:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;--text-color: rgba(255, 255, 255, .87);--background-color: #222;--surface-color: #333;--border-color: #555;--primary-color: #1976d2;--primary-text-color: white;--danger-color: #d32f2f;--warning-color: orange;--success-color: green;--button-background-color: #1a1a1a;--button-hover-border-color: #646cff;--btn-a-color: #e21b3c;--btn-b-color: #1368ce;--btn-c-color: #d89e00;--btn-d-color: #26890c;color:var(--text-color);background-color:var(--background-color);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(prefers-color-scheme:light){:root{--text-color: #213547;--background-color: #ffffff;--surface-color: #e3f2fd;--border-color: #ccc;--button-background-color: #f9f9f9}}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:var(--button-background-color);color:var(--text-color);cursor:pointer;transition:border-color .25s}button:hover{border-color:var(--button-hover-border-color)}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}.admin-container{padding:20px;font-family:sans-serif}.admin-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.admin-column{border:1px solid var(--border-color);padding:10px}.round-control{margin-bottom:20px;padding:10px;background:var(--surface-color)}.round-control select{margin-left:10px;padding:5px;background-color:var(--button-background-color);color:var(--text-color)}.round-control button{color:var(--primary-text-color);padding:10px 20px;border:none;cursor:pointer}.start-round-btn{background:var(--primary-color)}.end-round-btn{background:var(--danger-color)}.question-control{margin-bottom:20px}.ko-round-btn{margin-bottom:10px;background:var(--danger-color);color:var(--primary-text-color);padding:5px}.question-item{margin-bottom:10px;padding:10px;border:1px solid var(--border-color)}.question-item.active{background:var(--surface-color)}.question-item button{margin-top:5px;color:var(--primary-text-color);padding:5px 10px;border:none;cursor:pointer}.start-question-btn{background:var(--success-color)}.start-question-btn:disabled{background:var(--border-color)}.stop-question-btn{margin-top:10px;background:var(--warning-color);padding:10px;border:none;cursor:pointer;font-weight:700}.panic-btn{margin-top:10px;margin-left:10px;background:var(--danger-color);color:var(--primary-text-color);padding:10px;border:none;cursor:pointer;font-weight:700}.reset-btn{margin-top:10px;margin-left:10px;background:#444;color:#ccc;padding:5px;border:none;cursor:pointer;font-size:.8rem}.live-status{background:var(--surface-color);padding:5px;margin-bottom:10px}.active-question{padding:10px;background:var(--surface-color);border:1px solid var(--success-color)}.show-answers-table{width:100%;text-align:left}.show-answers-table .correct{color:var(--success-color)}.show-answers-table .incorrect{color:var(--danger-color)}.upgrade-control{display:flex;gap:10px;margin:10px 0}.upgrade-control input{flex-grow:1;padding:8px;font-size:1rem}.downgrade-btn{background-color:#555;color:#fff;border:none;padding:3px 8px;font-size:.8rem;border-radius:3px;cursor:pointer}.status-pending{font-style:italic;color:#888}.status-not-answered{font-weight:700;color:#555}.group-scores{margin-top:20px;border-top:2px solid var(--border-color);padding-top:10px}.group-scores-table{width:100%;text-align:left}.reset-scores-btn{margin-top:10px;font-size:.8rem}body,html{margin:0;padding:0;width:100%;height:100%;background-color:var( --background-color )}#root{width:100%;height:100%}.candidate-wrapper{min-height:100vh;padding:20px;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:var(--text-color);transition:background-color .5s ease;display:block;flex-direction:column;box-sizing:border-box;position:relative}.candidate-wrapper.panic-mode{background-color:var(--danger-color);animation:pulse-bg 1s infinite alternate}@keyframes pulse-bg{0%{background-color:var(--danger-color)}to{background-color:#8a0000}}.login-container{max-width:400px;margin:50px auto;text-align:center}.input-field{display:block;width:100%;padding:15px;margin-bottom:15px;font-size:1.1rem;border-radius:8px;border:1px solid var(--border-color);background:var(--surface-color);color:var(--text-color);box-sizing:border-box}.btn-main{width:100%;padding:15px;font-size:1.2rem;font-weight:700;background-color:var(--primary-color);color:var(--primary-text-color);border:none;border-radius:8px;cursor:pointer;transition:transform .1s}.btn-main:active{transform:scale(.98)}.header{display:flex;justify-content:space-between;align-items:center;padding-bottom:15px;border-bottom:1px solid var(--border-color);margin-bottom:20px}.btn-logout{background:var(--surface-color);color:var(--text-color);border:none;padding:8px 12px;border-radius:4px;cursor:pointer}.header-right{display:flex;align-items:center;gap:10px}.participant-code{background-color:var(--surface-color);padding:5px 10px;border-radius:4px;font-size:.9rem}.participant-code-box{margin-top:30px;padding:15px;background-color:var(--surface-color);border-radius:8px;border:1px solid var(--border-color);text-align:center}.participant-code-box strong{display:block;font-size:2rem;letter-spacing:3px;margin-top:5px;color:var(--primary-color)}.persistent-code-display{position:absolute;top:15px;right:15px;background:#0003;padding:5px 10px;border-radius:5px;font-size:.9rem;color:#fff}.persistent-code-display strong{letter-spacing:1px}.status-area{text-align:center;flex-grow:1;display:flex;flex-direction:column;justify-content:center}.status-text{font-size:1.5rem;margin-bottom:20px}.waiting-logo{max-width:250px;width:80%;margin:0 auto;display:block;opacity:.8;animation:float 3s ease-in-out infinite}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;height:50vh;margin-top:20px}.option-btn{font-size:1.2rem;font-weight:700;border:none;border-radius:12px;color:#fff;cursor:pointer;padding:10px;transition:opacity .2s,transform .1s;box-shadow:0 4px #0003}.option-btn:active{transform:translateY(4px);box-shadow:none}.option-btn:disabled{opacity:.4;cursor:not-allowed;filter:grayscale(80%)}.btn-A{background-color:var(--btn-a-color)}.btn-B{background-color:var(--btn-b-color)}.btn-C{background-color:var(--btn-c-color)}.btn-D{background-color:var(--btn-d-color)}.text-input-wrapper{margin-top:30px;width:100%}.search-input{width:100%;padding:20px;font-size:1.5rem;border-radius:10px;border:2px solid var(--border-color);background:var(--surface-color);color:var(--text-color);margin-bottom:20px;box-sizing:border-box}.search-input:focus{outline:none;border-color:var(--primary-color);background:var(--background-color)}.btn-submit-text{width:100%;padding:15px;font-size:1.5rem;background-color:var(--success-color);color:#fff;border:none;border-radius:10px;cursor:pointer}.btn-submit-text:disabled{background-color:var(--surface-color);cursor:not-allowed;opacity:.7}