:root {
     --bg: #0b0f1a;
     --panel: #161b2a;
     --accent: #0ea5e9;
     --text-dim: #94a3b8;
     --success: #22c55e;
     --warning: #f59e0b;
 }

 body {
     background: var(--bg);
     color: #e2e8f0;
     font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
     margin: 0;
     padding: 20px;
 }

 .header {
     text-align: center;
     margin-bottom: 25px;
 }

 .header h1 {
     color: var(--accent);
     margin-bottom: 5px;
 }

 /* Dashboard de Estadísticas */
 .stats-container {
     display: grid;
     grid-template-columns: repeat(4, 1fr);
     gap: 15px;
     margin-bottom: 20px;
 }

 .stat-card {
     background: var(--panel);
     padding: 15px;
     border-radius: 12px;
     border: 1px solid #2e3c51;
     text-align: center;
 }

 .stat-value {
     display: block;
     font-size: 1.4rem;
     font-weight: bold;
     color: var(--accent);
 }

 .stat-label {
     font-size: 0.75rem;
     color: var(--text-dim);
     text-transform: uppercase;
     letter-spacing: 0.05em;
 }

 .highlight {
     color: var(--success);
 }

 .main-grid {
     display: grid;
     grid-template-columns: 1fr 1fr;
     gap: 20px;
 }

 .editor-container {
     position: relative;
 }

 .editor-label {
     margin-bottom: 8px;
     font-size: 0.85rem;
     color: var(--text-dim);
     font-weight: 600;
 }

 textarea {
     width: 100%;
     height: 500px;
     background: var(--panel);
     color: #7dd3fc;
     border: 1px solid #2e3c51;
     border-radius: 8px;
     padding: 15px;
     font-family: 'Fira Code', 'Cascadia Code', monospace;
     font-size: 12px;
     outline: none;
     box-sizing: border-box;
     resize: none;
 }

 textarea:focus {
     border-color: var(--accent);
 }

 .btn-convert {
     grid-column: span 2;
     padding: 18px;
     background: var(--accent);
     color: white;
     border: none;
     border-radius: 8px;
     font-size: 1rem;
     font-weight: bold;
     cursor: pointer;
     transition: transform 0.1s;
     margin-top: 10px;
 }

 .btn-convert:active {
     transform: scale(0.99);
 }

 .copy-btn {
     position: absolute;
     top: 32px;
     right: 15px;
     background: #2e3c51;
     color: white;
     border: none;
     padding: 4px 10px;
     border-radius: 4px;
     cursor: pointer;
     font-size: 11px;
     z-index: 10;
 }