.light-theme,:root{--accent-color:#ffa116;--run-btn-color:#28a745}:root{--primary-color:#1a1a1a;--secondary-color:#2d2d2d;--text-color:#e0e0e0;--navbar-color:#242424;--editor-bg:#1e1e1e;--card-bg:#2d2d2d;--border-color:#444}.light-theme{--primary-color:#ffffff;--secondary-color:#f5f5f5;--text-color:#333333;--navbar-color:#ffffff;--editor-bg:#f5f5f5;--card-bg:#ffffff;--border-color:#e0e0e0}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;overflow:hidden;background-color:var(--primary-color);color:var(--text-color);transition:.3s}.navbar{background-color:var(--navbar-color)!important;box-shadow:0 2px 4px rgba(0,0,0,.1);border-bottom:1px solid var(--border-color)}.card,.form-select,.list-group-item{border-color:var(--border-color)}.navbar-brand{font-weight:700;color:var(--accent-color)!important;font-size:1.5rem}.card{background-color:var(--card-bg);color:var(--text-color);margin-bottom:1rem}.form-select,.list-group-item,.offcanvas{background-color:var(--secondary-color);color:var(--text-color)}.btn-close{filter:invert(1)}.bg-secondary{background-color:var(--secondary-color)!important}.active{background-color:var(--primary-color)!important;color:var(--text-color)!important}.editor-container{height:calc(100vh - 60px);display:flex;flex-direction:column}#editor{width:100%;flex-grow:1}.question-container{height:calc(100vh - 60px);overflow-y:auto;padding:20px;background-color:var(--primary-color)}.language-selector,pre code{background-color:var(--secondary-color);color:var(--text-color)}.status-icon{display:inline-block;width:20px;height:20px;border:2px solid #28a745;border-radius:50%;margin-right:10px}.status-icon.completed{background-color:#28a745}.question-link{cursor:pointer;padding:8px 15px;border-radius:5px;transition:background-color .2s;color:var(--text-color)}.question-link:hover,.test-case-header.passed{background-color:rgba(40,167,69,.1)}.language-selector{border:none;border-radius:4px;padding:5px 10px}pre code{display:block;padding:10px;border-radius:5px;overflow-x:auto}.btn-run{background-color:var(--run-btn-color);color:#fff!important}.output-panel,.test-result-header{background-color:var(--secondary-color)}.io-label,.io-value,.output-title,.test-case-title,.test-result-title,.test-runtime{color:var(--text-color)}.btn-run:hover{background-color:#218838;color:#fff!important}.light-theme .btn-outline-light{color:#212529!important;border-color:#dee2e6!important}.output-panel{border-top:1px solid var(--border-color)}.light-theme .btn-outline-light:hover{background-color:#f8f9fa!important}.output-panel{font-family:monospace;font-size:14px}.output-title{font-weight:600;margin-bottom:10px}.test-result-header{display:flex;justify-content:space-between;align-items:center;padding:10px 15px;border-radius:5px;margin-bottom:15px}.test-result-title{font-weight:600;font-size:1.1rem}.test-summary{display:flex;align-items:center;gap:15px}.test-runtime{font-size:.9rem;opacity:.8}.test-case{border:1px solid var(--border-color);border-radius:6px;margin-bottom:15px;overflow:hidden}.test-case-header{display:flex;align-items:center;padding:10px 15px;border-bottom:1px solid var(--border-color)}.test-case-header.failed{background-color:rgba(167,40,69,.1)}.test-case-status{display:flex;align-items:center;gap:5px;font-weight:500;margin-right:15px}.test-case-status.passed{color:#28a745}.test-case-status.failed{color:#dc3545}.test-case-title{font-weight:500}.test-case-details{padding:15px}.test-case-io{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px}.io-section{background-color:rgba(0,0,0,.05);padding:10px;border-radius:4px}.light-theme .io-section{background-color:rgba(0,0,0,.03)}.io-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.5px;opacity:.7;margin-bottom:5px}.io-value{font-family:'Courier New',monospace;font-size:.95rem;word-break:break-word}.badge{padding:5px 10px;font-size:.8rem;font-weight:500}.bg-success{background-color:#28a745!important}.difficulty-easy{color:#00b8a3}.difficulty-medium{color:#ffc01e}.difficulty-hard{color:#ff375f}.question-title{color:var(--text-color);margin-bottom:1rem}.question-meta{display:flex;gap:1rem;margin-bottom:1.5rem}.meta-item{display:flex;align-items:center;gap:.5rem}.output-panel{height:400px;background-color:var(--secondary-color);padding:15px;overflow-y:auto;position:relative}.output-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;color:var(--text-color);opacity:.6}.placeholder-icon{font-size:2.5rem;margin-bottom:1rem;color:var(--accent-color)}.placeholder-icon i{animation:2s infinite pulse}.placeholder-text h5{font-weight:600;margin-bottom:.5rem}.placeholder-text p{font-size:.9rem;margin:0}.output-content{height:100%}@keyframes pulse{0%,100%{opacity:.6}50%{opacity:1}}.btn-load{background-color:#007acc;color:#fff;border:1px solid var(--border-color)}.btn-load:hover{background-color:#005a9e}