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0;font-size:14px;line-height:1.7}.teacher-timeline-list{gap:12px;margin-top:14px;display:grid}.teacher-timeline-item{grid-template-columns:76px minmax(0,1fr);gap:12px;display:grid}.teacher-timeline-time{color:#667085;padding-top:12px;font-size:14px;font-weight:800}.teacher-timeline-body{background:#f8fafc;border:1px solid #dbe3ec;border-radius:10px;min-width:0;padding:12px 14px}.teacher-timeline-title{color:#101828;flex-wrap:wrap;align-items:center;gap:8px;font-weight:800;display:flex}.teacher-timeline-body p{color:#475467;white-space:pre-line;overflow-wrap:anywhere;margin:8px 0 0;font-size:14px;line-height:1.75}.teacher-generation-panel{min-width:0;max-height:calc(100dvh - 40px);position:sticky;top:20px;overflow:auto}.teacher-generation-head{justify-content:space-between;gap:12px}.teacher-generation-head>button{flex:none}.teacher-generation-list{gap:14px;margin-top:16px;display:grid}.teacher-generation-card{background:#fff;border:1px solid #dbe3ec;border-radius:10px;gap:12px;min-width:0;padding:12px;display:grid}.teacher-generation-card-head{color:#101828;justify-content:space-between;align-items:center;gap:10px;font-size:16px;font-weight:900;display:flex}.teacher-generation-image{aspect-ratio:4/3;margin-top:0}.teacher-generation-placeholder{aspect-ratio:4/3;min-height:auto;margin-top:0}.teacher-generation-meta{color:#475467;gap:8px;font-size:14px;line-height:1.7;display:grid}.teacher-generation-meta p{overflow-wrap:anywhere;margin:0}.teacher-generation-meta span{color:#344054;font-weight:900}.teacher-generation-error{color:#b42318}@media (max-width:900px){.classroom-shell{padding:12px}.teacher-detail-frame,.teacher-detail-content-grid{grid-template-columns:1fr}.teacher-generation-panel{max-height:none;position:static}.teacher-detail-summary{grid-template-columns:1fr}.teacher-timeline-item{grid-template-columns:1fr;gap:6px}.teacher-timeline-time{padding-top:0}}.prototype-page{background:radial-gradient(circle at 0 0,#ffdc8c2e,#0000 24%),radial-gradient(circle at 100% 0,#65c5b02e,#0000 28%),linear-gradient(#edf5f2 0%,#f8fbfa 100%);min-height:100dvh;padding:clamp(10px,1.4vw,18px)}.prototype-page-student{background:radial-gradient(circle at 10% 0,#ffd3753d,#0000 24%),radial-gradient(circle at 100% 0,#5bc0b338,#0000 28%),linear-gradient(#eef7f4 0%,#f8fbfa 48%,#f4fbf8 100%)}.prototype-frame{color:#172033;background:linear-gradient(#fffffffa,#f7faf9fa),linear-gradient(135deg,#ffffff7a,#deeeea42);border:1px solid #d8e7e2e6;border-radius:24px;width:min(100%,1536px);min-height:calc(100dvh - clamp(20px,2.8vw,36px));margin:0 auto;overflow:hidden;box-shadow:0 22px 56px #274a451a,inset 0 1px #fffc}.prototype-header{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#ffffffe0;border-bottom:1px solid #e2ece8eb;align-items:center;gap:18px;min-height:72px;padding:0 32px;display:flex}.prototype-brand{color:#fff;background:linear-gradient(135deg,#55b6aa,#3e9b8f);border-radius:999px;align-items:center;gap:8px;min-height:38px;padding:0 16px;font-weight:800;display:inline-flex;box-shadow:0 12px 24px #43a4972e}.prototype-header h1{letter-spacing:-.02em;margin:0;font-size:clamp(22px,2vw,28px);font-weight:900}.prototype-header-student{flex-wrap:wrap;justify-content:space-between;height:auto;min-height:62px;padding-top:12px;padding-bottom:12px}.prototype-header-student-hub{justify-content:space-between;gap:18px;height:auto;min-height:82px;padding-top:14px;padding-bottom:14px}.prototype-header-main{align-items:center;gap:18px;min-width:0;display:flex}.prototype-student-hub-bar{align-items:center;gap:12px;margin-left:auto;display:inline-flex}.prototype-student-current-card{background:linear-gradient(#fffffffa,#f3fbf8f5),linear-gradient(135deg,#ffffff5c,#d5f1e947);border:1px solid #d8e7e2;border-radius:22px;align-items:center;gap:12px;min-width:0;max-width:420px;min-height:60px;padding:0 16px;display:inline-flex;box-shadow:0 14px 24px #43a49714}.prototype-student-current-card div{min-width:0}.prototype-student-current-card strong{color:#173938;font-size:14px;font-weight:900;display:block}.prototype-student-current-card p{color:#72807f;text-overflow:ellipsis;white-space:nowrap;margin:2px 0 0;font-size:12px;overflow:hidden}.prototype-student-current-card>span{color:#2f7d71;background:#fff;border-radius:999px;flex:none;min-height:28px;padding:0 10px;font-size:12px;font-weight:800;line-height:28px}.prototype-student-manage-button,.student-hub-primary{color:#fff;background:linear-gradient(135deg,#55b6aa,#43a497);border:0;border-radius:14px;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:0 16px;font-size:14px;font-weight:900;display:inline-flex;box-shadow:0 12px 24px #43a4972e}.prototype-overview-bar{background:linear-gradient(#ffffffd1,#f6fbf9eb),linear-gradient(90deg,#ffffff2e,#e1f2ed33);border-bottom:1px solid #e1ece8f5;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;padding:14px 32px 18px;display:grid}.prototype-overview-card{background:linear-gradient(#fffffffa,#f6fcfaf2),linear-gradient(135deg,#ffffff4d,#dcf1eb33);border:1px solid #d5e6e1eb;border-radius:16px;gap:6px;min-height:82px;padding:16px 18px;display:grid;box-shadow:0 16px 28px #234c470f}.prototype-student-status-bar{padding-top:12px;padding-bottom:12px}.prototype-overview-card span{color:#6c8180;letter-spacing:.08em;font-size:12px;font-weight:800}.prototype-overview-card strong{color:#173938;text-overflow:ellipsis;white-space:nowrap;font-size:18px;font-weight:900;overflow:hidden}.prototype-overview-card small{color:#72807f;text-overflow:ellipsis;white-space:nowrap;font-size:13px;line-height:1.5;overflow:hidden}.prototype-overview-card.accent{background:linear-gradient(#fffaeffa,#fff5e2f2),linear-gradient(135deg,#ffffff38,#ffd98c2e);border-color:#f0ce7cdb;box-shadow:0 18px 30px #f0b2671f}.prototype-overview-card.accent strong{color:#8c5610}.prototype-overview-card.accent small,.prototype-overview-card.accent span{color:#a56d21}.student-hub-backdrop{z-index:90;opacity:0;pointer-events:none;background:#0f232938;transition:opacity .18s;position:fixed;inset:0}.student-hub-backdrop.open{opacity:1;pointer-events:auto}.student-hub-drawer{z-index:91;background:linear-gradient(#f7fcfb 0%,#eef7f4 100%);border-left:1px solid #dfeae7;grid-template-rows:auto auto auto minmax(0,1fr);width:min(420px,100vw);height:100dvh;padding:20px;transition:transform .22s;display:grid;position:fixed;top:0;right:0;transform:translate(100%);box-shadow:-28px 0 46px #13373429}.student-hub-drawer.open{transform:translate(0)}.student-hub-drawer-head{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.student-hub-drawer-head strong,.student-editor-head strong{color:#173938;font-size:22px;font-weight:900;display:block}.student-hub-drawer-head p,.student-editor-head p{color:#6c8180;margin:6px 0 0;font-size:14px;line-height:1.6}.student-hub-close{color:#4f6663;background:#fff;border:1px solid #d7e7e2;border-radius:12px;place-items:center;width:38px;height:38px;display:grid}.student-hub-current{background:#ffffffd1;border:1px solid #d8e8e2;border-radius:20px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;margin-top:18px;padding:16px;display:grid}.student-hub-current strong{color:#173938;font-size:16px;font-weight:900;display:block}.student-hub-current p{color:#738382;margin:4px 0 0;font-size:13px}.student-hub-ghost,.student-hub-link{color:#486460;background:#fff;border:1px solid #d6e6e1;border-radius:12px;justify-content:center;align-items:center;gap:8px;min-height:38px;padding:0 14px;font-size:13px;font-weight:800;display:inline-flex}.student-hub-link{color:#4b8f83;background:0 0;border:0;min-height:auto;padding:0}.student-hub-danger{color:#c2410c}.student-hub-list{grid-auto-rows:max-content;align-content:start;gap:12px;margin-top:16px;padding-right:4px;display:grid;overflow-y:auto}.student-hub-card{background:#ffffffdb;border:1px solid #dbe9e6;border-radius:18px;gap:14px;padding:16px;display:grid}.student-hub-card-main{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:12px;display:grid}.student-hub-card-main strong{color:#173938;font-size:15px;font-weight:900;display:block}.student-hub-card-main p{color:#748281;margin:4px 0 0;font-size:13px}.student-hub-card-actions{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.student-hub-card-actions span{color:#2f7d71;background:#eef8f5;border-radius:999px;min-height:28px;padding:0 10px;font-size:12px;font-weight:800;line-height:28px}.student-hub-card-actions>button:not(.student-hub-link){color:#496461;background:#fff;border:1px solid #d7e7e2;border-radius:12px;align-items:center;gap:4px;min-height:34px;padding:0 12px;font-size:13px;font-weight:800;display:inline-flex}.student-editor-backdrop{z-index:92;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#0f232957;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.student-editor-modal{background:linear-gradient(#fbfefd 0%,#f2faf7 100%);border-radius:28px;width:min(980px,100%);max-height:min(92dvh,900px);padding:24px;overflow-y:auto;box-shadow:0 28px 60px #0f232933}.student-editor-head,.student-editor-foot{justify-content:space-between;align-items:center;gap:16px;display:flex}.student-editor-layout{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:18px;margin-top:20px;display:grid}.student-editor-profile,.student-editor-avatar-tools{gap:16px;display:grid}.student-editor-avatar-preview,.student-editor-block{background:#ffffffe0;border:1px solid #dcebe6;border-radius:22px;padding:18px}.student-editor-avatar-preview{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:16px;display:grid}.student-editor-avatar-preview strong{color:#173938;font-size:20px;font-weight:900;display:block}.student-editor-avatar-preview p{color:#738382;margin:6px 0 0;font-size:14px}.student-editor-fields{gap:12px;display:grid}.student-editor-fields label{gap:8px;display:grid}.student-editor-fields span,.student-editor-block-title{color:#355b57;align-items:center;gap:8px;font-size:14px;font-weight:900;display:inline-flex}.student-editor-fields input{color:#172033;background:#fbfefd;border:1px solid #d7e7e2;border-radius:14px;outline:none;height:48px;padding:0 14px}.student-avatar-preset-list{flex-wrap:wrap;gap:10px;margin-top:14px;display:flex}.student-avatar-preset{background:#fff;border:1px solid #d8e8e2;border-radius:18px;place-items:center;width:56px;height:56px;font-size:28px;transition:transform .16s,border-color .16s,box-shadow .16s;display:grid}.student-avatar-preset.active{border-color:#55b6aa;transform:translateY(-1px);box-shadow:0 0 0 3px #55b6aa24}.student-editor-upload-row,.student-camera-actions{flex-wrap:wrap;gap:10px;margin-top:14px;display:flex}.student-camera-box{background:#f4faf8;border:1px dashed #c9ded8;border-radius:18px;min-height:240px;margin-top:14px;display:grid;position:relative;overflow:hidden}.student-camera-video{object-fit:cover;width:100%;height:240px}.student-camera-placeholder{color:#6f8381;text-align:center;place-items:center;gap:10px;padding:24px;display:grid}.student-camera-countdown{color:#fff;background:#173938c2;border-radius:50%;place-items:center;width:52px;height:52px;font-size:22px;font-weight:900;display:grid;position:absolute;top:16px;right:16px}.student-editor-foot{margin-top:20px}.student-avatar{color:#2c7a70;background:linear-gradient(135deg,#d7fff0 0%,#dce8ff 100%);border-radius:16px;flex:none;place-items:center;width:44px;height:44px;font-size:24px;font-weight:900;display:grid;overflow:hidden}.student-avatar img{object-fit:cover;width:100%;height:100%}.student-avatar-large{border-radius:24px;width:84px;height:84px;font-size:40px}.prototype-student-switcher{align-items:center;gap:12px;margin-left:auto;display:flex}.prototype-student-switcher-title{color:#456260;align-items:center;gap:6px;font-size:13px;font-weight:800;display:inline-flex}.prototype-student-switcher-list{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.prototype-student-chip,.prototype-student-add{color:#4c5f67;background:#fff;border:1px solid #d9e7e2;border-radius:999px;align-items:center;gap:8px;min-height:38px;padding:0 14px;transition:border-color .16s,background .16s,box-shadow .16s,transform .16s;display:inline-flex}.prototype-student-chip strong{font-size:13px}.prototype-student-chip span,.prototype-student-add{font-size:12px;font-weight:700}.prototype-student-chip:hover,.prototype-student-add:hover{border-color:#91c7ba;transform:translateY(-1px);box-shadow:0 8px 18px 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0}.prototype-waiting-scene-cloud,.prototype-waiting-scene-star,.prototype-waiting-yarn-string,.prototype-waiting-yarn-ball,.prototype-waiting-cat,.prototype-waiting-cat-head,.prototype-waiting-cat-body,.prototype-waiting-cat-tail,.prototype-waiting-cat-ear,.prototype-waiting-cat-eye,.prototype-waiting-cat-nose,.prototype-waiting-cat-whisker,.prototype-waiting-scene-caption{position:absolute}.prototype-waiting-scene-cloud{filter:blur(.2px);background:#ffffffdb;border-radius:999px;height:24px;animation:6s ease-in-out infinite prototype-waiting-float}.prototype-waiting-scene-cloud:before,.prototype-waiting-scene-cloud:after{content:"";background:inherit;border-radius:50%;position:absolute;bottom:2px}.prototype-waiting-scene-cloud:before{width:22px;height:22px;left:12px}.prototype-waiting-scene-cloud:after{width:18px;height:18px;left:30px}.prototype-waiting-scene .cloud-one{width:52px;top:26px;left:24px}.prototype-waiting-scene 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