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#0000}.logout-btn:hover{background:var(--ink-danger);color:#fff}.btn-red{background:var(--danger)}.admin-container{max-width:1200px;margin:40px auto;padding:0 20px}.admin-tabs{justify-content:center;gap:10px;margin-bottom:30px;display:flex}.admin-matrix-page .admin-matrix-intro{color:var(--ink-text-muted);max-width:52rem;margin-bottom:1.25rem;font-size:.95rem;line-height:1.5}.admin-matrix-scroll{-webkit-overflow-scrolling:touch;margin:0 -8px;padding:0 8px 12px;overflow-x:auto}.admin-matrix-table{border-collapse:collapse;width:max-content;min-width:100%;font-size:.9rem}.admin-matrix-table th,.admin-matrix-table td{border:1px solid var(--ink-border);vertical-align:middle;background:var(--ink-surface);padding:10px 12px}.admin-matrix-table thead th{background:var(--ink-surface-subtle);text-align:center;font-weight:600;position:relative}.admin-matrix-sticky-col{z-index:2;text-align:left;min-width:11rem;max-width:14rem;position:sticky;left:0;box-shadow:4px 0 8px -4px #00000059}.admin-matrix-table tbody th.admin-matrix-sticky-col{background:var(--ink-surface-subtle)}.admin-matrix-quiz-title{text-align:left;white-space:nowrap;text-overflow:ellipsis;max-width:14rem;font-weight:600;position:relative;overflow:hidden}.admin-matrix-user-head{color:var(--ink-text);font-weight:700;display:block}.admin-matrix-user-email{color:var(--ink-text-muted);word-break:break-all;margin-top:4px;font-size:.72rem;font-weight:500;display:block}.admin-matrix-row-summary th{text-align:left;font-weight:700}.admin-matrix-row-summary td{text-align:center;font-variant-numeric:tabular-nums;font-weight:600}.admin-matrix-cell{width:100%;min-height:2.5rem;color:var(--ink-text);font:inherit;font-variant-numeric:tabular-nums;cursor:pointer;background:0 0;border:none;border-radius:8px;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;margin:0;padding:8px 10px;transition:background .15s,box-shadow 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textarea{resize:vertical;min-height:100px}.opt-row{align-items:center;gap:10px;margin-bottom:10px;display:flex}.label-char{background:var(--accent);border-radius:6px;justify-content:center;align-items:center;min-width:32px;height:32px;font-weight:700;display:flex}.preview-list-scroll{flex-direction:column;gap:20px;display:flex}.preview-card-detailed{background:var(--bg-card);border:1px solid var(--border);text-align:left;border-radius:12px;padding:20px}.preview-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:15px;padding-bottom:10px;display:flex}.task-number{color:var(--accent);text-transform:uppercase;font-size:.8rem;font-weight:800}.preview-question{margin-bottom:20px;font-size:1.1rem;line-height:1.5}.preview-opt-item{background:var(--bg-input);color:var(--text-dim);border:1px solid #0000;border-radius:8px;align-items:center;margin-bottom:8px;padding:10px 15px;display:flex}.preview-opt-item.is-correct{border-color:var(--accent);background:var(--ink-accent-faint);color:#fff}.opt-letter{color:var(--accent);margin-right:12px;font-weight:700}.check{color:var(--success);margin-left:auto;font-weight:700}.quiz-list{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;display:grid}.quiz-card-admin{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;flex-direction:column;gap:15px;padding:24px;display:flex}.card-actions{gap:10px;display:flex}.quiz-group-container{max-width:800px;margin:0 auto 40px}.task-card{transition:transform .2s}.task-card:hover{transform:translateY(-2px)}.loader{height:100vh;color:var(--ink-text-muted);background:var(--ink-bg);justify-content:center;align-items:center;font-size:1.1rem;font-weight:600;display:flex}.stats-grid{grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:20px;display:grid}.stats-card{background:var(--bg-card);border:1px solid 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var(--border);justify-content:space-between;align-items:center;margin-bottom:15px;padding-bottom:15px;display:flex}.score-radial{text-align:right}.score-val{color:var(--accent);font-size:1.5rem;font-weight:700;display:block}.mini-ans-line{align-items:center;gap:15px;padding:8px 0;font-size:.9rem;display:flex}.mini-ans-line.ok{color:var(--success)}.mini-ans-line.err{color:var(--danger)}.dot{background:currentColor;border-radius:50%;width:8px;height:8px}.ans-status{margin-left:auto;font-size:.75rem;font-weight:700}.points-input-wrapper{align-items:center;gap:10px;display:flex}.points-field{text-align:center;font-weight:700;border:2px solid var(--accent)!important;width:80px!important}.unit-label{color:var(--text-dim);font-weight:700}.manual-grade-box{background:#ffffff0d;border-radius:8px;flex-direction:column;gap:10px;min-width:250px;padding:15px;display:flex}.feedback-textarea{color:#ccc;background:#111;border:1px solid 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var(--border);padding:15px}.opt-btn.selected{border-color:var(--accent);background:var(--ink-accent-soft)}.task-sidebar{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:20px}.task-dots{grid-template-columns:repeat(4,1fr);gap:10px;margin-top:15px;display:grid}.dot{background:var(--bg-input);cursor:pointer;border:1px solid var(--border);border-radius:8px;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.dot.current{border-color:var(--accent);color:var(--accent);font-weight:700}.dot.filled{background:var(--accent);color:#fff}.open-answer-input{background:var(--bg-input);color:#fff;border-radius:8px;width:100%;min-height:150px;margin:20px 0;padding:15px}.preview-header-main{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.btn-finish-quiz{background:var(--success,var(--ink-positive));color:#000;cursor:pointer;border:none;border-radius:8px;padding:8px 16px;font-weight:700;transition:transform 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var(--ink-border));border-left:4px solid var(--ink-accent);background:color-mix(in srgb, var(--ink-accent) 9%, var(--ink-surface-subtle));border-radius:12px;margin:14px 0 10px;padding:14px 16px 14px 18px;box-shadow:0 1px 2px #0000001f}.student-comment-callout--inline{margin-top:10px;margin-bottom:0;padding:10px 12px 10px 14px}.student-comment-callout__label{letter-spacing:.06em;text-transform:uppercase;color:var(--ink-accent);align-items:center;gap:8px;margin-bottom:8px;font-size:.7rem;font-weight:700;display:flex}.student-comment-callout__label:before{content:"💬";opacity:.95;font-size:1rem;line-height:1}.student-comment-callout__text{color:var(--ink-text);white-space:pre-wrap;word-break:break-word;margin:0;font-size:.95rem;line-height:1.55}.bottom-nav-bar{justify-content:space-between;margin-top:25px;display:flex}.nav-btn-prev,.nav-btn-next{color:#fff;cursor:pointer;background:#333;border:none;border-radius:6px;padding:10px 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