:root{--bg-main:#090a0f;--bg-surface:#11131c;--bg-surface-hover:#1b1e2a;--border-color:#1f2335;--border-color-focus:#7c3aed;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--color-primary:#8b5cf6;--color-primary-hover:#a78bfa;--color-primary-glow:#8b5cf626;--color-success:#10b981;--color-success-glow:#10b98126;--color-warning:#f59e0b;--color-warning-glow:#f59e0b26;--color-danger:#ef4444;--color-danger-glow:#ef444426;--color-info:#3b82f6;--color-info-glow:#3b82f626;--font-sans:"Inter", system-ui, -apple-system, sans-serif;--font-mono:"JetBrains Mono", "Fira Code", ui-monospace, monospace;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-full:9999px;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000004d, 0 4px 6px -2px #0003;--transition-fast:.15s cubic-bezier(.4, 0, .2, 1);--transition-normal:.25s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-main);color:var(--text-primary);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5;overflow-x:hidden}#root{flex-direction:column;min-height:100vh;display:flex}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-main)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-2{gap:8px}.gap-4{gap:16px}.gap-6{gap:24px}.grid{display:grid}.flex-1{flex:1}.btn{font-size:14px;font-weight:500;font-family:var(--font-sans);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:8px 16px;text-decoration:none;display:inline-flex}.btn-primary{background-color:var(--color-primary);color:var(--text-primary);box-shadow:0 0 12px var(--color-primary-glow)}.btn-primary:hover{background-color:var(--color-primary-hover);transform:translateY(-1px);box-shadow:0 0 20px #8b5cf64d}.btn-secondary{background-color:var(--bg-surface);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background-color:var(--bg-surface-hover);border-color:var(--text-muted)}.btn-danger{background-color:var(--color-danger);color:#fff;box-shadow:0 0 12px var(--color-danger-glow)}.btn-danger:hover{background-color:#f87171;transform:translateY(-1px)}.btn-sm{border-radius:var(--radius-sm);padding:6px 12px;font-size:13px}.card{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);transition:border-color var(--transition-fast), transform var(--transition-fast);padding:24px}.card-hover:hover{border-color:var(--text-muted);transform:translateY(-2px)}.form-group{flex-direction:column;gap:6px;width:100%;margin-bottom:16px;display:flex}.form-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;font-size:13px;font-weight:600}.form-input{background-color:var(--bg-main);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:14px;font-family:var(--font-sans);transition:all var(--transition-fast);outline:none;padding:10px 14px}.form-input:focus{border-color:var(--border-color-focus);box-shadow:0 0 0 3px var(--color-primary-glow)}h1{letter-spacing:-.02em;color:var(--text-primary);font-size:32px;font-weight:700}h2{letter-spacing:-.01em;color:var(--text-primary);font-size:24px;font-weight:600}h3{color:var(--text-primary);font-size:18px;font-weight:600}.text-muted{color:var(--text-muted)}.text-secondary{color:var(--text-secondary)}.badge{border-radius:var(--radius-full);text-transform:capitalize;align-items:center;padding:4px 10px;font-size:12px;font-weight:600;display:inline-flex}.badge-pending{background-color:var(--color-warning-glow);color:var(--color-warning);border:1px solid #f59e0b4d}.badge-running{background-color:var(--color-info-glow);color:var(--color-info);border:1px solid #3b82f64d}.badge-accepted{background-color:var(--color-success-glow);color:var(--color-success);border:1px solid #10b9814d}.badge-wrong_answer,.badge-tle,.badge-compile_error,.badge-runtime_error{background-color:var(--color-danger-glow);color:var(--color-danger);border:1px solid #ef44444d}.fade-in{animation:fadeIn var(--transition-normal) forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.navbar-container{background-color:var(--bg-surface);border-bottom:1px solid var(--border-color);z-index:100;-webkit-backdrop-filter:blur(12px);position:sticky;top:0}.navbar-content{justify-content:space-between;align-items:center;max-width:1280px;margin:0 auto;padding:14px 24px;display:flex}.navbar-brand{color:var(--text-primary);align-items:center;gap:10px;font-size:18px;font-weight:700;text-decoration:none;display:flex}.navbar-logo-icon{color:var(--color-primary)}.brand-accent{color:var(--color-primary);font-weight:800}.navbar-actions{align-items:center;gap:20px;display:flex}.navbar-link{color:var(--text-secondary);transition:color var(--transition-fast);align-items:center;gap:8px;font-size:14px;font-weight:500;text-decoration:none;display:flex}.navbar-link:hover,.navbar-link.active{color:var(--color-primary-hover)}.navbar-user-info{border-left:1px solid var(--border-color);align-items:center;gap:8px;padding-left:20px;display:flex}.navbar-username{color:var(--text-primary);font-size:14px;font-weight:600}.role-badge{border-radius:var(--radius-full);text-transform:uppercase;padding:2px 8px;font-size:11px;font-weight:700}.role-admin{background-color:var(--color-danger-glow);color:var(--color-danger);border:1px solid #ef444433}.role-user{background-color:var(--color-info-glow);color:var(--color-info);border:1px solid #3b82f633}.auth-container{flex:1;justify-content:center;align-items:center;padding:40px 20px;display:flex}.auth-card{flex-direction:column;gap:24px;width:100%;max-width:420px;display:flex}.auth-header{text-align:center;flex-direction:column;gap:6px;display:flex}.auth-form{flex-direction:column;gap:16px;display:flex}.input-with-icon{align-items:center;display:flex;position:relative}.input-icon{color:var(--text-muted);pointer-events:none;position:absolute;left:14px}.input-with-icon .form-input{width:100%;padding-left:42px}.select-input{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");background-position:right 14px center;background-repeat:no-repeat;background-size:16px;padding-right:40px}.btn-block{width:100%;padding:12px;font-size:15px;font-weight:600}.auth-footer{text-align:center}.auth-link{color:var(--color-primary);font-weight:600;text-decoration:none}.auth-link:hover{color:var(--color-primary-hover);text-decoration:underline}.alert{border-radius:var(--radius-md);align-items:flex-start;gap:10px;padding:12px 16px;font-size:14px;line-height:1.4;display:flex}.alert-error{background-color:var(--color-danger-glow);color:var(--color-danger);border:1px solid #ef444433}.animate-spin{animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.text-xs{font-size:12px}.text-sm{font-size:14px}.mt-1{margin-top:4px}.dashboard-container{flex:1;padding:40px 24px}.dashboard-header{margin-bottom:32px}.mb-6{margin-bottom:24px}.mb-4{margin-bottom:16px}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:60px 40px;display:flex}.empty-state p{max-width:400px}.tests-grid{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}.test-card{flex-direction:column;justify-content:space-between;height:220px;display:flex}.test-title{color:var(--text-primary);margin-bottom:8px;font-size:20px;font-weight:600}.test-desc{-webkit-line-clamp:3;-webkit-box-orient:vertical;font-size:14px;line-height:1.5;display:-webkit-box;overflow:hidden}.test-card-footer{border-top:1px solid var(--border-color);margin-top:auto;padding-top:16px}.test-detail-container{flex:1;padding:40px 24px}.test-layout{grid-template-columns:320px 1fr;align-items:start;gap:32px;display:grid}@media (width<=768px){.test-layout{grid-template-columns:1fr}}.contest-title{margin-bottom:12px;font-size:24px;font-weight:700}.contest-desc{font-size:14px;line-height:1.5}.contest-meta{flex-direction:column;gap:12px;display:flex}.border-t{border-top:1px solid var(--border-color)}.pt-4{padding-top:16px}.mt-4{margin-top:16px}.test-questions-panel{flex-direction:column;gap:16px;display:flex}.questions-list{flex-direction:column;gap:12px;display:flex}.question-row{flex-direction:row;justify-content:space-between;align-items:center;padding:16px 24px;text-decoration:none;display:flex}.question-index{background-color:var(--border-color);width:32px;height:32px;color:var(--text-primary);border-radius:var(--radius-full);font-size:14px;font-weight:700}.question-title{margin-bottom:2px;font-size:16px;font-weight:600}.question-desc{white-space:nowrap;text-overflow:ellipsis;max-width:450px;line-height:1.4;overflow:hidden}.workspace-container{flex-direction:column;height:calc(100vh - 61px);display:flex;overflow:hidden}.workspace-header{background-color:var(--bg-surface);border-bottom:1px solid var(--border-color);padding:10px 24px}.workspace-back{border-radius:var(--radius-md);border:1px solid var(--border-color);width:32px;height:32px;color:var(--text-secondary);transition:all var(--transition-fast);justify-content:center;align-items:center;text-decoration:none;display:flex}.workspace-back:hover{background-color:var(--bg-surface-hover);color:var(--text-primary)}.workspace-title{font-size:16px;font-weight:600}.language-tabs{background-color:var(--bg-main);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:2px;display:flex}.lang-tab-btn{color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);transition:all var(--transition-fast);background:0 0;border:none;padding:4px 12px;font-size:13px;font-weight:600}.lang-tab-btn:hover{color:var(--text-primary)}.lang-tab-btn.active{background-color:var(--bg-surface);color:var(--color-primary-hover);box-shadow:var(--shadow-sm)}.workspace-body{flex:1;grid-template-columns:1fr 1fr;height:100%;display:grid;overflow:hidden}.workspace-panel{flex-direction:column;height:100%;display:flex;overflow:hidden}.description-panel{border-right:1px solid var(--border-color)}.panel-header{background-color:var(--bg-surface);border-bottom:1px solid var(--border-color);padding:12px 24px}.panel-header h3{text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);font-size:14px;font-weight:600}.scrollable{overflow-y:auto}.panel-content{flex:1;padding:24px}.question-content-html{color:var(--text-primary);font-size:15px;line-height:1.6}.example-case{background-color:var(--bg-main);border-radius:var(--radius-md);padding:16px}.example-case-header{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:10px;font-size:12px;font-weight:700}.io-block{font-family:var(--font-mono);font-size:13px}.io-label{color:var(--text-secondary);margin-right:8px;font-weight:600}.io-block pre{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);white-space:pre-wrap;word-break:break-all;margin-top:4px;padding:8px 12px}.editor-panel{flex-direction:column;height:100%;display:flex}.code-editor-wrapper{background-color:#1e1e1e;flex:1;min-height:0}.console-panel{border-top:1px solid var(--border-color);background-color:var(--bg-surface);flex-direction:column;height:250px;display:flex}.console-header{border-bottom:1px solid var(--border-color);text-transform:uppercase;color:var(--text-secondary);padding:10px 24px;font-size:12px;font-weight:600}.console-content{flex:1;padding:16px 24px}.console-placeholder{color:var(--text-muted);text-align:center;padding-top:30px;font-size:14px}.status-accepted{background-color:var(--color-success-glow);color:var(--color-success);border:1px solid #10b98133}.status-wrong_answer,.status-tle,.status-compile_error,.status-runtime_error{background-color:var(--color-danger-glow);color:var(--color-danger);border:1px solid #ef444433}.status-pending,.status-running{background-color:var(--color-info-glow);color:var(--color-info);border:1px solid #3b82f633}.console-status-badge{align-items:center;gap:6px;padding:2px 10px;font-size:11px;display:flex}.result-success-alert{background-color:var(--color-success-glow);border-radius:var(--radius-md);border:1px solid #10b98133;padding:16px}.result-failure-alert{background-color:var(--color-danger-glow);border-radius:var(--radius-md);border:1px solid #ef444433;padding:16px}.admin-container{flex:1;padding:40px 24px}.admin-layout{grid-template-columns:240px 1fr;align-items:start;gap:32px;display:grid}@media (width<=768px){.admin-layout{grid-template-columns:1fr}}.admin-tabs-sidebar{flex-direction:column;gap:6px;padding:12px;display:flex}.admin-tab-link{border-radius:var(--radius-md);color:var(--text-secondary);cursor:pointer;text-align:left;transition:all var(--transition-fast);background:0 0;border:none;align-items:center;gap:12px;padding:12px 16px;font-size:14px;font-weight:500;display:flex}.admin-tab-link:hover:not(:disabled){background-color:var(--bg-surface-hover);color:var(--text-primary)}.admin-tab-link.active{background-color:var(--color-primary-glow);color:var(--color-primary-hover);font-weight:600}.admin-tab-link:disabled{opacity:.5;cursor:not-allowed}.admin-forms-panel{padding:32px}.text-area-input{font-family:var(--font-sans);resize:vertical}.flex-row{flex-direction:row}.cursor-pointer{cursor:pointer}.select-none{-webkit-user-select:none;user-select:none}.alert-success{background-color:var(--color-success-glow);color:var(--color-success);border:1px solid #10b98133}.mx-auto{margin-left:auto;margin-right:auto}.max-w-md{max-width:448px}.py-12{padding-top:48px;padding-bottom:48px}.text-center{text-align:center}.h-screen{height:100vh}.bg-main{background-color:var(--bg-main)}