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var(--shadow-inset);-webkit-backdrop-filter:blur(12px)saturate(180%);transition:var(--transition-smooth);border-radius:20px;flex-direction:column;flex:1;gap:16px;padding:20px;display:flex;overflow:hidden}.section-title{align-items:center;gap:8px;display:flex;position:relative}.section-title h2{font-size:.95rem;font-weight:800}.clear-all-btn{color:#f87171;cursor:pointer;background:0 0;border:none;font-size:.72rem;font-weight:700;position:absolute;right:0}.clear-all-btn:hover{text-decoration:underline}.manager-error{color:#f87171;background:#ef44441a;border:1px solid #ef444440;border-radius:8px;padding:8px 12px;font-size:.75rem}.add-controller{flex-direction:column;gap:10px;display:flex}.add-tabs{background:#00000026;border-radius:8px;gap:4px;padding:3px;display:flex}.light-theme .add-tabs{background:#0000000d}.tab-btn{color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast);background:0 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#111827!important;border-radius:0!important;margin-bottom:24px!important;padding:10px 0!important}.classroom-export-header:before{display:none!important}.academic-badge{color:#111827!important;background:#f3f4f6!important;border:1px solid #374151!important}.class-info{-webkit-text-fill-color:initial!important;color:#111827!important;background:0 0!important;font-size:1.8rem!important}.school-name{color:#4b5563!important}.meta-badge{background:#f3f4f6!important;border:1px solid #e5e7eb!important}.meta-badge .value{color:#111827!important}.blackboard-area{justify-content:center;display:flex;width:100%!important;margin-bottom:30px!important}.green-blackboard{min-width:300px;width:45%!important}.blackboard-wood-frame{box-shadow:none!important;background:#fff!important;border:3px solid #1f2937!important;border-radius:6px!important;padding:8px 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.desk-wood-texture{background:#fff!important;border:none!important;padding:8px!important}.student-badge{box-shadow:none!important;background:#fff!important;border:1px solid #4b5563!important;border-top:5px solid #111827!important;border-radius:8px!important;padding:8px 6px!important}.gender-M .student-badge{border-top-color:#3b82f6!important}.gender-F .student-badge{border-top-color:#ec4899!important}.gender-N .student-badge{border-top-color:#6b7280!important}.student-badge-name{letter-spacing:-.01em;color:#111827!important;font-size:1.3rem!important;font-weight:800!important}.student-badge-gender-label{color:#1f2937!important;background:#f3f4f6!important;border:1px solid #4b5563!important;border-radius:3px!important;padding:1px 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#6366f10d}.classroom-export-header:before{content:"";background:linear-gradient(#6366f1,#d946ef);width:4px;height:100%;position:absolute;top:0;left:0}.classroom-title-area{text-align:left;flex-direction:column;gap:4px;display:flex}.academic-badge{text-transform:uppercase;letter-spacing:.08em;color:#a5b4fc;background:#6366f126;border:1px solid #6366f14d;border-radius:9999px;width:fit-content;padding:2px 8px;font-size:.72rem;font-weight:800}.light-theme .academic-badge{color:#4f46e5;background:#6366f114;border:1px solid #6366f126}.school-class-title{color:var(--text-primary);align-items:center;gap:12px;margin:0;font-weight:900;display:flex}.school-name{opacity:.85;font-size:1.15rem}.class-info{background:linear-gradient(135deg,#a5b4fc 0%,#f472b6 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.45rem;font-weight:900}.light-theme .class-info{background:linear-gradient(135deg,#4f46e5 0%,#db2777 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.classroom-meta-area{align-items:center;gap:12px;display:flex}.meta-badge{background:#0003;border:1px solid #ffffff0a;border-radius:10px;flex-direction:column;align-items:flex-end;padding:6px 12px;display:flex}.light-theme .meta-badge{background:#fffc;border:1px solid #0000000a;box-shadow:0 2px 8px #00000005}.meta-badge .label{color:var(--text-muted);text-transform:uppercase;font-size:.65rem;font-weight:600}.meta-badge .value{color:var(--text-primary);font-size:.85rem;font-weight:800}.meta-badge.date-stamp{justify-content:center}.meta-badge.date-stamp .value{color:var(--text-secondary)}body.is-exporting-image,body.is-exporting-pdf{background:var(--bg-app)!important;overflow:visible!important}body.is-exporting-image .classroom-main-export,body.is-exporting-pdf .classroom-main-export{z-index:999999!important;background:var(--bg-app)!important;box-sizing:border-box!important;width:1120px!important;height:792px!important;box-shadow:none!important;border:none!important;border-radius:0!important;flex-direction:column!important;justify-content:flex-start!important;padding:32px!important;display:flex!important;position:fixed!important;top:0!important;left:0!important;transform:none!important}body.is-exporting-image .classroom-export-header,body.is-exporting-pdf .classroom-export-header{background:#ffffff05!important;border:1px solid #ffffff14!important;margin-bottom:24px!important;padding:16px 24px!important}body.light-theme.is-exporting-image .classroom-export-header,body.light-theme.is-exporting-pdf .classroom-export-header{background:#fffffff2!important;border:1px solid #6366f11a!important}body.is-exporting-image .classroom-container,body.is-exporting-pdf .classroom-container{flex-direction:column!important;flex:1!important;justify-content:space-between!important;margin:0!important;padding:0!important;display:flex!important}body.is-exporting-image .seating-grid,body.is-exporting-pdf .seating-grid{flex:1!important;align-content:center!important;gap:16px 20px!important;display:grid!important}.email-simulator-toast{z-index:9999;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#111827f2;border:1px solid #ffffff1a;border-radius:12px;width:360px;position:fixed;top:24px;right:24px;overflow:hidden;box-shadow:0 20px 25px -5px #00000080,0 10px 10px -5px #0006}.simulator-header{color:#a7f3d0;background:#ffffff0d;border-bottom:1px solid #ffffff0d;align-items:center;gap:8px;padding:12px 16px;font-size:.9rem;font-weight:700;display:flex}.simulator-header svg{color:#34d399}.simulator-close{color:#fff6;cursor:pointer;background:0 0;border:none;margin-left:auto;font-size:1.2rem;line-height:1}.simulator-close:hover{color:#fff}.simulator-body{color:#d1d5db;padding:16px;font-size:.85rem}.simulator-recipient{border-bottom:1px dashed #ffffff1a;margin-bottom:12px;padding-bottom:8px}.simulator-mail-title{color:#f3f4f6;margin-bottom:10px}.simulator-content-box{background:#0003;border:1px solid #ffffff0d;border-radius:8px;padding:12px}.simulator-code-box{text-align:center;background:#34d3991a;border:1px dashed #34d399;border-radius:6px;margin:12px 0;padding:8px}.simulator-code-box span{letter-spacing:.2em;color:#34d399;font-family:monospace;font-size:1.6rem;font-weight:800}.simulator-link-btn{text-align:center;color:#fff;background:#3b82f6;border-radius:6px;margin:12px 0;padding:8px 12px;font-weight:700;text-decoration:none;transition:background .2s;display:block}.simulator-link-btn:hover{background:#2563eb}.simulator-desc{color:#fff6;margin-top:8px;font-size:.75rem;line-height:1.4}.portal-modal-backdrop{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:99999;background:#0009;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.portal-modal-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:16px;width:100%;max-width:500px;overflow:hidden;box-shadow:0 25px 50px -12px #00000080}.modal-header{border-bottom:1px solid var(--border-card);align-items:center;gap:12px;padding:20px 24px;display:flex}.modal-header.warning{color:#f59e0b;background:#f59e0b0d}.modal-header.danger{color:#ef4444;background:#ef44440d}.modal-header h2{margin:0;font-size:1.25rem;font-weight:800}.modal-body{color:var(--text-secondary);padding:24px;font-size:.92rem;line-height:1.6}.modal-body p{margin-bottom:14px}.highlight-text{color:var(--text-primary);border-left:4px solid var(--primary-color);background:#ffffff08;border-radius:8px;padding:12px;font-size:1.05rem}.warning-note{color:#f87171;font-weight:700}.email-recommend-box{background:#3b82f60d;border:1px solid #3b82f626;border-radius:10px;margin-top:20px;padding:16px}.email-recommend-box h4{color:#60a5fa;margin-bottom:6px;font-weight:700}.modal-footer{border-top:1px solid var(--border-card);background:#0000001a;flex-direction:column;gap:10px;padding:16px 24px;display:flex}.modal-btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:8px;width:100%;padding:12px;font-size:.9rem;font-weight:700;transition:all .2s;display:flex}.register-email-btn{color:#fff;background:#3b82f6}.register-email-btn:hover{background:#2563eb}.skip-email-btn{color:var(--text-secondary);border:1px solid var(--border-card);background:#ffffff0d}.skip-email-btn:hover{color:var(--text-primary);background:#ffffff1a}.cancel-modal-btn{color:#fff6;background:0 0;font-size:.8rem;font-weight:500}.cancel-modal-btn:hover{color:var(--text-secondary)}.delete-confirm-btn{color:#fff;background:#ef4444}.delete-confirm-btn:hover{background:#dc2626}.error-text-container{flex-direction:column;gap:8px;width:100%;display:flex}.error-action-btn{color:#60a5fa;text-align:left;cursor:pointer;background:0 0;border:none;width:max-content;padding:0;font-size:.8rem;font-weight:700;text-decoration:underline}.error-action-btn:hover{color:#3b82f6}.form-desc{color:var(--text-secondary);margin-top:-6px;margin-bottom:12px;font-size:.8rem;line-height:1.4}.register-label-highlight{align-items:center;gap:6px;display:flex;color:var(--primary-color)!important}.save-img-btn:hover{color:#3b82f6!important;background:#3b82f61a!important;border-color:#3b82f64d!important}.save-pdf-btn:hover{color:#10b981!important;background:#10b9811a!important;border-color:#10b9814d!important}.light-theme .save-img-btn:hover{background:#3b82f614!important}.light-theme .save-pdf-btn:hover{background:#10b98114!important}