@import"https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;600;700&display=swap";:root{--font-sans: "Plus Jakarta Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--color-brand-primary: #1c1917;--color-brand-primary-hover: #292524;--color-brand-accent: #d97706;--color-brand-accent-hover: #b45309;--color-bg-base: #f9f8f6;--color-surface-card: #ffffff;--color-surface-subtle: #f2f0eb;--color-surface-muted: #eae7df;--color-border-subtle: #e7e5e0;--color-border-medium: #d6d3cc;--color-border-strong: #a8a29e;--color-text-main: #1c1917;--color-text-body: #44403c;--color-text-muted: #78716c;--color-text-inverse: #ffffff;--status-pass-text: #166534;--status-pass-bg: #f0fdf4;--status-pass-border: #bbf7d0;--status-fail-text: #991b1b;--status-fail-bg: #fef2f2;--status-fail-border: #fecaca;--status-warn-text: #9a3412;--status-warn-bg: #fff7ed;--status-warn-border: #fed7aa;--shadow-xs: 0 1px 2px rgba(15, 23, 42, .04);--shadow-sm: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);--shadow-md: 0 4px 6px -1px rgba(15, 23, 42, .07), 0 2px 4px -2px rgba(15, 23, 42, .05);--shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, .08), 0 4px 6px -4px rgba(15, 23, 42, .04);--shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, .1), 0 8px 10px -6px rgba(15, 23, 42, .04);--radius-xs: 4px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--color-bg-base);color:var(--color-text-main);line-height:1.5;font-size:15px;-webkit-font-smoothing:antialiased}.app-container{min-height:100vh;display:flex;flex-direction:column}.view-page-wrapper{display:flex;flex-direction:column;min-height:calc(100vh - 64px);padding-bottom:60px}.main-wrapper{flex:1;padding:1.75rem 2rem;max-width:1440px;width:100%;margin:0 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ease}.btn-nav-logout:hover{background:#1e293b;border-color:#475569;color:#fff}.btn-nav-tutorial{background:#0d9488;border:1px solid #0f766e;color:#fff;padding:.4rem .95rem;border-radius:var(--radius-sm);font-size:.85rem;font-weight:700;cursor:pointer;transition:all .15s ease;display:inline-flex;align-items:center;gap:.45rem;box-shadow:0 1px 3px #0003}.btn-nav-tutorial:hover{background:#0f766e;border-color:#115e59;color:#fff;box-shadow:0 2px 6px #0f766e59;transform:translateY(-1px)}.btn-nav-tutorial:active{transform:translateY(0)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;height:40px;padding:0 1.15rem;border-radius:var(--radius-md);font-size:.9rem;font-weight:600;font-family:inherit;border:none;cursor:pointer;transition:all .15s ease;text-decoration:none;line-height:1;box-sizing:border-box}.btn:active{transform:translateY(1px)}.btn-primary{background-color:var(--color-brand-primary);color:var(--color-text-inverse);box-shadow:0 1px 2px #0f766e33}.btn-primary:hover{background-color:var(--color-brand-primary-hover)}.btn-secondary{background-color:var(--color-surface-card);color:var(--color-text-body);border:1px solid var(--color-border-medium);box-shadow:var(--shadow-xs)}.btn-secondary:hover{background-color:var(--color-surface-subtle);border-color:var(--color-border-strong);color:var(--color-text-main)}.btn-outline-danger{background:transparent;border:1px solid #fca5a5;color:#b91c1c;box-shadow:var(--shadow-xs)}.btn-outline-danger:hover{background:#fef2f2;border-color:#f87171;color:#991b1b}.btn-icon{padding:0 .9rem;font-size:.9rem}.btn-large-action{width:100%;height:52px;background-color:var(--color-surface-card);color:var(--color-text-body);border:1.5px dashed var(--color-border-medium);font-size:1rem;font-weight:700;padding:0 1.25rem;border-radius:var(--radius-lg);transition:all .2s 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td.total-sticky-cell{background-color:#f8fafc!important}.sheet-table tr.row-hover td.total-sticky-cell{background-color:#f1f5f9!important}.add-student-row-cell{background-color:#fff;color:var(--color-brand-primary);font-weight:600;font-size:.9rem;padding:.65rem 1rem!important;cursor:pointer;text-align:left!important;transition:all .15s ease;-webkit-user-select:none;user-select:none;border-bottom:1.5px dashed var(--color-border-medium)!important}.add-student-row-cell:hover{background-color:#f0fdfa!important;color:var(--color-brand-primary-hover)}.add-student-input-container{display:flex;align-items:center;gap:.75rem;padding:.45rem 1rem;background-color:#fff}.col-resizer{position:absolute;top:0;right:-2px;width:7px;height:100%;cursor:col-resize;-webkit-user-select:none;user-select:none;touch-action:none;z-index:25;transition:background-color .15s ease}.col-resizer:hover,.col-resizer.is-resizing{background-color:#38bdf8;box-shadow:0 0 6px #38bdf899}.sub-th,.student-col-header{position:relative}.excel-workspace{display:flex;flex-direction:column;flex:1;width:100%;height:calc(100vh - 116px);background:var(--color-surface-ground);overflow:hidden}.excel-ribbon-toolbar{background:#fff;border-bottom:1px solid var(--color-border-medium);padding:.45rem 1.25rem;display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:nowrap;box-shadow:0 1px 3px #0000000a;z-index:40;flex-shrink:0}.excel-toolbar-group{display:flex;align-items:center;gap:.5rem;flex-wrap:nowrap}.excel-toolbar-divider{width:1px;height:20px;background-color:var(--color-border-medium);margin:0 .2rem}.excel-btn-tool{height:32px;padding:0 .75rem;font-size:.82rem;font-weight:600;border-radius:var(--radius-sm);white-space:nowrap}.excel-sheet-viewport{flex:1;width:100%;padding:0;overflow:hidden;background:#fff;display:flex;flex-direction:column;position:relative}.excel-sheet-viewport 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var(--color-brand-primary);outline-offset:-2px;background-color:#ccfbf1}.att-present{background-color:#f0fdf4;color:#15803d}.att-absent{background-color:#fef2f2;color:#b91c1c;font-weight:800}.att-empty{color:#cbd5e1}.badge-absence-exceeded{background-color:var(--status-fail-bg);color:var(--status-fail-text);font-weight:800;border-radius:var(--radius-sm);padding:.25rem .6rem;border:1px solid var(--status-fail-border);font-family:var(--font-mono);font-size:.85rem}.badge-absence-warning{background-color:var(--status-warn-bg);color:var(--status-warn-text);font-weight:800;border-radius:var(--radius-sm);padding:.25rem .6rem;border:1px solid var(--status-warn-border);font-family:var(--font-mono);font-size:.85rem}.badge-absence-ok{background-color:var(--status-pass-bg);color:var(--status-pass-text);font-weight:800;border-radius:var(--radius-sm);padding:.25rem .6rem;border:1px solid var(--status-pass-border);font-family:var(--font-mono);font-size:.85rem}.grade-input{width:54px;text-align:center;font-family:var(--font-mono);font-size:.95rem;font-weight:600;padding:.35rem .2rem;border:1px solid transparent;border-radius:var(--radius-sm);background:transparent;color:var(--color-text-main);transition:all .15s ease}.grade-input:hover{border-color:var(--color-border-medium);background-color:#fff}.grade-input:focus{outline:none;border-color:var(--color-brand-primary);background-color:#fff;box-shadow:0 0 0 2px #0f766e33}.grade-pill-final{display:inline-block;padding:.3rem .7rem;border-radius:var(--radius-sm);font-weight:800;font-size:.95rem;font-family:var(--font-mono);border:1px 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#eab308b3}.weight-resizer-handle.locked:hover:after,.weight-resizer-handle.locked:active:after{background-color:#facc15;border-color:#a16207}.weight-resizer-lock-badge{position:absolute;top:-10px;background-color:#0f172a;color:#facc15;font-size:.65rem;font-weight:800;padding:1px 4px;border-radius:4px;border:1px solid #ca8a04;pointer-events:none;white-space:nowrap;box-shadow:0 1px 3px #0006}.app-footer{margin-top:auto;background-color:#0b1120;border-top:1px solid #1e293b;padding:1.25rem 2rem;color:#94a3b8;font-size:.85rem;z-index:20}.footer-content{max-width:1440px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}.footer-copyright{color:#64748b;font-size:.825rem}.footer-powered{display:flex;align-items:center;gap:.75rem}.footer-powered-text{font-size:.825rem;color:#94a3b8;font-weight:500}.footer-brand-link{display:inline-flex;align-items:center;padding:.15rem .25rem;background:transparent;border:none;transition:transform .25s 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