:root{--primary:#6366f1;--primary-hover:#4f46e5;--bg-color:#f8fafc;--card-bg:#fff;--text-main:#1e293b;--text-muted:#64748b;--border-color:#e2e8f0;--shadow:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d}body{background-color:var(--bg-color);color:var(--text-main);justify-content:center;align-items:center;min-height:100vh;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex}.container{width:100%;max-width:500px;padding:20px}.card{background-color:var(--card-bg);box-shadow:var(--shadow);border:1px solid var(--border-color);border-radius:1rem;padding:2rem}.header{text-align:center;margin-bottom:2rem}.header h1{color:var(--primary);margin:0;font-size:1.8rem;font-weight:800}.header p{color:var(--text-muted);margin:.5rem 0 0;font-size:.9rem}.content{flex-direction:column;gap:1.5rem;display:flex}.input-group,.output-group{flex-direction:column;gap:.5rem;display:flex;position:relative}label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.85rem;font-weight:600}textarea{border:2px solid var(--border-color);resize:none;box-sizing:border-box;border-radius:.75rem;width:100%;padding:1rem;font-family:inherit;font-size:1rem;transition:border-color .2s}textarea:focus{border-color:var(--primary);outline:none}.clear-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:.4rem;padding:.2rem .5rem;font-size:.8rem;position:absolute;top:1.8rem;right:.5rem}.clear-btn:hover{color:var(--text-main);background-color:#f1f5f9}.output-box{word-break:break-all;white-space:pre-wrap;min-height:100px;color:var(--text-main);border:1px solid var(--border-color);background-color:#f1f5f9;border-radius:.75rem;padding:1rem;font-size:1.1rem}.placeholder{color:#94a3b8;font-size:.95rem;font-style:italic}.copy-btn{background-color:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:.75rem;margin-top:.5rem;padding:.75rem;font-weight:600;transition:all .2s}.copy-btn:hover:not(:disabled){background-color:var(--primary-hover);transform:translateY(-1px)}.copy-btn:disabled{opacity:.5;cursor:not-allowed}.copy-btn.copied{background-color:#10b981}.footer{text-align:center;color:var(--text-muted);margin-top:2rem;font-size:.75rem}