:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--accent-primary: #6366f1;--accent-secondary: #8b5cf6;--text-primary: #f8fafc;--text-secondary: #94a3b8;--border-color: #334155}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-primary);color:var(--text-primary);min-height:100vh}.app-container{max-width:1400px;margin:0 auto;padding:2rem;min-height:100vh;display:flex;flex-direction:column}.header{margin-bottom:1.5rem;text-align:center;position:relative}.header-actions{position:absolute;top:0;right:0;display:flex;align-items:center;gap:1rem}.github-link{color:var(--text-secondary);transition:color .2s}.github-link:hover{color:var(--accent-primary)}.lang-btn{display:flex;align-items:center;gap:.25rem;padding:.375rem .75rem;border-radius:.375rem;border:1px solid var(--border-color);background:transparent;color:var(--text-secondary);font-size:.875rem;cursor:pointer;transition:all .2s}.lang-btn:hover{border-color:var(--accent-primary);color:var(--accent-primary)}.header-content{display:flex;flex-direction:column;align-items:center;gap:.5rem}.logo{display:flex;align-items:center;gap:1rem}.logo-icon{width:48px;height:48px;color:var(--accent-primary)}h1{font-size:1.75rem;font-weight:800;background:linear-gradient(to right,var(--accent-primary),var(--accent-secondary));background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin:0}.subtitle{color:var(--text-secondary);font-size:1.1rem}.converter-container{display:grid;grid-template-columns:1fr auto 1fr;gap:2rem;flex:1;height:calc(100vh - 200px);min-height:500px}.panel{background:var(--bg-secondary);border-radius:1rem;border:1px solid var(--border-color);display:flex;flex-direction:column;overflow:hidden;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}.panel-header{padding:1rem;border-bottom:1px solid var(--border-color);display:flex;align-items:center;gap:.75rem;background:#0003}.panel-icon{color:var(--accent-primary)}h2{font-size:1rem;font-weight:600;margin:0;flex:1}.decode-btn{display:flex;align-items:center;gap:.25rem;padding:.375rem .75rem;border-radius:.375rem;border:1px solid var(--border-color);background:transparent;color:var(--text-secondary);font-size:.75rem;cursor:pointer;transition:all .2s}.decode-btn:hover{border-color:var(--accent-primary);color:var(--accent-primary)}.editor{flex:1;background:transparent;border:none;padding:1rem;color:var(--text-primary);font-family:JetBrains Mono,monospace;font-size:.9rem;resize:none;outline:none;line-height:1.5}.action-panel{display:flex;flex-direction:column;justify-content:center;gap:1rem}.action-btn{display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:.5rem;border:none;font-weight:600;cursor:pointer;transition:all .2s;min-width:160px}.action-btn.primary{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;box-shadow:0 4px 12px #6366f14d}.action-btn.primary:hover{transform:translateY(-1px);box-shadow:0 6px 16px #6366f166}.action-btn.secondary{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary)}.action-btn.secondary:hover{border-color:var(--accent-primary);color:var(--accent-primary)}.action-btn:disabled{opacity:.7;cursor:not-allowed}.copy-btn{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:.5rem;border-radius:.25rem;transition:all .2s}.copy-btn:hover{background:#ffffff1a;color:var(--text-primary)}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.checkbox-label{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;cursor:pointer;color:var(--text-secondary);font-size:.9rem;transition:color .2s}.checkbox-label:hover{color:var(--text-primary)}.checkbox-label input[type=checkbox]{width:1rem;height:1rem;accent-color:var(--accent-primary);cursor:pointer}.toast{position:fixed;top:2rem;left:50%;transform:translate(-50%);background:var(--accent-primary);color:#fff;padding:.75rem 1.5rem;border-radius:.5rem;font-weight:600;box-shadow:0 4px 12px #6366f166;animation:toast-in .3s ease;z-index:1000}@keyframes toast-in{0%{opacity:0;transform:translate(-50%) translateY(-1rem)}to{opacity:1;transform:translate(-50%) translateY(0)}}