:root{--bg-main:#0f172a;--bg-card:#1e293b;--border-color:#334155;--text-main:#f8fafc;--text-muted:#94a3b8;--primary:#3b82f6;--hover-bg:#334155;--danger:#ef4444;--warning:#f59e0b;--font-mono:'JetBrains Mono', 'Fira Code', 'Courier New', monospace}.dark-theme{font-family:'Inter',system-ui,sans-serif;color:var(--text-main);background:var(--bg-main);padding:1.5rem;border-radius:1rem;min-height:600px}.text-center{text-align:center}.text-3xl{font-size:1.875rem}.font-bold{font-weight:700}.text-muted{color:var(--text-muted)}.text-danger{color:var(--danger)}.text-warning{color:var(--warning)}.text-sm{font-size:.85rem}.mt-2{margin-top:.5rem}.mt-4{margin-top:1rem}.mt-8{margin-top:2rem}.flex{display:flex}.gap-2{gap:.5rem}.app-layout{display:flex;flex-direction:column;gap:1.5rem}@media (min-width:992px){.app-layout{flex-direction:row;align-items:flex-start}.control-panel{flex:1;max-width:500px}.output-panel{flex:1;position:sticky;top:1.5rem}}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:1rem;padding:1.5rem;box-shadow:0 4px 6px -1px rgb(0 0 0 / .2)}.card h3{margin:0;font-size:1.1rem;color:#fff;display:flex;align-items:center;gap:.5rem}.card h3 i{width:20px;height:20px;color:var(--primary)}.card-header{display:flex;justify-content:space-between;align-items:center}.form-group label{display:block;font-size:.95rem;font-weight:600;margin-bottom:.5rem}.form-group .hint{font-weight:400;font-size:.8rem;color:var(--text-muted);font-style:italic;display:block;margin-top:.25rem}.form-control{width:100%;background:var(--bg-main);border:1px solid var(--border-color);color:#fff;padding:.75rem;border-radius:.5rem;font-size:.95rem;font-family:var(--font-mono);outline:none;transition:all 0.2s;resize:vertical}.form-control:focus{border-color:var(--primary)}.radio-label,.checkbox-label{display:flex;align-items:flex-start;gap:.5rem;cursor:pointer;font-size:.95rem;font-weight:400}.radio-label input,.checkbox-label input{width:16px;height:16px;margin-top:.15rem;accent-color:var(--primary)}.divider{height:1px;background:var(--border-color);margin:1.5rem 0}.btn{padding:.5rem 1rem;border-radius:.5rem;font-weight:600;cursor:pointer;border:none;transition:all 0.2s;display:inline-flex;align-items:center;gap:.5rem}.btn-sm{padding:.4rem .75rem;font-size:.85rem}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#2563eb}.btn-outline{background:#fff0;border:1px solid var(--border-color);color:var(--text-main)}.btn-outline:hover{background:var(--hover-bg)}.btn-text{background:#fff0;border:none;color:var(--primary);cursor:pointer;font-size:.85rem;text-decoration:underline;padding:0}.btn i{width:16px;height:16px}@media (max-width:640px){.hide-mobile{display:none}}.code-container{background:var(--bg-main);border:1px solid var(--border-color);border-radius:.5rem;padding:1rem;min-height:300px}pre{margin:0}.language-txt{font-family:var(--font-mono);font-size:.9rem;color:#cbd5e1;line-height:1.6;white-space:pre-wrap;word-break:break-all}.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--primary);color:#fff;padding:.75rem 1.5rem;border-radius:2rem;font-weight:600;opacity:0;transition:all 0.3s;z-index:1000}.toast.show{transform:translateX(-50%) translateY(0);opacity:1}