*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.6}.converter-container,body{transition:background-color .3s ease,color .3s ease}.converter-container{min-height:100vh;padding:2rem;max-width:1200px;margin:0 auto}.converter-container.light-mode{background-color:#f8f9fa;color:#333}.converter-container.dark-mode{background-color:#1a1a1a;color:#f0f0f0}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}header h1{font-size:1.8rem}@media(min-width:768px){header h1{font-size:2.2rem}}header .theme-toggle{border:none;border-radius:6px;cursor:pointer;font-weight:600;transition:all .3s ease;background:rgba(0,0,0,0);font-size:1.2rem;padding:8px 12px}header .theme-toggle:disabled{opacity:.5;cursor:not-allowed}.light-mode header .theme-toggle{color:#333}.dark-mode header .theme-toggle{color:#f0f0f0}header .theme-toggle:hover{background-color:rgba(0,0,0,.1)}.dark-mode header .theme-toggle:hover{background-color:hsla(0,0%,100%,.1)}main .input-section{display:flex;flex-direction:column;gap:1.5rem}main .field-container{display:flex;flex-direction:column;gap:.5rem}main .field-container label{font-weight:600;font-size:1rem}main .field-container textarea{width:100%;padding:1rem;border-radius:6px;border:1px solid #ddd;font-family:inherit;font-size:.95rem;resize:vertical;transition:border .3s ease,background-color .3s ease}.light-mode main .field-container textarea{background-color:#fff;color:#333}.dark-mode main .field-container textarea{background-color:#2c2c2c;color:#f0f0f0;border-color:#444}main .field-container textarea:focus{outline:none;border-color:#4a90e2;box-shadow:0 0 0 2px rgba(74,144,226,.2)}main .output-container .output-header{display:flex;justify-content:space-between;align-items:center}main .controls{display:flex;gap:1rem;flex-wrap:wrap}main .controls button{padding:10px 16px;border:none;border-radius:6px;cursor:pointer;font-weight:600;transition:all .3s ease;flex:1;min-width:120px}main .controls button:disabled{opacity:.5;cursor:not-allowed}@media(min-width:576px){main .controls button{flex:0 0 auto}}main .controls .convert-btn{background-color:#4a90e2;color:#fff}main .controls .convert-btn:hover:not(:disabled){background-color:#3a70b2}.light-mode main .controls .clear-btn{background-color:#e7e7e7;color:#333}.light-mode main .controls .clear-btn:hover:not(:disabled){background-color:#d7d7d7}.dark-mode main .controls .clear-btn{background-color:#444;color:#f0f0f0}.dark-mode main .controls .clear-btn:hover:not(:disabled){background-color:#555}main .copy-btn{border-radius:6px;cursor:pointer;font-weight:600;transition:all .3s ease;background-color:rgba(0,0,0,0);border:1px solid;font-size:.9rem;padding:6px 12px}main .copy-btn:disabled{opacity:.5;cursor:not-allowed}.light-mode main .copy-btn{border-color:#4a90e2;color:#4a90e2}.light-mode main .copy-btn:hover{background-color:rgba(74,144,226,.1)}.dark-mode main .copy-btn{border-color:#4a90e2;color:#4a90e2}.dark-mode main .copy-btn:hover{background-color:rgba(74,144,226,.2)}main .error-message{padding:12px;border-radius:6px;background-color:#f8d7da;color:#721c24;margin-bottom:1rem}.dark-mode main .error-message{background-color:#442224;color:#f8d7da}footer{margin-top:3rem;text-align:center;font-size:.9rem;opacity:.8}footer p{max-width:600px;margin:0 auto}@media(max-width:768px){.converter-container{padding:1rem}header{margin-bottom:1.5rem}main .field-container textarea{padding:.75rem}footer{margin-top:2rem}}