.gradebook-page{background-color:var(--bg-color);color:var(--text-color);padding:24px;min-height:100vh}.container{max-width:1200px;margin:0 auto}.course-toolbar{display:flex;align-items:flex-end;gap:10px;flex-wrap:wrap;margin-bottom:18px;padding:16px 18px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:14px}.course-toolbar .course-picker{min-width:220px;flex:1 1 260px}.course-toolbar .form-label{margin-bottom:5px}.course-actions{display:flex;gap:8px;flex-wrap:wrap}.course-actions .btn{white-space:nowrap;padding:.42rem .7rem;font-size:.95rem;gap:.35rem}.course-actions .course-icon-btn{width:38px;min-width:38px;padding:.42rem}.tabs-container{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap;align-items:center}.tabs-container .btn{flex-shrink:0}.tab-group{display:flex;align-items:center;gap:8px}.settings-tabs{margin-left:auto}.evaluation-controls{display:flex;gap:8px;margin-left:auto}.evaluation-control{width:42px;min-width:42px;padding:.45rem;font-size:1.15rem}.tabs-label{color:var(--text-muted);font-size:14px;font-weight:600;margin-right:2px}.tab{width:108px;min-width:108px}.evaluation-tabs .tab{width:auto;min-width:38px;padding:.42rem .7rem;font-size:.95rem;gap:.35rem}.navigation-tabs .tab,.settings-tabs>.btn{width:auto;min-width:38px;padding:.42rem .7rem;font-size:.95rem;gap:.35rem}@media(max-width:600px){.gradebook-page{padding:.4rem .8rem}.navigation-tabs,.settings-tabs{padding-left:0;border-left:0}.settings-tabs,.evaluation-controls{margin-left:0}}.card{background:var(--bg-card);border-radius:16px;box-shadow:0 1px 3px #0000001a;border:1px solid var(--border-color);overflow:hidden}.card-header{padding:16px 20px;background:var(--bg-card-hover);border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.card-header h2{font-size:15px;font-weight:600}.grade-legend{display:flex;gap:16px;font-size:12px;color:var(--text-muted);align-items:center}.legend-item{display:flex;align-items:center;gap:6px}.legend-dot{width:10px;height:10px;border-radius:50%}.table-responsive{width:100%;overflow:auto;overscroll-behavior-inline:contain;max-height:65vh}thead th{position:sticky;top:0;z-index:15}table{width:100%;border-collapse:separate;border-spacing:0;text-align:left;font-size:14px;white-space:nowrap;background:var(--bg-card);min-width:860px}tbody{background:var(--bg-card)}th,td{padding:0;border-right:1px solid var(--border-color);border-bottom:1px solid var(--border-color);box-sizing:border-box}tr:first-child th{border-top:1px solid var(--border-color)}th:first-child,td:first-child{border-left:1px solid var(--border-color)}th{background:var(--bg-card-hover);color:var(--text-color);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.5px}th.sticky-col{z-index:25}.sticky-col{position:sticky;left:0;background:var(--bg-card);z-index:10;box-shadow:1px 0 0 var(--border-color)}tr:hover .sticky-col{background:var(--bg-card-hover)}tr.selected-row>td{background:var(--bg-card-hover)!important;box-shadow:inset 0 2px 0 var(--purple-primary),inset 0 -2px 0 var(--purple-primary)}.student-cell{width:180px;min-width:180px;height:50px;box-sizing:border-box;padding:8px 12px;vertical-align:middle;font-weight:500}.student-cell .student-name{position:absolute;top:50%;left:12px;right:56px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;transform:translateY(-50%)}.student-column-tools{display:flex;align-items:center;gap:.5rem;margin-top:.5rem;width:100%;text-transform:none;letter-spacing:normal}.student-search{flex:1 1 auto;width:auto;min-width:0;padding:.45rem .65rem;font:inherit;font-size:.95rem;font-weight:400;text-transform:none;color:var(--text-color);background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--border-corners);outline:none}.student-search:focus{border-color:var(--purple-primary);box-shadow:0 0 0 2px var(--shadow-color)}.student-add-button{padding:.45rem .7rem;font-size:.95rem}.student-search-button{flex-shrink:0;padding:.45rem .7rem;font-size:.95rem}.weight-choice{display:flex;flex-direction:column;gap:.55rem;margin-bottom:1rem}.weight-choice label{display:flex;align-items:center;gap:.5rem;color:var(--text-color);cursor:pointer}.weight-choice input[type=radio]{accent-color:var(--purple-primary)}.custom-weight-field[hidden]{display:none}.delete-btn{background:none;border:none;color:#cbd5e1;cursor:pointer;padding:4px;border-radius:4px;transition:color .2s}.delete-btn:hover{color:var(--red-base);background:#fee2e2}.student-config-btn{position:absolute;top:50%;right:12px;padding:.35rem .55rem;font-size:.9rem;transform:translateY(-50%)}.grade-input{width:100%;height:50px;border:none;text-align:center;font-size:14px;font-weight:500;outline:none;background:transparent;color:var(--text-color);padding:0 8px}.grade-input:focus{background:var(--bg-card-hover);box-shadow:inset 0 0 0 2px var(--purple-primary)}.grade-red{color:var(--red-base);font-weight:700}.grade-orange{color:var(--orange-base);font-weight:700}.grade-blue{color:var(--blue-base);font-weight:700}.grade-green{color:var(--green-base);font-weight:700}[data-theme=dark] .grade-red{color:#ff8f85}[data-theme=dark] .grade-orange{color:#ffc078}[data-theme=dark] .grade-blue{color:#9fc1ff}[data-theme=dark] .grade-green{color:#b7d978}.recovery-input{font-weight:700}.attendance-comment{width:100%;min-width:220px;min-height:2.75rem;resize:vertical;padding:.55rem .7rem;font:inherit;color:var(--text-color);background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--border-corners);outline:none}.attendance-comment:focus{border-color:var(--purple-primary);box-shadow:0 0 0 2px var(--shadow-color)}.add-col-btn{width:30px;min-width:30px;height:30px;padding:0;font-size:1rem;color:var(--purple-primary)}.add-col-btn:hover{background:var(--bg-card-hover)}.edit-col-btn{width:20px;min-width:20px;height:20px;margin-left:10px;padding:0;font-size:.7rem;color:var(--text-muted)}.category-title{display:inline-flex;align-items:center;justify-content:center;gap:8px}.modal-overlay{position:fixed;inset:0;background:#0f172a66;backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity .2s}.modal-overlay.open{opacity:1;pointer-events:auto}.modal{background:var(--bg-card);border-radius:20px;width:100%;max-width:650px;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;overflow:hidden;transform:scale(.95);transition:transform .2s}.modal-overlay.open .modal{transform:scale(1)}.modal-header{padding:20px 24px;background:var(--bg-card-hover);border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.modal-header h3{font-size:18px;font-weight:700;color:var(--text-color);display:flex;align-items:center;gap:10px}.close-modal{background:var(--bg-card);border:1px solid var(--border-color);width:32px;height:32px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-muted)}.close-modal:hover{color:var(--text-color);background:var(--bg-card-hover)}.modal-body{padding:24px;max-height:70vh;overflow-y:auto}.modal-footer{padding:16px 24px;background:var(--bg-card-hover);border-top:1px solid var(--border-color);display:flex;justify-content:flex-end;gap:12px}.settings-nav{display:flex;gap:12px;border-bottom:1px solid var(--border-color);margin-bottom:20px;padding-bottom:8px}.settings-tab-btn{background:none;border:none;padding:8px 12px;font-weight:600;font-size:14px;color:var(--text-muted);cursor:pointer;border-bottom:2px solid transparent}.settings-tab-btn.active{color:var(--purple-primary);border-bottom-color:var(--purple-primary)}.form-group{margin-bottom:16px}.form-label{display:block;font-size:12px;font-weight:600;color:var(--text-muted);margin-bottom:6px;text-transform:uppercase}.form-control{width:100%;padding:10px 14px;border:1px solid var(--border-color);border-radius:10px;font-size:14px;outline:none;transition:border-color .2s}.form-control:focus{border-color:var(--purple-primary)}.alert-box{padding:12px 16px;border-radius:10px;font-size:13px;margin-bottom:16px;display:none}.alert-error{background:#fee2e2;color:#991b1b;border:1px solid #fca5a5}.alert-success{background:#dcfce7;color:#166534;border:1px solid #86efac}.category-box{border:1px solid var(--border-color);border-radius:12px;margin-bottom:16px;overflow:hidden;background:var(--bg-card)}.category-header{background:var(--bg-card-hover);padding:12px 16px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color)}.category-body{padding:16px}.subcol-row{display:flex;justify-content:space-between;align-items:center;background:var(--bg-card-hover);padding:8px 12px;border-radius:8px;margin-bottom:8px;border:1px solid var(--border-color)}.evaluation-item{display:flex;justify-content:space-between;align-items:center;background:var(--bg-card);color:var(--text-color);border:1px solid var(--border-color);padding:12px 16px;border-radius:10px}#settingsCriteriaContent form{background:var(--bg-card-hover)!important;border-color:var(--border-color)!important}#settingsCriteriaContent form .form-label{color:var(--text-color)!important}.category-header>div>div{background:var(--bg-card)!important}.attendance-btns{display:flex;justify-content:center;gap:8px}.att-btn{padding:6px 14px;border-radius:8px;border:1px solid var(--border-color);background:#f8fafc;font-size:12px;font-weight:600;cursor:pointer;color:var(--text-muted);transition:all .2s;display:inline-flex;align-items:center;gap:6px}.att-btn.active-present{background:var(--green-base);color:#fff;border-color:var(--green-base);box-shadow:0 2px 4px #05966933}.att-btn.active-absent{background:var(--red-base);color:#fff;border-color:var(--red-base);box-shadow:0 2px 4px #dc262633}.att-btn.active-late{background:var(--orange-base);color:#fff;border-color:var(--orange-base);box-shadow:0 2px 4px #d9770633}.empty-state{padding:48px 24px;text-align:center;color:var(--text-muted)}.empty-state i{font-size:48px;color:#cbd5e1;margin-bottom:16px}