:root{--bg:#f0f4f8;--card-bg:#fff;--text:#1a202c;--text-secondary:#4a5568;--text-muted:#718096;--border:#e2e8f0;--primary:#4f6ef7;--primary-hover:#3b54e0;--primary-light:#eef1ff;--danger:#e53e3e;--danger-light:#fff5f5;--success:#38a169;--success-light:#f0fff4;--warning:#d69e2e;--warning-light:ivory;--radius:12px;--radius-sm:8px;--shadow:0 1px 3px #0000001a, 0 1px 2px #0000000f;--shadow-md:0 4px 6px #00000012, 0 2px 4px #0000000f;--transition:.2s ease;--font:"Segoe UI", system-ui, -apple-system, sans-serif;--input-bg:#fafbfc;--input-bg-focus:#fff;--hover-bg:#f7fafc;--subtle-bg:#f0f4f8}[data-theme=dark]{--bg:#0f1420;--card-bg:#171d2b;--text:#e6e9ef;--text-secondary:#b8c0cc;--text-muted:#7c8698;--border:#2a3244;--primary:#7c93ff;--primary-hover:#94a7ff;--primary-light:#232a44;--danger:#f56565;--danger-light:#3a1f22;--success:#48bb78;--success-light:#1c3327;--warning:#ecc94b;--warning-light:#3a331a;--shadow:0 1px 3px #0006, 0 1px 2px #0000004d;--shadow-md:0 4px 6px #0006, 0 2px 4px #0000004d;--input-bg:#1f2534;--input-bg-focus:#232a3c;--hover-bg:#1f2534;--subtle-bg:#232a3c}[data-theme=dark] .grade-b{color:#7cb8f0;background:#1a2b3a}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6}button{font-family:var(--font)}.auth-page{justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.auth-card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);width:100%;max-width:380px;padding:32px}.auth-card-top{justify-content:flex-end;margin-bottom:4px;display:flex}.auth-title{color:var(--text);font-size:1.6rem;font-weight:700}.auth-subtitle{color:var(--text-muted);margin-top:6px;margin-bottom:20px;font-size:.95rem}.auth-form{flex-direction:column;gap:10px;display:flex}.auth-form label{color:var(--text-secondary);font-size:.85rem;font-weight:600}.auth-form input{border:2px solid var(--border);border-radius:var(--radius-sm);background:var(--input-bg);padding:10px 14px;font-size:.95rem}.auth-form input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #4f6ef71a}.auth-form button{border-radius:var(--radius-sm);background:var(--primary);color:#fff;cursor:pointer;transition:var(--transition);border:none;margin-top:6px;padding:10px 16px;font-weight:600}.auth-form button:hover{background:var(--primary-hover)}.auth-form button:disabled{opacity:.7;cursor:default}.auth-sent{color:var(--text-secondary)}.auth-error{color:var(--danger);font-size:.9rem}.dashboard-shell{min-height:100vh}.dashboard-nav{background:var(--card-bg);border-bottom:1px solid var(--border);align-items:center;gap:24px;padding:14px 24px;display:flex}.dashboard-nav .brand{color:var(--text);font-size:1.1rem;font-weight:700;text-decoration:none}.dashboard-nav-links{flex:1;gap:16px;display:flex}.dashboard-nav-links a{color:var(--text-secondary);font-size:.9rem;font-weight:500;text-decoration:none}.dashboard-nav-links a:hover{color:var(--primary)}.dashboard-nav-right{align-items:center;gap:14px;display:flex}.user-email{color:var(--text-muted);font-size:.85rem}.signout-btn{border:2px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;color:var(--text-secondary);transition:var(--transition);background:0 0;padding:6px 12px;font-size:.85rem}.signout-btn:hover{background:var(--hover-bg);border-color:#cbd5e0}.dashboard-content{max-width:800px;margin:0 auto;padding:24px 20px}.overview h1{font-size:1.6rem;font-weight:700}.overview-sub{color:var(--text-muted);margin-top:4px;margin-bottom:20px}.overview-cards{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;display:grid}.overview-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);box-shadow:var(--shadow);transition:var(--transition);padding:20px;text-decoration:none;display:block}.overview-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.overview-card h2{margin-bottom:6px;font-size:1.05rem}.overview-card p{color:var(--text-muted);font-size:.9rem}.overview-card-disabled{opacity:.6;cursor:default}.overview-card-disabled:hover{box-shadow:var(--shadow);transform:none}.grades-page{flex-direction:column;gap:20px;display:flex}.class-bar{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:12px;padding:12px 16px;display:flex}.class-bar label{color:var(--text-secondary);font-size:.9rem;font-weight:600}.class-select{border:2px solid var(--border);border-radius:var(--radius-sm);background:var(--input-bg);flex:1;min-width:150px;padding:8px 12px;font-size:.95rem}.class-select-empty{color:var(--text-muted);flex:1;font-size:.9rem}.class-btn{border:2px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;color:var(--text-secondary);transition:var(--transition);background:0 0;padding:8px 12px;font-size:.85rem;font-weight:500}.class-btn:hover{background:var(--hover-bg);border-color:#cbd5e0}.class-btn.danger{color:var(--danger);border-color:#fed7d7}.class-btn.danger:hover{background:var(--danger-light);border-color:#feb2b2}.class-btn.primary{color:var(--primary);border-color:#c3d0ff}.class-btn.primary:hover{background:var(--primary-light);border-color:var(--primary)}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);padding:24px}.card-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:16px;display:flex}.card-header h2{font-size:1.1rem;font-weight:600}.badge{border-radius:20px;padding:4px 10px;font-size:.8rem;font-weight:500}.badge-warning{background:var(--warning-light);color:#975a16}.badge-success{background:var(--success-light);color:#276749}.form-grid{grid-template-columns:1fr 1fr;gap:14px;display:grid}@media (max-width:500px){.form-grid{grid-template-columns:1fr}}.form-group{flex-direction:column;gap:4px;display:flex}.form-group.full-width{grid-column:1/-1}.form-group label{color:var(--text-secondary);font-size:.85rem;font-weight:600}.form-group input{border:2px solid var(--border);border-radius:var(--radius-sm);background:var(--input-bg);padding:10px 14px;font-size:.95rem}.form-group input:focus{border-color:var(--primary);background:var(--input-bg-focus);outline:none;box-shadow:0 0 0 3px #4f6ef71a}.form-actions{flex-wrap:wrap;gap:10px;margin-top:14px;display:flex}.btn{border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);border:none;padding:10px 20px;font-size:.9rem;font-weight:600}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover);box-shadow:var(--shadow-md)}.btn-outline{border:2px solid var(--border);color:var(--text-secondary);background:0 0}.btn-outline:hover{background:var(--hover-bg);border-color:#cbd5e0}.btn-danger-sm,.btn-edit-sm{cursor:pointer;background:0 0;border-radius:6px;padding:6px 12px;font-size:.8rem;font-weight:500}.btn-danger-sm{color:var(--danger);border:1px solid #fed7d7}.btn-danger-sm:hover{background:var(--danger-light)}.btn-edit-sm{border:1px solid var(--border);color:var(--primary)}.btn-edit-sm:hover{background:var(--primary-light)}.empty-state{text-align:center;color:var(--text-muted);padding:20px 0}.grade-summary{flex-wrap:wrap;align-items:center;gap:20px;display:flex}.grade-circle{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:90px;height:90px;font-size:1.1rem;font-weight:700;display:flex}.grade-a{background:var(--success-light);color:var(--success)}.grade-b{color:#2b6cb0;background:#ebf8ff}.grade-c{background:var(--warning-light);color:#975a16}.grade-d,.grade-f{background:var(--danger-light);color:var(--danger)}.grade-details{flex-direction:column;gap:4px;display:flex}.big-label{font-size:1.1rem;font-weight:700}.sub-info,.max-possible{color:var(--text-muted);font-size:.9rem}.category-list{flex-direction:column;gap:12px;display:flex}.category-row{border-bottom:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:16px;padding:12px 0;display:flex}.category-row:last-child{border-bottom:none}.cat-info{flex:1;min-width:160px}.cat-name{font-weight:600}.cat-meta{color:var(--text-muted);font-size:.85rem}.remaining{color:var(--danger);font-weight:500}.complete{color:var(--success)}.cat-stats{text-align:right}.cat-pct{font-weight:700}.cat-contrib{color:var(--text-muted);font-size:.8rem}.cat-actions{gap:6px;display:flex}.priority-list{flex-direction:column;gap:12px;display:flex}.priority-item{border-radius:var(--radius-sm);border:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:14px;padding:12px;display:flex}.priority-rank{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:.85rem;font-weight:700;display:flex}.rank-high{background:var(--danger)}.rank-medium{background:var(--warning)}.rank-low{background:var(--primary)}.rank-done{background:var(--success)}.priority-info{flex:1;min-width:160px}.priority-name{font-weight:600}.priority-detail{color:var(--text-muted);font-size:.85rem}.priority-boost{color:var(--text-secondary);white-space:nowrap;font-size:.85rem}.priority-whatif{color:var(--text-muted);align-items:center;gap:6px;font-size:.8rem;display:flex}.priority-whatif input{border:1px solid var(--border);text-align:center;border-radius:6px;width:56px;padding:4px 6px}.projected-grade{border-top:1px solid var(--border);margin-top:16px;padding-top:16px;font-size:1rem}.assignment-list{flex-direction:column;gap:10px;display:flex}.assignment-row{border:1px solid var(--border);border-radius:var(--radius-sm);flex-wrap:wrap;align-items:center;gap:14px;padding:12px;display:flex}.assignment-checkbox{cursor:pointer;flex-shrink:0;width:18px;height:18px}.assignment-info{flex:1;min-width:160px}.assignment-title{font-weight:600}.assignment-desc{color:var(--text-muted);margin-top:2px;font-size:.85rem}.due-badge{white-space:nowrap;border-radius:20px;padding:4px 10px;font-size:.8rem;font-weight:600}.due-overdue{background:var(--danger-light);color:var(--danger)}.due-today,.due-soon{background:var(--warning-light);color:#975a16}.due-normal{background:var(--subtle-bg);color:var(--text-secondary)}.assignment-done{opacity:.6}.assignment-done .assignment-title{text-decoration:line-through}.board-layout{gap:20px;height:65vh;min-height:420px;display:flex}.board-sidebar{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;flex-shrink:0;gap:12px;width:200px;padding:16px;display:flex;overflow-y:auto}.board-sidebar-header{justify-content:space-between;align-items:center;display:flex}.board-sidebar-header h2{font-size:1rem}.channel-list{flex-direction:column;gap:4px;list-style:none;display:flex}.channel-item{text-align:left;border-radius:var(--radius-sm);cursor:pointer;width:100%;color:var(--text-secondary);background:0 0;border:none;padding:8px 10px;font-size:.9rem}.channel-item:hover{background:var(--hover-bg)}.channel-item.active{background:var(--primary-light);color:var(--primary);font-weight:600}.board-main{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;flex:1;min-width:0;display:flex;overflow:hidden}.board-main-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:14px 20px;display:flex}.board-main-header h2{font-size:1.05rem}.message-list{flex-direction:column;flex:1;gap:12px;padding:16px 20px;display:flex;overflow-y:auto}.message-row{max-width:75%}.message-row.own{text-align:right;align-self:flex-end}.message-sender{color:var(--text-muted);margin-bottom:2px;font-size:.75rem;font-weight:600}.message-body{background:var(--subtle-bg);word-break:break-word;border-radius:12px;padding:8px 12px;font-size:.9rem;display:inline-block}.message-row.own .message-body{background:var(--primary);color:#fff}.message-time{color:var(--text-muted);margin-top:2px;font-size:.7rem}.message-form{border-top:1px solid var(--border);gap:10px;padding:14px 20px;display:flex}.message-form input{border:2px solid var(--border);border-radius:var(--radius-sm);background:var(--input-bg);flex:1;padding:10px 14px;font-size:.9rem}.message-form input:focus{border-color:var(--primary);background:var(--input-bg-focus);outline:none;box-shadow:0 0 0 3px #4f6ef71a}.settings-field{margin-bottom:20px}.toast{color:#fff;border-radius:var(--radius-sm);box-shadow:var(--shadow-md);z-index:100;background:#0f1420eb;padding:10px 18px;font-size:.9rem;position:fixed;bottom:24px;left:50%;transform:translate(-50%)}