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var(--transition-fast)}.textarea:focus{outline:none;border-color:var(--teacher-accent);background:color-mix(in srgb,var(--teacher-accent) 4%,var(--teacher-surface));box-shadow:0 0 0 3px rgba(var(--teacher-accent-rgb),.12)}.textarea::placeholder{color:var(--teacher-text-faint)}.textarea:hover{border-color:rgba(var(--teacher-fg-rgb),.16);background:rgba(var(--teacher-fg-rgb),.045)}.form-item{margin-bottom:var(--space-4)}.form-label{display:block;font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-secondary);margin-bottom:var(--space-2)}.form-row{display:flex;gap:var(--space-3)}.form-row .form-item{flex:1}.select{position:relative;width:100%}.select-trigger{display:flex;align-items:center;justify-content:space-between;width:100%;height:40px;padding:0 14px;color:rgb(var(--teacher-fg-rgb));font-size:13px;background:rgba(var(--teacher-fg-rgb),.035);border:1px solid rgba(var(--teacher-fg-rgb),.09);border-radius:9px;box-shadow:none;cursor:pointer;transition:all var(--transition-fast)}.select-trigger:hover{border-color:rgba(var(--teacher-fg-rgb),.16);background:rgba(var(--teacher-fg-rgb),.045)}.select-trigger.has-tags{height:auto;min-height:40px;padding:6px 10px 6px 8px;gap:6px}.select-trigger.active{border-color:var(--teacher-accent);background:color-mix(in srgb,var(--teacher-accent) 4%,var(--teacher-surface));box-shadow:0 0 0 3px rgba(var(--teacher-accent-rgb),.12)}.select-value{overflow:hidden;color:rgb(var(--teacher-fg-rgb));text-overflow:ellipsis;white-space:nowrap}.select-placeholder{color:var(--teacher-text-faint)}.select-arrow{flex:0 0 auto;color:var(--teacher-text-muted);transition:transform var(--transition-fast)}.select-trigger.active .select-arrow{transform:rotate(180deg)}.select-dropdown{position:absolute;top:calc(100% + 4px);left:0;right:0;display:flex;flex-direction:column;background:color-mix(in srgb,var(--teacher-surface-strong) 94%,transparent);border:1px solid rgba(var(--teacher-fg-rgb),.09);border-radius:13px;box-shadow:0 18px 45px #0003;-webkit-backdrop-filter:blur(20px) saturate(145%);backdrop-filter:blur(20px) saturate(145%);z-index:100;max-height:240px;overflow:hidden;animation:slideUp .15s ease;padding:6px}.select-dropdown.drop-up{top:auto;bottom:calc(100% + 4px);transform-origin:bottom center}.select-search{display:flex;flex:0 0 auto;align-items:center;gap:8px;margin-bottom:4px;padding:0 8px;height:34px;border:1px solid rgba(var(--teacher-fg-rgb),.08);border-radius:9px;background:rgba(var(--teacher-fg-rgb),.04)}.select-search-icon{flex:0 0 auto;color:var(--teacher-text-muted)}.select-search-input{width:100%;min-width:0;height:100%;padding:0;color:rgb(var(--teacher-fg-rgb));border:0;outline:none;background:transparent;font-size:12px}.select-search-input::placeholder{color:var(--teacher-text-faint)}.select-options{min-height:0;overflow-y:auto;flex:1}.select-dropdown .select-option{border-radius:var(--radius-md)}.select-option{display:flex;align-items:center;gap:8px;min-height:34px;padding:7px 10px;color:var(--teacher-text-secondary);border-radius:9px;font-size:12px;cursor:pointer;transition:background var(--transition-fast),color var(--transition-fast)}.select-option>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.select-option:hover{color:rgb(var(--teacher-fg-rgb));background:rgba(var(--teacher-fg-rgb),.07)}.select-option.selected{color:var(--teacher-accent);background:transparent}.select-option.selected:hover{background:rgba(var(--teacher-fg-rgb),.07)}.select-option-check{margin-left:auto;color:var(--teacher-accent)}.select-dropdown::-webkit-scrollbar,.select-options::-webkit-scrollbar{width:8px}.select-dropdown::-webkit-scrollbar-button,.select-options::-webkit-scrollbar-button{display:none;width:0;height:0}.select-dropdown::-webkit-scrollbar-track,.select-options::-webkit-scrollbar-track{margin:8px 0;background:transparent}.select-dropdown::-webkit-scrollbar-thumb,.select-options::-webkit-scrollbar-thumb{border:1px solid transparent;border-radius:10px;background:#a1a1aa57;background-clip:padding-box}.select-tags{display:flex;min-width:0;flex:1;flex-wrap:wrap;gap:5px;padding:0}.select-tags .select-tag{max-width:100%;padding:3px 8px;color:var(--teacher-text-primary);border-color:rgba(var(--teacher-fg-rgb),.1);background:rgba(var(--teacher-fg-rgb),.06);font-size:11px;font-weight:400}.select-tags .select-tag-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.select-tags .tag-close{flex:0 0 auto;color:var(--teacher-text-secondary);font-size:13px;line-height:1}.select-tags .tag-close:hover{color:rgb(var(--teacher-fg-rgb))}.tag{display:inline-flex;align-items:center;gap:var(--space-1);padding:2px var(--space-2);font-size:var(--text-xs);font-weight:var(--font-medium);border-radius:var(--radius-full);background:var(--gray-100);color:var(--text-secondary);border:1px solid transparent}.tag-primary{background:var(--teacher-accent-soft);color:var(--teacher-accent);border-color:var(--teacher-accent-border)}.tag-success{background:var(--accent-50);color:var(--accent-700)}.tag-warning{background:#fffbeb;color:#b45309}.tag-danger{background:#fef2f2;color:#b91c1c}.tag-outline{background:transparent;border-color:var(--border-medium)}.tag-close{cursor:pointer;opacity:.6;transition:opacity var(--transition-fast)}.tag-close:hover{opacity:1}.badge{position:relative;display:inline-flex}.badge-count{position:absolute;top:-6px;right:-6px;min-width:18px;height:18px;padding:0 5px;font-size:11px;font-weight:var(--font-semibold);color:#fff;background:var(--danger);border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;border:2px solid var(--bg-primary)}.badge-success .badge-count{background:var(--accent-500)}.avatar{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:var(--radius-full);background:var(--gradient-cta);color:#fff;font-size:var(--text-sm);font-weight:var(--font-semibold);line-height:1;letter-spacing:0;overflow:hidden;box-shadow:inset 0 -2px 4px #0000001f}.avatar-sm{width:28px;height:28px;font-size:var(--text-xs)}.avatar-lg{width:48px;height:48px;font-size:var(--text-lg)}.dialog-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0206178c;backdrop-filter:blur(10px) saturate(120%);-webkit-backdrop-filter:blur(10px) saturate(120%);z-index:1000;display:flex;align-items:center;justify-content:center;animation:fadeIn var(--transition-base)}.dialog{background:var(--bg-primary);border:1px solid rgba(var(--teacher-fg-rgb),.6);border-radius:var(--radius-2xl);box-shadow:0 32px 80px -12px #02061766,0 8px 24px #0206172e;max-width:90vw;max-height:90vh;display:flex;flex-direction:column;animation:dialogIn .28s cubic-bezier(.22,1,.36,1)}@keyframes dialogIn{0%{opacity:0;transform:translateY(16px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}.dialog-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-5) var(--space-6);border-bottom:1px solid var(--border-light)}.dialog-title{font-size:var(--text-lg);font-weight:var(--font-semibold)}.dialog-close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-md);color:var(--text-tertiary);cursor:pointer;transition:all var(--transition-fast)}.dialog-close:hover{background:var(--bg-tertiary);color:var(--text-primary)}.dialog-body{padding:var(--space-6);overflow-y:auto;flex:1}.dialog-footer{display:flex;justify-content:flex-end;gap:var(--space-3);padding:var(--space-4) var(--space-6);border-top:1px solid var(--border-light)}.table-wrapper{background:var(--bg-primary);border-radius:var(--radius-lg);border:1px solid var(--border-light);overflow:hidden}.table{width:100%;border-collapse:collapse}.table th{padding:var(--space-3) var(--space-4);font-size:var(--text-xs);font-weight:var(--font-semibold);text-transform:uppercase;letter-spacing:.5px;color:var(--text-tertiary);background:var(--bg-secondary);border-bottom:1px solid var(--border-light);text-align:left}.table td{padding:var(--space-3) var(--space-4);font-size:var(--text-sm);border-bottom:1px solid var(--border-light)}.table tbody tr{transition:background var(--transition-fast);cursor:pointer}.table tbody tr:hover{background:var(--bg-secondary)}.table tbody tr:last-child td{border-bottom:none}.tabs{display:flex;flex-direction:column;height:100%}.tabs-header{display:flex;border-bottom:1px solid var(--border-light);gap:var(--space-1)}.tab-item{padding:var(--space-3) var(--space-4);font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-tertiary);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;transition:all var(--transition-fast);display:flex;align-items:center;gap:var(--space-2)}.tab-item:hover{color:var(--text-primary)}.tab-item.active{color:var(--teacher-accent);border-bottom-color:var(--teacher-accent)}.tabs-content{flex:1;overflow:hidden}.tab-pane{height:100%;overflow-y:auto}.steps{display:flex;align-items:center;justify-content:center;gap:var(--space-8);margin-bottom:var(--space-6)}.step{display:flex;align-items:center;gap:var(--space-2)}.step-icon{width:28px;height:28px;border-radius:var(--radius-full);background:var(--gray-200);color:var(--text-tertiary);display:flex;align-items:center;justify-content:center;font-size:var(--text-sm);font-weight:var(--font-semibold);transition:all var(--transition-fast)}.step.active .step-icon{background:var(--primary-600);color:#fff}.step.completed .step-icon{background:var(--accent-500);color:#fff}.step-title{font-size:var(--text-sm);color:var(--text-tertiary)}.step.active .step-title{color:var(--text-primary);font-weight:var(--font-medium)}.step-connector{width:40px;height:2px;background:var(--gray-200)}.radio-group{display:inline-flex;background:var(--bg-tertiary);border-radius:var(--radius-lg);padding:3px;gap:2px}.radio-item{padding:var(--space-2) var(--space-4);font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-secondary);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}.radio-item:hover{color:var(--text-primary)}.radio-item.active{background:var(--bg-primary);color:var(--teacher-accent);font-weight:var(--font-semibold);box-shadow:var(--shadow-sm)}.checkbox{display:inline-flex;align-items:center;gap:var(--space-2);padding:0;border:0;background:transparent;color:inherit;font:inherit;cursor:pointer}.checkbox-input{width:16px;height:16px;border:1.5px solid var(--border-medium);border-radius:4px;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast)}.checkbox.checked .checkbox-input{background:var(--teacher-accent);border-color:var(--teacher-accent)}.checkbox-input svg{width:10px;height:10px;color:#fff}.switch{position:relative;width:44px;height:24px;background:var(--gray-300);border-radius:var(--radius-full);cursor:pointer;transition:background var(--transition-fast)}.switch.active{background:var(--teacher-accent)}.switch-handle{position:absolute;top:2px;left:2px;width:20px;height:20px;background:#fff;border-radius:50%;box-shadow:var(--shadow-sm);transition:transform var(--transition-fast)}.switch.active .switch-handle{transform:translate(20px)}.slider{position:relative;height:5px;background:#94a3b859;border-radius:var(--radius-full);cursor:pointer}.slider-track{position:absolute;left:0;top:0;height:100%;background:linear-gradient(90deg,var(--teacher-accent),color-mix(in srgb,var(--teacher-accent) 62%,#fff));border-radius:var(--radius-full)}.slider-handle{position:absolute;top:50%;width:15px;height:15px;background:#fff;border:2px solid var(--teacher-accent);border-radius:50%;transform:translate(-50%,-50%);cursor:grab;box-shadow:0 1px 4px #02061759;transition:box-shadow var(--transition-fast),transform var(--transition-fast)}.slider-handle:hover{transform:translate(-50%,-50%) scale(1.15);box-shadow:0 0 0 5px rgba(var(--teacher-accent-rgb),.18),0 2px 6px #02061759}.slider:active .slider-handle{cursor:grabbing;box-shadow:0 0 0 7px rgba(var(--teacher-accent-rgb),.22),0 2px 6px #02061759}.progress{height:6px;background:#94a3b840;border-radius:var(--radius-full);overflow:hidden}.progress-bar{position:relative;height:100%;background:linear-gradient(90deg,var(--teacher-accent),color-mix(in srgb,var(--teacher-accent) 62%,#fff));border-radius:var(--radius-full);transition:width var(--transition-base);overflow:hidden}.progress-bar:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(100deg,transparent 30%,rgba(var(--teacher-fg-rgb),.35) 50%,transparent 70%);animation:progressSheen 2.2s ease-in-out infinite}@keyframes progressSheen{0%{transform:translate(-100%)}to{transform:translate(100%)}}.dropdown{position:relative}.dropdown-menu{position:absolute;top:calc(100% + 4px);right:0;min-width:160px;background:var(--bg-primary);border:1px solid var(--border-light);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);z-index:100;animation:slideUp .15s ease;overflow:hidden;padding:4px}.dropdown-menu .dropdown-item{border-radius:var(--radius-md)}.dropdown-item{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);font-size:var(--text-sm);cursor:pointer;transition:background var(--transition-fast)}.dropdown-item:hover{background:var(--bg-secondary)}.dropdown-item.danger{color:var(--danger)}.dropdown-divider{height:1px;background:var(--border-light);margin:var(--space-1) 0}.empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-10) var(--space-6);color:var(--text-tertiary)}.empty-icon{font-size:40px;margin-bottom:var(--space-3);opacity:.4}.empty-text{font-size:var(--text-sm)}.timeline{position:relative;padding-left:var(--space-6)}.timeline:before{content:"";position:absolute;left:5px;top:0;bottom:0;width:2px;background:var(--border-light)}.timeline-item{position:relative;padding-bottom:var(--space-5)}.timeline-item:before{content:"";position:absolute;left:calc(-1 * var(--space-6) + 0px);top:6px;width:12px;height:12px;border-radius:50%;background:var(--bg-primary);border:2px solid var(--border-medium)}.timeline-item.primary:before{border-color:var(--primary-600);background:var(--primary-100)}.timeline-item.success:before{border-color:var(--accent-500);background:var(--accent-100)}.timeline-time{font-size:var(--text-xs);color:var(--text-tertiary);margin-bottom:var(--space-1)}.loading-mask{position:absolute;top:0;right:0;bottom:0;left:0;background:rgba(var(--teacher-fg-rgb),.7);display:flex;align-items:center;justify-content:center;z-index:10}.loading-spinner{width:24px;height:24px;border:2px solid var(--primary-200);border-top-color:var(--primary-600);border-radius:50%;animation:spin .8s linear infinite}.message-container{position:fixed;top:var(--space-5);left:50%;transform:translate(-50%);z-index:2000;display:flex;flex-direction:column;align-items:center;gap:var(--space-2);pointer-events:none}.message-item{display:flex;justify-content:center}.message{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);background:color-mix(in srgb,var(--teacher-surface) 94%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(var(--teacher-fg-rgb),.1);border-radius:var(--radius-full);box-shadow:0 12px 32px #00000038;color:var(--teacher-text-primary);font-size:var(--text-sm);font-weight:var(--font-medium);pointer-events:auto;opacity:0;transform:translateY(-12px) scale(.96);transition:opacity .26s cubic-bezier(.22,1,.36,1),transform .26s cubic-bezier(.22,1,.36,1);will-change:opacity,transform}.message.is-visible:not(.is-leaving){opacity:1;transform:translateY(0) scale(1)}.message.is-leaving{opacity:0;transform:translateY(-10px) scale(.96);transition:opacity .22s cubic-bezier(.4,0,1,1),transform .22s cubic-bezier(.4,0,1,1)}.message svg{flex:0 0 auto}.message-success svg{color:#34d399}.message-warning svg{color:#fbbf24}.message-error svg{color:#f87171}.message-info svg{color:var(--teacher-accent)}@media(prefers-reduced-motion:reduce){.message{transition-duration:.01ms}}.icon{display:inline-flex;align-items:center;justify-content:center;width:1em;height:1em;font-size:inherit;line-height:1}.link{color:var(--teacher-accent);text-decoration:none;cursor:pointer;font-size:var(--text-sm);transition:color var(--transition-fast)}.link:hover{color:color-mix(in srgb,var(--teacher-accent) 78%,rgb(var(--teacher-fg-rgb)));text-decoration:underline}.content-fade-enter{animation:content-fade-in .42s cubic-bezier(.22,1,.36,1) both}@keyframes content-fade-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.content-fade-enter{animation:none}}