:root{--bg-color: #0f1115;--panel-bg: #161b22;--text-primary: #e6edf3;--text-secondary: #8b949e;--accent-color: #7ee787;--border-color: #30363d;--danger-color: #f85149;--warning-color: #d29922;--input-bg: #0d1117}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--bg-color);color:var(--text-primary);-webkit-font-smoothing:antialiased}input,textarea,select{background-color:var(--input-bg);color:var(--text-primary);border:1px solid var(--border-color);border-radius:6px;padding:8px 12px;font-family:inherit;font-size:.9rem;transition:border-color .2s}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent-color)}button{cursor:pointer;border:1px solid var(--border-color);background-color:var(--panel-bg);color:var(--text-primary);padding:8px 16px;border-radius:6px;font-weight:500;transition:all .2s}button:hover{background-color:var(--border-color)}button.primary{background-color:var(--accent-color);color:#0f1115;border-color:var(--accent-color)}button.primary:hover{opacity:.9}.app-container{display:flex;height:100vh;overflow:hidden}.sidebar{width:400px;background-color:var(--panel-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column;overflow-y:auto}.main-content{flex:1;display:flex;flex-direction:column;background-color:var(--bg-color);overflow:hidden}.top-bar{height:60px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;padding:0 24px;justify-content:space-between;background-color:var(--panel-bg)}.preview-area{flex:1;padding:24px;display:flex;flex-direction:column;overflow-y:auto}.section-title{font-size:.8rem;text-transform:uppercase;letter-spacing:1px;color:var(--text-secondary);margin-top:24px;margin-bottom:12px;font-weight:600}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:.85rem;color:var(--text-secondary);margin-bottom:6px}.form-group input,.form-group textarea,.form-group select{width:100%;box-sizing:border-box}.form-group textarea{min-height:80px;resize:vertical}.preview-box{background-color:var(--input-bg);border:1px solid var(--border-color);border-radius:8px;padding:20px;white-space:pre-wrap;font-family:JetBrains Mono,Fira Code,monospace;font-size:.9rem;line-height:1.6;color:var(--text-primary);flex:1;overflow-y:auto}.mode-toggle{display:flex;gap:8px;background:var(--input-bg);padding:4px;border-radius:8px}.mode-toggle button{border:none;background:transparent;padding:6px 12px;font-size:.85rem;border-radius:6px}.mode-toggle button.active{background-color:var(--panel-bg);color:var(--text-primary);font-weight:600;box-shadow:0 1px 3px #0003}.btn-icon{display:inline-flex;align-items:center;gap:6px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#484f58}.warning-box{background-color:#d2992226;border:1px solid var(--warning-color);color:#e3b341;padding:12px;border-radius:6px;margin-bottom:16px;font-size:.9rem}