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10px;font-size:12px;font-weight:500;display:inline-flex}.badge-blue{background:var(--primary-light);color:var(--primary)}.badge-green{background:var(--success-light);color:#059669}.badge-orange{background:var(--warning-light);color:#d97706}.badge-red{background:var(--danger-light);color:#dc2626}.badge-gray{color:var(--text-secondary);background:#f3f4f6}.bottom-nav{background:var(--surface);border-top:1px solid var(--border);width:100%;padding:8px 0 max(8px, env(safe-area-inset-bottom));z-index:50;display:flex;position:fixed;bottom:0;left:0}.bottom-nav-item{cursor:pointer;color:var(--text-muted);background:0 0;border:none;flex-direction:column;flex:1;align-items:center;gap:2px;padding:6px 0;font-size:11px;font-weight:500;text-decoration:none;transition:color .15s;display:flex}.bottom-nav-item.active{color:var(--primary)}@keyframes typing{0%,to{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1)}}.typing-dot{background:var(--primary);border-radius:50%;width:6px;height:6px;animation:1.2s infinite typing}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes blink{0%,50%{opacity:1}51%,to{opacity:0}}.typing-cursor{background:var(--primary);vertical-align:middle;width:2px;height:1em;margin-left:2px;animation:1s step-end infinite blink;display:inline-block}.student-layout{width:100%;min-height:100dvh;display:flex}.student-main{flex-direction:column;flex:1;min-width:0;padding-bottom:72px;display:flex}@media (min-width:768px){.student-main{padding-bottom:0}}.student-sidebar{background:var(--surface);border-right:1px solid var(--border);z-index:60;flex-direction:column;width:84%;max-width:300px;transition:transform .25s;display:flex;position:fixed;top:0;bottom:0;left:0;overflow:hidden;transform:translate(-100%)}.student-sidebar.is-open{box-shadow:var(--shadow-lg);transform:translate(0)}.student-sidebar-overlay{z-index:55;opacity:0;pointer-events:none;background:#0006;transition:opacity .25s;position:fixed;inset:0}.student-sidebar-overlay.is-open{opacity:1;pointer-events:auto}.sidebar-brand{align-items:center;gap:10px;padding:20px 16px 16px;display:flex}.sidebar-brand-mark{background:var(--primary-light);border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:18px;display:flex}.sidebar-brand-name{color:var(--text-primary);letter-spacing:-.01em;font-size:15px;font-weight:600}.sidebar-brand-sub{color:var(--text-muted);font-size:11px}.sidebar-nav{padding:4px 10px}.nav-item{color:var(--text-secondary);border-radius:10px;align-items:center;gap:12px;padding:10px 12px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s,color .15s;display:flex}.nav-item:hover{background:var(--bg);color:var(--text-primary)}.nav-item.is-active{background:var(--primary-light);color:var(--primary);font-weight:600}.nav-item-icon{text-align:center;width:22px;font-size:18px;line-height:1}.nav-item-label{line-height:1}.new-topic-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:11px;justify-content:center;align-items:center;gap:8px;margin:4px 10px 0;padding:11px 14px;font-size:14px;font-weight:600;transition:filter .15s,transform .1s;display:flex}.new-topic-btn:hover{filter:brightness(.95)}.new-topic-btn:active{transform:scale(.98)}.sidebar-section{flex-direction:column;flex:1;min-height:0;margin-top:8px;padding:0 10px 12px;display:flex}.sidebar-section-header{justify-content:space-between;align-items:center;padding:12px 12px 8px;display:flex}.sidebar-section-title{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:11px;font-weight:600}.conv-list{flex:1;padding:0 2px 8px;overflow-y:auto}.conv-loading{justify-content:center;gap:4px;padding:16px;display:flex}.conv-empty{text-align:center;color:var(--text-muted);padding:16px;font-size:12px}.conv-item{text-align:left;cursor:default;border:1px solid #0000;border-radius:10px;align-items:center;width:100%;margin-bottom:2px;transition:background .15s,border-color .15s;display:flex}.conv-item:hover{background:var(--bg)}.conv-item.is-active{background:var(--primary-light);border-color:var(--primary)}.conv-item.is-confirming{background:var(--bg);border-color:var(--danger)}.conv-item-main{cursor:pointer;text-align:left;background:0 0;border:none;flex:1;min-width:0;padding:10px 4px 10px 12px}.conv-item-action{width:30px;height:30px;color:var(--text-muted);cursor:pointer;opacity:0;background:0 0;border:none;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;margin:0 4px;transition:opacity .15s,background .15s,color .15s;display:flex}.conv-item:hover .conv-item-action,.conv-item-action:focus-visible{opacity:1}.conv-item-action:hover{background:var(--danger-light);color:var(--danger)}@media (hover:none){.conv-item-action{opacity:.55}}.conv-confirm{align-items:center;gap:6px;width:100%;padding:8px 10px;display:flex}.conv-confirm-text{color:var(--text-primary);flex:1;font-size:12px;font-weight:500}.conv-confirm-btn{border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);cursor:pointer;border-radius:7px;flex-shrink:0;padding:5px 10px;font-size:12px;font-weight:600;transition:background .15s,color .15s}.conv-confirm-btn:hover{background:var(--bg)}.conv-confirm-btn.is-danger{background:var(--danger);border-color:var(--danger);color:#fff}.conv-confirm-btn.is-danger:hover{filter:brightness(.92)}.sidebar-section-action{color:var(--text-muted);cursor:pointer;background:0 0;border:none;padding:2px 4px;font-size:11px;font-weight:600;transition:color .15s}.sidebar-section-action:hover{color:var(--primary)}.review-segment{border:none;border-radius:999px;flex:1;height:6px;padding:0;transition:transform .1s,opacity .15s}.review-segment:hover{opacity:.85}.review-segment:active{transform:scaleY(1.3)}.chat-bubble-error{background:var(--danger-light);border:1.5px solid var(--danger);color:var(--danger);font-size:13px}.retry-btn{border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);cursor:pointer;border-radius:8px;margin-top:4px;margin-left:2px;padding:4px 12px;font-size:12px;font-weight:600;transition:background .15s,color .15s;display:inline-block}.retry-btn:hover{background:var(--bg);color:var(--primary)}.fallback-badge{background:var(--warning-light);color:var(--warning);border-radius:6px;align-items:center;gap:4px;padding:3px 8px;font-size:11px;font-weight:600;display:inline-flex}.conv-item-title{color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;margin-bottom:4px;font-size:13px;font-weight:500;overflow:hidden}.conv-item-meta{color:var(--text-muted);align-items:center;gap:6px;font-size:10px;display:flex}.scene-tag{background:var(--primary-light);color:var(--primary);white-space:nowrap;border-radius:999px;align-items:center;gap:3px;padding:2px 8px;font-size:11px;font-weight:500;display:inline-flex}@media (min-width:768px){.app-container:has(.student-layout){max-width:100%}.student-sidebar{width:260px;max-width:260px;height:100dvh;box-shadow:none;flex-shrink:0;transition:none;position:sticky;top:0;transform:none}.student-sidebar-overlay{display:none}.app-container:has(.student-layout) .bottom-nav{display:none}}.chat-header{padding-top:max(16px, env(safe-area-inset-top));padding-bottom:12px}@media (min-width:768px){.chat-header{padding-top:16px}}.chat-input-bar{max-width:480px}.chat-input-inner{max-width:768px;margin:0 auto}@media (min-width:768px){.chat-input-bar{max-width:none}}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-divide-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-gradient-position{syntax:"*";inherits:false}@property --tw-gradient-from{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-via{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-to{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-stops{syntax:"*";inherits:false}@property --tw-gradient-via-stops{syntax:"*";inherits:false}@property --tw-gradient-from-position{syntax:"<length-percentage>";inherits:false;initial-value:0%}@property --tw-gradient-via-position{syntax:"<length-percentage>";inherits:false;initial-value:50%}@property --tw-gradient-to-position{syntax:"<length-percentage>";inherits:false;initial-value:100%}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@keyframes spin{to{transform:rotate(360deg)}}