:root{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-card: rgba(255, 255, 255, .9);--bg-card-hover: rgba(248, 250, 252, 1);--marking-primary: #6366f1;--marking-secondary: #818cf8;--marking-glow: rgba(99, 102, 241, .15);--question-primary: #10b981;--question-secondary: #34d399;--question-glow: rgba(16, 185, 129, .15);--success: #22c55e;--warning: #f59e0b;--danger: #ef4444;--info: #3b82f6;--text-primary: #1e293b;--text-secondary: #64748b;--text-muted: #94a3b8;--border-color: rgba(0, 0, 0, .08);--border-light: rgba(0, 0, 0, .12);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-smooth: .4s cubic-bezier(.4, 0, .2, 1);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px}[data-theme=dark]{--bg-primary: #0f0f12;--bg-secondary: #1a1a22;--bg-card: rgba(30, 30, 40, .8);--bg-card-hover: rgba(40, 40, 55, .9);--marking-glow: rgba(99, 102, 241, .3);--question-glow: rgba(16, 185, 129, .3);--text-primary: #ffffff;--text-secondary: #a1a1aa;--text-muted: #71717a;--border-color: rgba(255, 255, 255, .08);--border-light: rgba(255, 255, 255, .12);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 4px 16px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden;transition:background-color var(--transition-normal),color var(--transition-normal)}#root{min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:600;letter-spacing:-.02em}.app{min-height:100vh;padding:24px;background:var(--bg-primary);transition:background-color var(--transition-normal)}[data-theme=dark] .app{background:radial-gradient(ellipse at top,rgba(99,102,241,.08) 0%,transparent 50%),radial-gradient(ellipse at bottom right,rgba(16,185,129,.05) 0%,transparent 50%),var(--bg-primary)}.header{text-align:center;margin-bottom:40px;animation:fadeInDown .6s ease}.header h1{font-size:clamp(1.8rem,4vw,2.5rem);color:var(--text-primary);margin-bottom:8px}.header p{color:var(--text-secondary);font-size:1rem}.header-controls{display:flex;justify-content:center;align-items:center;gap:12px;margin-top:16px;flex-wrap:wrap}.theme-icon-btn{background:transparent;border:1px solid var(--border-color);cursor:pointer;padding:8px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:all .2s ease}.theme-icon-btn:hover{background-color:var(--bg-card-hover);color:var(--text-primary);border-color:var(--border-light);transform:rotate(15deg)}[data-theme=dark] .theme-icon-btn{color:#fbbf24;border-color:#ffffff26}[data-theme=dark] .theme-icon-btn:hover{background-color:#ffffff1a;color:#fcd34d}.theme-icon-btn svg{width:20px;height:20px;stroke-width:2px}.connection-status{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:var(--radius-xl);background:var(--bg-card);border:1px solid var(--border-color);font-size:.875rem;transition:var(--transition-normal)}.connection-status.connected{border-color:var(--success);box-shadow:0 0 20px #22c55e26}.connection-status.disconnected{border-color:var(--danger);box-shadow:0 0 20px #ef444426}.status-dot{width:8px;height:8px;border-radius:50%;animation:pulse 2s infinite}.status-dot.connected{background:var(--success)}.status-dot.disconnected{background:var(--danger)}.main-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:24px;max-width:1400px;margin:0 auto}.main-content.single{max-width:600px}.queue-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);animation:fadeInUp .6s ease;transition:var(--transition-normal);box-shadow:var(--shadow-sm)}.queue-card:hover{border-color:var(--border-light);transform:translateY(-2px);box-shadow:var(--shadow-md)}.queue-card.marking{border-left:3px solid var(--marking-primary)}.queue-card.question{border-left:3px solid var(--question-primary)}.queue-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.queue-title{display:flex;align-items:center;gap:12px}.queue-icon{width:40px;height:40px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:600;color:#fff}.queue-icon.marking{background:linear-gradient(135deg,var(--marking-primary),var(--marking-secondary))}.queue-icon.question{background:linear-gradient(135deg,var(--question-primary),var(--question-secondary))}.queue-header h2{font-size:1.25rem}.queue-count{font-size:.875rem;color:var(--text-secondary);background:var(--bg-secondary);padding:4px 12px;border-radius:var(--radius-xl);border:1px solid var(--border-color)}.queue-list{list-style:none;display:flex;flex-direction:column;gap:8px;min-height:200px;max-height:400px;overflow-y:auto;padding-right:8px}.queue-list::-webkit-scrollbar{width:4px}.queue-list::-webkit-scrollbar-track{background:var(--bg-secondary);border-radius:4px}.queue-list::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:4px}.queue-item{display:flex;align-items:center;flex-wrap:nowrap;gap:12px;padding:12px 16px;background:var(--bg-secondary);border-radius:var(--radius-md);border:1px solid var(--border-color);transition:all .3s ease;animation:slideIn .3s ease}.queue-item:hover{background:var(--bg-card-hover);border-color:var(--border-light)}.queue-item.is-you{border-color:var(--marking-primary);background:#6366f11a}.queue-item.is-assisting{border-color:var(--info);background:#3b82f614;border-width:1px 1px 1px 4px}.queue-position{width:32px;height:32px;border-radius:50%;background:var(--bg-card);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.875rem;flex-shrink:0;border:1px solid var(--border-color)}.queue-position.first{background:linear-gradient(135deg,#f59e0b,#fbbf24);color:#000;border:none}.queue-position.second{background:linear-gradient(135deg,#94a3b8,#cbd5e1);color:#000;border:none}.queue-position.third{background:linear-gradient(135deg,#cd7f32,#dda15e);color:#000;border:none}.queue-position.assisting{background:var(--info);color:#fff;border:none;animation:pulse 2s infinite}.queue-item-info{flex:1;min-width:80px;overflow:hidden;transition:all .3s ease}.queue-item-name{display:flex;align-items:center;gap:8px;font-weight:500;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.status-badge{font-size:.65rem;font-weight:600;padding:2px 8px;border-radius:var(--radius-xl);text-transform:uppercase;letter-spacing:.02em}.status-badge.assisting{background:var(--info);color:#fff}.status-badge.called{background:var(--warning);color:#fff;animation:pulse 1s infinite}.queue-item.is-called{border-color:var(--warning);background:#f59e0b14;border-width:1px 1px 1px 4px}.queue-position.called{background:var(--warning);color:#fff;border:none;animation:bounce 1s infinite}.queue-badge{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:4px;font-size:.7rem;font-weight:700;color:#fff;margin-left:8px}.queue-badge.marking{background:var(--marking-primary)}.queue-badge.question{background:var(--question-primary)}.join-container{margin-top:24px;padding-top:20px;border-top:1px solid var(--border-color);position:relative;z-index:10;background:var(--bg-card)}.join-tabs{display:flex;gap:12px;margin-bottom:20px}.join-tabs .btn{flex:1}@media(max-height:800px){.queue-list{max-height:300px}}.queue-item-id{font-size:.75rem;color:var(--text-muted)}.queue-item-description{font-size:.8rem;color:var(--text-secondary);font-style:italic;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-height:1.5em;transition:all .3s ease}.queue-item-description.expanded{white-space:normal;overflow:visible;text-overflow:unset;word-break:break-word;overflow-wrap:break-word;max-height:500px}.queue-item.is-expandable{cursor:pointer}.queue-item.is-expandable:hover{background:var(--bg-card-hover)}.queue-item.is-expanded{align-items:flex-start}.queue-item.is-expanded .queue-position{margin-top:4px}.expand-indicator{font-size:.65rem;color:var(--text-muted);margin-left:8px;display:inline-block;transition:transform .3s ease}.queue-item.is-expanded .expand-indicator{transform:rotate(90deg)}.queue-item-followers{font-size:.75rem;color:var(--question-primary);margin-top:4px;padding:4px 8px;background:#10b9811a;border-radius:var(--radius-sm);border-left:3px solid var(--question-primary);max-height:200px;opacity:1;transition:all .3s ease;overflow:hidden}.queue-item-followers.collapsed{max-height:0;opacity:0;margin:0;padding:0;border:none}.followers-label{font-weight:600}.btn-follow{background:linear-gradient(135deg,var(--question-primary),#059669);border:none;color:#fff;padding:6px 14px;font-size:.8rem;font-weight:700;border-radius:20px;cursor:pointer;transition:all .2s ease;white-space:nowrap;width:auto!important;flex-shrink:0;box-shadow:0 2px 8px #10b9814d}.btn-follow:hover{background:linear-gradient(135deg,#059669,var(--question-primary));transform:scale(1.05);box-shadow:0 4px 12px #10b98166}.btn-following{background:#fff;border:2px solid var(--question-primary);color:var(--question-primary);padding:5px 12px;font-size:.75rem;font-weight:600;border-radius:20px;cursor:pointer;transition:all .2s ease;white-space:nowrap;width:auto!important;flex-shrink:0}.btn-following:hover{background:#10b9811a}.follower-badge{display:inline-flex;align-items:center;justify-content:center;background:var(--question-primary);color:#fff;font-size:.65rem;font-weight:700;padding:2px 6px;border-radius:10px;margin-left:6px}.queue-item-time{font-size:.75rem;color:var(--text-muted);white-space:nowrap}.queue-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;color:var(--text-muted);text-align:center}.queue-empty-icon{font-size:2rem;margin-bottom:12px;opacity:.5}.join-form{margin-top:20px;padding-top:20px;border-top:1px solid var(--border-color)}.form-group{margin-bottom:12px}.form-label{display:block;font-size:.875rem;color:var(--text-secondary);margin-bottom:6px}.form-input{width:100%;padding:12px 16px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:1rem;transition:var(--transition-fast)}.form-input:focus{outline:none;border-color:var(--marking-primary);box-shadow:0 0 0 3px var(--marking-glow)}.form-input::placeholder{color:var(--text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:500;cursor:pointer;transition:var(--transition-normal);width:100%}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-marking{background:linear-gradient(135deg,var(--marking-primary),var(--marking-secondary));color:#fff}.btn-marking:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 24px var(--marking-glow)}.btn-question{background:linear-gradient(135deg,var(--question-primary),var(--question-secondary));color:#fff}.btn-question:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 24px var(--question-glow)}.btn-danger{background:linear-gradient(135deg,var(--danger),#f87171);color:#fff}.btn-danger:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 24px #ef44444d}.btn-secondary{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary)}.btn-secondary:hover:not(:disabled){background:var(--bg-card-hover);border-color:var(--border-light)}.btn-sm{padding:8px 16px;font-size:.875rem}.btn-icon{padding:8px;width:36px;height:36px;border-radius:var(--radius-sm)}.ta-controls{display:flex;gap:8px;margin-top:16px}.ta-controls .btn{flex:1}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.login-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:40px;width:100%;max-width:400px;box-shadow:var(--shadow-lg);animation:fadeInUp .6s ease}.login-card h1{font-size:1.5rem;margin-bottom:8px;text-align:center}.login-card p{color:var(--text-secondary);text-align:center;margin-bottom:24px}.login-error{background:#ef44441a;border:1px solid var(--danger);color:var(--danger);padding:12px;border-radius:var(--radius-md);margin-bottom:16px;font-size:.875rem;text-align:center}.nav-link{display:inline-flex;align-items:center;gap:6px;color:var(--text-secondary);text-decoration:none;font-size:.875rem;padding:8px 16px;border-radius:var(--radius-md);transition:var(--transition-fast)}.nav-link:hover{color:var(--text-primary);background:var(--bg-card)}.toast-container{position:fixed;top:80px;left:24px;z-index:1000;display:flex;flex-direction:column;gap:8px}.toast{padding:16px 24px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);box-shadow:var(--shadow-lg);animation:slideInLeft .3s ease;max-width:360px;cursor:pointer}.toast.exiting{animation:slideOutLeft .3s ease forwards}@keyframes slideOutLeft{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(-100%)}}.toast.success{border-color:var(--success)}.toast.warning{border-color:var(--warning)}.toast.error{border-color:var(--danger)}.toast.info{border-color:var(--info)}.toast-header{display:flex;align-items:center;gap:8px;margin-bottom:4px;font-weight:600}.toast-message{color:var(--text-secondary);font-size:.875rem}.your-position{background:linear-gradient(135deg,var(--marking-primary),var(--marking-secondary));padding:16px 24px;border-radius:var(--radius-md);margin-bottom:16px;text-align:center;color:#fff;animation:pulse-glow 2s infinite}.your-position.is-called{background:linear-gradient(135deg,var(--warning),#fbbf24);animation:pulse-glow-warning 2s infinite}@keyframes pulse-glow-warning{0%,to{box-shadow:0 0 20px #f59e0b4d}50%{box-shadow:0 0 40px #f59e0b99}}.your-position.is-assisting{background:linear-gradient(135deg,var(--info),#60a5fa);animation:pulse-glow-info 2s infinite}@keyframes pulse-glow-info{0%,to{box-shadow:0 0 20px #3b82f64d}50%{box-shadow:0 0 40px #3b82f699}}.your-position h3{font-size:1.1rem;margin-bottom:4px}.your-position p{font-size:.875rem;opacity:.9}.your-position .position-number{font-size:2rem;font-weight:700}.leave-btn-container{margin-top:12px}.leave-btn-container .btn{background:#fff3;border:1px solid rgba(255,255,255,.3)}.leave-btn-container .btn:hover{background:#ffffff4d}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px}.page-header-left{display:flex;align-items:center;gap:16px}.back-link{display:flex;align-items:center;gap:6px;color:var(--text-secondary);text-decoration:none;font-size:.875rem;padding:8px 12px;border-radius:var(--radius-md);transition:var(--transition-fast);background:var(--bg-card);border:1px solid var(--border-color)}.back-link:hover{color:var(--text-primary);border-color:var(--border-light)}.home-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center}.home-title{font-size:clamp(2rem,5vw,3rem);margin-bottom:8px;color:var(--text-primary)}.home-subtitle{color:var(--text-secondary);font-size:1.1rem;margin-bottom:48px}.home-buttons{display:flex;flex-direction:column;gap:16px;width:100%;max-width:320px}.home-btn{padding:20px 32px;font-size:1.1rem;border-radius:var(--radius-lg);text-decoration:none;display:flex;align-items:center;justify-content:center;gap:12px;transition:var(--transition-normal)}.home-btn.student{background:linear-gradient(135deg,var(--marking-primary),var(--marking-secondary));color:#fff}.home-btn.student:hover{transform:translateY(-3px);box-shadow:0 12px 32px var(--marking-glow)}.home-btn.ta{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary)}.home-btn.ta:hover{transform:translateY(-3px);border-color:var(--border-light);box-shadow:var(--shadow-md)}.home-footer{margin-top:48px;display:flex;align-items:center;gap:16px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-10px)}to{opacity:1;transform:translate(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.7;transform:scale(1.1)}}@keyframes pulse-glow{0%,to{box-shadow:0 0 20px var(--marking-glow)}50%{box-shadow:0 0 40px var(--marking-glow)}}@media(max-width:768px){.app{padding:16px}.main-content{grid-template-columns:1fr}.queue-card{padding:20px}.login-card{padding:24px}.home-buttons{max-width:100%}}.spinner{width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.ta-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;background:linear-gradient(135deg,var(--warning),#fbbf24);color:#000;font-size:.75rem;font-weight:600;border-radius:var(--radius-xl);margin-left:8px}.logout-btn{padding:8px 16px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-secondary);font-size:.875rem;cursor:pointer;transition:var(--transition-fast)}.logout-btn:hover{background:var(--bg-card-hover);color:var(--danger);border-color:var(--danger)}.full-window-alert{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000000e6;z-index:2000;display:flex;flex-direction:column;align-items:center;justify-content:center;animation:fadeIn .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.alert-content{background:var(--bg-card);padding:40px;border-radius:var(--radius-lg);border:2px solid var(--marking-primary);text-align:center;max-width:90%;width:500px;box-shadow:0 0 50px var(--marking-glow);animation:pulse-border 2s infinite}.alert-icon{font-size:4rem;margin-bottom:24px;display:block;animation:bounce 1s infinite}.alert-title{font-size:2rem;margin-bottom:16px;color:var(--text-primary)}.alert-message{font-size:1.2rem;color:var(--text-secondary);margin-bottom:32px}.alert-btn{background:linear-gradient(135deg,var(--marking-primary),var(--marking-secondary));color:#fff;padding:16px 32px;font-size:1.1rem;border-radius:var(--radius-md);border:none;cursor:pointer;width:100%;transition:transform .2s}.alert-btn:hover{transform:scale(1.02)}.success-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;z-index:2000;display:flex;align-items:center;justify-content:center;background:#000000b3;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);animation:fadeIn .3s ease}.success-content{background:var(--bg-card);padding:48px;border-radius:var(--radius-xl);text-align:center;box-shadow:0 20px 50px #0000004d;animation:scaleIn .4s cubic-bezier(.175,.885,.32,1.275)}.checkmark-circle{width:100px;height:100px;position:relative;display:inline-block;vertical-align:top;margin-bottom:24px}.checkmark-circle .background{width:100px;height:100px;border-radius:50%;background:var(--success);position:absolute}.checkmark-circle .checkmark{border-radius:5px}.checkmark-circle .checkmark.draw:after{animation-delay:.1s;animation-duration:1s;animation-timing-function:ease;animation-name:checkmark;transform:scaleX(-1) rotate(135deg);animation-fill-mode:forwards}.checkmark-circle .checkmark:after{opacity:1;height:50px;width:25px;transform-origin:left top;border-right:10px solid white;border-top:10px solid white;border-radius:4px;content:"";left:20px;top:50px;position:absolute}.success-title{font-size:1.8rem;color:var(--text-primary);margin-bottom:8px}.success-message{color:var(--text-secondary);font-size:1.1rem}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse-border{0%{box-shadow:0 0 #6366f1b3}70%{box-shadow:0 0 0 10px #6366f100}to{box-shadow:0 0 #6366f100}}@keyframes scaleIn{0%{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}@keyframes checkmark{0%{height:0;width:0;opacity:1}20%{height:0;width:25px;opacity:1}40%{height:50px;width:25px;opacity:1}to{height:50px;width:25px;opacity:1}}