.password-container{position:fixed;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,#ffffff 0%,#764ba2 100%);display:flex;justify-content:center;align-items:center}.password-box{background:rgba(255,255,255,.95);padding:40px;border-radius:15px;box-shadow:0 10px 25px #0003;width:90%;max-width:400px;text-align:center}.password-box h2{color:#2c3e50;margin:0 0 30px;font-size:28px}.input-group{margin-bottom:25px}.input-group input{width:100%;padding:12px 15px;border:2px solid #e0e0e0;border-radius:8px;font-size:16px;transition:all .3s ease;box-sizing:border-box;outline:none}.input-group input:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.password-box button{background:#667eea;color:#fff;border:none;padding:12px 30px;border-radius:8px;font-size:16px;cursor:pointer;transition:all .3s ease;width:100%}.password-box button:hover{background:#764ba2;transform:translateY(-2px)}.password-box button:active{transform:translateY(0)}@media (max-width: 480px){.password-box{padding:30px 20px}}.leaderboard-container{position:fixed;top:0;left:0;width:100%;height:100%;z-index:1000}.leaderboard-overlay{width:100%;height:100%;background-color:#00000080;display:flex;justify-content:center;align-items:center}.leaderboard-modal{background-color:#fff;border-radius:8px;width:90%;max-width:1000px;max-height:90vh;overflow:hidden;box-shadow:0 4px 12px #00000026}.leaderboard-content{padding:20px;overflow-y:auto;max-height:90vh}.leaderboard-header{display:flex;justify-content:center;align-items:center;padding:15px 20px;border-bottom:1px solid #eee;position:relative}.leaderboard-header h2{margin:0;font-size:20px;color:#333;font-weight:700;text-align:center}.close-button{background:none;border:none;font-size:24px;cursor:pointer;color:#999;position:absolute;right:20px;top:50%;transform:translateY(-50%)}.close-button:hover{color:#333}.sort-buttons{display:flex;padding:15px 20px;gap:10px;border-bottom:1px solid #eee;flex-wrap:wrap;background-color:#f9f9f9;justify-content:center}.sort-button,.admin-button{padding:8px 16px;border:none;border-radius:4px;cursor:pointer;font-size:14px;transition:all .2s}.sort-button{background-color:#2196f3;color:#fff}.sort-button:hover{background-color:#0d8bf2}.sort-button.active{background-color:#0d8bf2;color:#fff;font-weight:700}.admin-button{background-color:#757575;color:#fff;margin-left:20px}.admin-button:hover{background-color:#616161}.clear-button{background-color:#f44336;color:#fff}.clear-button:hover{background-color:#d32f2f}.logout-button{background-color:#607d8b;color:#fff}.logout-button:hover{background-color:#455a64}.table-container{padding:20px;overflow-x:auto;margin:0 auto}.leaderboard-table{width:100%;border-collapse:collapse;font-size:13px;margin:0 auto;border:1px solid #eee;border-radius:4px;overflow:hidden}.leaderboard-table th,.leaderboard-table td{padding:8px 10px;text-align:center;border-bottom:1px solid #eee;white-space:nowrap}.leaderboard-table th{background-color:#f5f5f5;font-weight:600;color:#333;border-bottom:2px solid #ddd;font-size:13px}.table-container{padding:15px;overflow-x:auto;margin:0 auto;max-width:100%}.leaderboard-table tr:nth-child(2n){background-color:#f9f9f9}.leaderboard-table tr:hover{background-color:#f0f0f0}.rank-1 td:first-child{color:gold;font-weight:700}.rank-2 td:first-child{color:silver;font-weight:700}.rank-3 td:first-child{color:#cd7f32;font-weight:700}.no-data{text-align:center;padding:20px;color:#999}.record-action-button{padding:5px 10px;margin:0 3px;border:none;border-radius:3px;cursor:pointer;font-size:12px;transition:background-color .2s}.edit-button{background-color:#4caf50;color:#fff}.edit-button:hover{background-color:#388e3c}.delete-button{background-color:#f44336;color:#fff}.delete-button:hover{background-color:#d32f2f}.save-button{background-color:#4caf50;color:#fff}.save-button:hover{background-color:#388e3c}.cancel-button{background-color:#9e9e9e;color:#fff}.cancel-button:hover{background-color:#757575}.edit-username-input{width:100%;padding:5px;border:1px solid #ddd;border-radius:3px;font-size:14px}.pagination{display:flex;justify-content:center;align-items:center;padding:15px;gap:5px;margin-top:10px;margin-bottom:10px}.page-button{padding:8px 12px;border:1px solid #ddd;background-color:#fff;color:#333;cursor:pointer;border-radius:4px;font-size:14px;min-width:40px;text-align:center;transition:all .2s}.page-button:hover{background-color:#f5f5f5}.page-button.active{background-color:#2196f3;color:#fff;border-color:#2196f3}.page-button:disabled{cursor:not-allowed;opacity:.5}.prev-page,.next-page{background-color:#f5f5f5}.page-button:disabled{cursor:not-allowed;opacity:.5;background-color:#90caf9}.password-modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1100}.password-modal{background-color:#fff;padding:20px;border-radius:8px;width:300px;box-shadow:0 4px 12px #00000026}.password-modal h3{margin-top:0;margin-bottom:15px;font-size:18px}.password-modal input{width:100%;padding:8px;margin-bottom:15px;border:1px solid #ddd;border-radius:4px}.error-message{color:#f44336;margin-bottom:15px;font-size:14px}.password-modal-buttons{display:flex;justify-content:flex-end;gap:10px}.password-modal-buttons button{padding:8px 16px;border:none;border-radius:4px;cursor:pointer}.password-modal-buttons button:first-child{background-color:#f5f5f5;color:#333}.password-modal-buttons button:last-child{background-color:#2196f3;color:#fff}.leaderboard-table tbody tr:first-child{background-color:#ffd7000d}.leaderboard-table tbody tr:nth-child(2){background-color:#c0c0c00d}.leaderboard-table tbody tr:nth-child(3){background-color:#cd7f320d}.leaderboard-table tbody tr:nth-child(odd){background-color:#fff}.leaderboard-table tbody tr:nth-child(2n){background-color:#f8f9fa}.operation-cell{white-space:nowrap}.leaderboard-table tbody tr:first-child td:first-child{color:gold;font-weight:700}.leaderboard-table tbody tr:nth-child(2) td:first-child{color:silver;font-weight:700}.leaderboard-table tbody tr:nth-child(3) td:first-child{color:#cd7f32;font-weight:700}.app-container{display:flex;flex-direction:column;width:100%;position:relative}.main-content{flex:1;display:flex;flex-direction:column;padding:20px;width:100%;max-width:1300px;margin:0 auto;box-sizing:border-box;position:relative}.control-panel{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;background-color:#fff;border-radius:4px;box-shadow:0 1px 2px #0000000d;margin-bottom:5px;border:1px solid #e0e0e0;flex-wrap:nowrap}.control-group{display:flex;align-items:center;gap:6px;white-space:nowrap;margin:0}label{font-size:14px;color:#555;white-space:nowrap}select{padding:4px 8px;border:1px solid #ddd;border-radius:4px;font-size:14px;background-color:#fff;min-width:120px;cursor:pointer;outline:none}select:hover{border-color:#aaa}select:focus{border-color:#33a9ff}.typing-stats{display:flex;align-items:center;gap:15px;margin:0}.typing-stats span{font-size:14px;white-space:nowrap;color:#555}.font-size-control{display:flex;align-items:center;gap:6px;white-space:nowrap;margin:0}.font-size-slider{width:50px;cursor:pointer;height:3px;margin:0 4px;vertical-align:middle}.action-buttons{display:flex;gap:8px;margin:0}.action-button{padding:3px 8px;border:none;border-radius:3px;font-size:14px;cursor:pointer;color:#fff;transition:background-color .2s}.reset-button{background-color:#33a9ff}.reset-button:hover{background-color:#2196f3}.sort-button{background-color:#4caf50}.sort-button:hover{background-color:#45a049}.code-display{flex:1;font-family:Consolas,Monaco,Courier New,monospace;font-size:var(--font-size, 16px);line-height:1.5;margin-bottom:5px;border-radius:8px;overflow:hidden;box-shadow:0 2px 10px #00000026;max-height:calc(100vh - 300px)}.code-split-container{display:flex;height:50vh;min-height:300px;max-height:calc(100vh - 280px);gap:20px}.code-container{flex:1;display:flex;overflow:hidden;position:relative;height:100%;border-right:none;border-radius:6px;box-shadow:0 2px 8px #0003;-webkit-user-select:none;user-select:none}.line-numbers{width:40px;background-color:#252526;color:#858585;padding:10px 0;text-align:right;overflow-y:hidden;-webkit-user-select:none;user-select:none;font-family:Consolas,Monaco,Courier New,monospace;font-size:inherit;line-height:1.5;display:flex;flex-direction:column}.line-number{padding:0 8px 0 0;font-size:inherit;line-height:1.5;color:#858585;display:block;height:1.5em;box-sizing:border-box}.source-code{flex:1;margin:0;padding:10px 0 10px 10px;overflow-y:auto;white-space:pre;background-color:#1e1e1e;color:#d4d4d4;border:none;outline:none;resize:none;font-family:Consolas,Monaco,Courier New,monospace;font-size:inherit;line-height:1.5;-webkit-user-select:none;user-select:none;display:flex;flex-direction:column}.code-line{height:1.5em;line-height:1.5;border-bottom:1px solid #444;padding:0;margin:0;position:relative;display:block;box-sizing:border-box}.comment-line{color:#6a9955;font-style:italic;opacity:.8;pointer-events:none}textarea{flex:1;margin:0;padding:10px;overflow-y:auto;white-space:pre;background-color:#f0f0f0;color:#333;border:none;outline:none;resize:none;font-family:Consolas,Monaco,Courier New,monospace;font-size:inherit;line-height:1.5;border-radius:0}.code-container.right-container .line-numbers{background-color:#f0f0f0;border-right:1px solid #ddd;padding:10px 0}.space-char{position:relative;display:inline-block;width:.5em;height:1em}.space-char:before{content:"·";position:absolute;left:0;top:0;color:#858585;opacity:.7;pointer-events:none}.correct{color:#4ec9b0}.error{color:#f44747;text-decoration:none}.pending{color:#d4d4d4}.comment-line{opacity:.7;pointer-events:none}.comment{color:#6a9955;font-style:italic}.time-warning{color:#e74c3c}.login-link{color:#61dafb;cursor:pointer;text-decoration:underline}@media (max-width: 1024px){.control-panel{flex-wrap:wrap;gap:10px}.typing-stats,.font-size-control,.action-buttons{flex-basis:100%;justify-content:center;margin-top:10px}}.upload-container{display:flex;align-items:center;margin-left:10px}.upload-button{background-color:#4caf50;color:#fff;padding:3px 8px;border-radius:3px;cursor:pointer;font-size:14px;transition:background-color .2s}.upload-button:hover{background-color:#45a049}.uploaded-file-name{margin-left:8px;font-size:14px;color:#555;max-width:150px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center}.clear-upload{background:none;border:none;color:#999;font-size:16px;cursor:pointer;margin-left:5px;padding:0 4px}.clear-upload:hover{color:#f44336}.error-space,.extra{background-color:#fcc;border:1px dashed #ff0000;border-radius:2px;position:relative;color:red}.error-space:after{content:"␣";position:absolute;top:-5px;right:-2px;font-size:10px;color:red}#root{width:100%;height:100vh;margin:0;padding:0}.App{display:flex;flex-direction:column;min-height:100vh;background-color:#f5f5f5}h3{font-size:18px;margin:0 0 15px}.app-header{background-color:#2196f3;box-shadow:0 1px 3px #0000001a;padding:0;position:sticky;top:0;z-index:1000;height:60px;width:100%}.header-container{max-width:1300px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;height:100%}.app-title{font-size:1.1rem;font-weight:600;color:#fff;margin:0;letter-spacing:.5px}.title-link{color:#fff;text-decoration:none}.nav-container{display:flex;align-items:center}.main-nav ul{display:flex;list-style:none;margin:0;padding:0;gap:5px}.main-nav a{text-decoration:none;color:#fff;font-weight:400;font-size:.85rem;padding:3px 10px;border-radius:3px;position:relative;transition:color .3s,background-color .3s}.main-nav a:hover{color:#fff;background-color:#fff3}.main-nav a.active{background-color:#ffbd03;color:#fff}.main-nav a.active:hover{background-color:#e0a800}.auth-buttons{display:none}.login-button,.signup-button{padding:8px 18px;border-radius:6px;font-weight:500;cursor:pointer;transition:all .3s;border:none}.login-button{background-color:transparent;color:#4a6cf7;border:1px solid #4a6cf7}.signup-button{background-color:#4a6cf7;color:#fff}.login-button:hover{background-color:#4a6cf71a}.signup-button:hover{background-color:#3853e0}.top-nav-buttons{position:absolute;right:20px;top:10px;display:flex;gap:10px}.nav-button{background-color:#ffbd03;color:#fff;padding:4px 12px;border-radius:4px;border:none;font-size:14px;cursor:pointer;text-decoration:none;display:inline-block}.banner-image{width:100%;height:100px;object-fit:cover;border-radius:12px;margin-bottom:5px;margin-top:5px;box-shadow:0 4px 12px #0000001a;transition:transform .3s ease}.banner-image:hover{transform:scale(1.01)}.main-content{flex:1;padding:0 20px 20px;max-width:1300px;margin:0 auto;width:100%;box-sizing:border-box}.user-select select,.user-select button,.font-size-control select,.font-size-control label,.current-user,.history-stats,.stats span{font-size:14px}.history-file{font-size:16px}.app-footer{background-color:#2e2e2e;color:#fff;padding:15px 0;text-align:center;width:100%;margin-top:auto;position:relative;bottom:0;left:0;right:0}.footer-content{max-width:1300px;margin:0 auto;padding:0 20px}.footer-content p{margin:5px 0;color:#bbb;font-size:14px}:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}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:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}