.global-nav{position:fixed;left:0;top:0;width:var(--nav-width);height:100vh;background:var(--nav-bg);display:flex;flex-direction:column;align-items:center;padding:4px 0;z-index:1000;overflow-y:auto;overflow-x:hidden}.global-nav::-webkit-scrollbar{width:0}.nav-item-wrapper{position:relative;width:100%;display:flex;flex-direction:column;align-items:center}.nav-item{width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:8px 4px 4px;color:#ffffffbf;cursor:pointer;border:none;background:none;position:relative;transition:background .15s;min-height:52px}.nav-item:hover{background:#ffffff14;color:#fff}.nav-item.active{color:#fff}.nav-item.active:before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;background:var(--nav-active-border);border-radius:0 2px 2px 0}.nav-logo{padding:10px 4px;min-height:56px}.canvas-logo 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h1{font-size:22px;font-weight:var(--font-weight-light)}.calendar-header-center{display:flex;align-items:center;gap:8px}.calendar-nav-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;color:var(--text-primary)}.calendar-nav-btn:hover{background:var(--bg-page)}.calendar-today-btn{padding:5px 12px;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:13px;color:var(--text-primary);background:var(--bg-content)}.calendar-today-btn:hover{background:var(--bg-page)}.calendar-month-label{font-size:18px;font-weight:600;color:var(--text-primary);margin-left:8px}.calendar-view-tabs{display:flex;border:1px solid var(--border-color);border-radius:var(--radius-sm);overflow:hidden}.calendar-view-tab{padding:5px 14px;font-size:13px;color:var(--text-secondary);background:var(--bg-content);border-right:1px solid var(--border-color)}.calendar-view-tab:last-child{border-right:none}.calendar-view-tab.active{background:var(--primary);color:#fff}.calendar-view-tab:hover:not(.active){background:var(--bg-page)}.calendar-grid{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-content)}.calendar-grid-header{display:grid;grid-template-columns:repeat(7,1fr);border-bottom:1px solid var(--border-color)}.calendar-grid-day-name{text-align:center;padding:8px 4px;font-size:12px;font-weight:700;color:var(--text-secondary);text-transform:uppercase}.calendar-grid-body{flex:1;overflow-y:auto}.calendar-grid-week{display:grid;grid-template-columns:repeat(7,1fr);min-height:100px}.calendar-grid-cell{border-right:1px solid var(--border-light);border-bottom:1px solid var(--border-light);padding:4px 6px;cursor:pointer;min-height:100px;transition:background 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var(--border-color);background:var(--bg-content);overflow-y:auto;padding:16px}.calendar-mini{margin-bottom:20px}.calendar-mini-header{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:8px;text-align:center}.calendar-mini-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:1px}.calendar-mini-day-name{text-align:center;font-size:10px;font-weight:700;color:var(--text-secondary);padding:2px}.calendar-mini-day{text-align:center;font-size:11px;padding:3px;border-radius:50%;cursor:pointer;color:var(--text-primary)}.calendar-mini-day.other{color:var(--text-secondary);opacity:.4}.calendar-mini-day:hover{background:var(--bg-page)}.calendar-filters{margin-bottom:20px}.calendar-filters h3{font-size:14px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.calendar-filter-item{display:flex;align-items:center;gap:8px;padding:4px 0;font-size:13px;color:var(--text-primary);cursor:pointer}.calendar-filter-item 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solid var(--border-color);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);min-width:120px;z-index:100;padding:4px 0}.module-dropdown-item{display:block;width:100%;padding:8px 14px;font-size:13px;color:var(--text-primary);text-align:left}.module-dropdown-item:hover{background:var(--bg-page)}.module-dropdown-danger{color:var(--danger)}.module-dropdown-danger:hover{background:var(--danger-light)}.module-items-list{border-top:none}.module-empty-items{padding:16px 20px;color:var(--text-secondary);font-size:13px;font-style:italic}.module-item{display:flex;align-items:center;gap:8px;padding:10px 12px 10px 16px;border-bottom:1px solid var(--border-light);cursor:pointer;transition:background .1s}.module-item:hover{background:#0374b50a}.module-item.sub-header{cursor:default;background:none}.module-item.sub-header 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var(--border-light);background:var(--bg-module-header)}.module-add-item-btn{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--text-secondary);padding:4px 8px;border-radius:var(--radius-sm)}.module-add-item-btn:hover{background:#0000000f;color:var(--text-primary)}.modules-modal{background:var(--bg-content);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);width:420px;max-width:90vw}.modules-modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-light)}.modules-modal-header h3{font-size:16px;font-weight:700}.modules-modal-body{padding:20px}.modal-field{margin-bottom:14px}.modal-field:last-child{margin-bottom:0}.modal-field label{display:block;font-size:13px;font-weight:600;color:var(--text-primary);margin-bottom:4px}.modal-input{width:100%;padding:8px 12px;border:1px solid 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p{font-size:14px;color:var(--text-primary)}.detail-sidebar-meta{font-size:12px;color:var(--text-secondary);margin-top:2px}.needs-grading-count{color:var(--warning)!important;font-weight:600}.status-published{color:var(--success)!important;font-weight:600}.status-unpublished{color:var(--text-secondary)!important}.assignment-form-page h1{font-size:var(--font-size-title);font-weight:var(--font-weight-light);margin-bottom:20px}.assignment-form{background:var(--bg-content);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:24px;max-width:800px}.form-field{margin-bottom:16px}.form-field label{display:block;font-size:13px;font-weight:600;color:var(--text-primary);margin-bottom:4px}.form-input{width:100%;padding:8px 12px;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:var(--font-size-body);color:var(--text-primary);outline:none;background:var(--bg-content);transition:border-color .15s}.form-textarea{width:100%;padding:10px 12px;border:1px 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var(--border-light)}.announcements-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.announcements-header h1{font-size:var(--font-size-title);font-weight:var(--font-weight-light)}.announcements-empty{text-align:center;padding:48px 24px;color:var(--text-secondary)}.announcements-empty svg{margin-bottom:12px;opacity:.4}.announcements-list{display:flex;flex-direction:column;gap:1px;background:var(--border-light);border:1px solid var(--border-color);border-radius:var(--radius-sm);overflow:hidden}.announcement-card{display:flex;align-items:flex-start;gap:12px;padding:16px 16px 16px 20px;background:var(--bg-content);position:relative;transition:background 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