align: left;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

input[type="range"] {
  width: 100%;
  margin-bottom: 5px;
}

.range-value {
  display: inline-block;
  width: 40px;
  text-align: right;
}

select {
  width: 100%;
  padding: 8px;
  background: var(--button-color);
  color: var(--text-color);
  border: none;
  border-radius: 4px;
}

button {
  padding: 10px 20px;
  background: var(--button-color);
  color: var(--text-color);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin: 5px;
  transition: background 0.3s;
  font-family: inherit;
}

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

button.primary {
  background: var(--accent-color);
}

button.primary:hover {
  background: #5d9cec;
}

#image-source-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.source-option {
  display: none;
}

.source-option.active {
  display: block;
}

#image-url {
  width: 100%;
  padding: 8px;
  background: var(--button-color);
  color: var(--text-color);
  border: none;
  border-radius: 4px;
}

#original-image-container {
  margin: 20px auto;
  max-width: 100%;
}

#original-image {
  max-width: 100%;
  max-height: 400px;
  display: block;
  margin: 0 auto;
  border-radius: 4px;
}

#ascii-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 20px auto;
  background: #111;
  padding: 10px;
  border-radius: 4px;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
}

#ascii-container {
  display: inline-block;
  white-space: pre;
  font-size: 8px;
  letter-spacing: 1px;
  text-align: left;
  line-height: 1;
  min-width: max-content;
  margin: 0 auto;
}

.tab-buttons {
  display: flex;
  justify-content: center;
  margin-bottom: 15px;
}

.tab-button {
  padding: 10px 20px;
  background: #444;
  border: none;
  cursor: pointer;
  border-radius: 4px 4px 0 0;
  margin: 0 2px;
}

.tab-button.active {
  background: var(--accent-color);
}

@media (max-width: 768px) {
  .control-item {
    min-width: 150px;
  }
  
  button {
    padding: 8px 15px;
    font-size: 14px;
  }
}