:root{--bg-primary:#090d16;--bg-secondary:#0f1524;--bg-surface:#151d30;--bg-elevated:#1e293b;--bg-glass:#1e293b66;--bg-glass-hover:#1e293bb3;--border-subtle:#94a3b814;--border-medium:#94a3b829;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--accent-primary:#3b82f6;--accent-hover:#2563eb;--accent-light:#3b82f614;--accent-gradient:linear-gradient(135deg, #3b82f6, #1d4ed8);--accent-gradient-hover:linear-gradient(135deg, #2563eb, #1e40af);--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--priority-low:#3b82f6;--priority-medium:#f59e0b;--priority-high:#ef4444;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--shadow-sm:0 1px 2px #0003;--shadow-md:0 4px 6px -1px #0000004d, 0 2px 4px -1px #0003;--shadow-lg:0 10px 15px -3px #0006, 0 4px 6px -2px #0000004d;--transition-fast:.12s cubic-bezier(.4, 0, .2, 1);--transition-normal:.2s cubic-bezier(.4, 0, .2, 1);--font:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--sidebar-width:250px}[data-theme=light]{--bg-primary:#f8fafc;--bg-secondary:#fff;--bg-surface:#fff;--bg-elevated:#f1f5f9;--bg-glass:#ffffffbf;--bg-glass-hover:#fffffff2;--border-subtle:#e2e8f0;--border-medium:#cbd5e1;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--accent-primary:#2563eb;--accent-hover:#1d4ed8;--accent-light:#2563eb14;--accent-gradient:linear-gradient(135deg, #2563eb, #1d4ed8);--accent-gradient-hover:linear-gradient(135deg, #1d4ed8, #1e40af);--success:#059669;--warning:#d97706;--danger:#dc2626;--priority-low:#2563eb;--priority-medium:#d97706;--priority-high:#dc2626;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px -1px #00000014, 0 2px 4px -1px #0000000a;--shadow-lg:0 10px 15px -3px #0000000f, 0 4px 6px -2px 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p.subtitle{color:var(--text-secondary);margin-bottom:24px;font-size:.9rem}.auth-card .error-msg{color:var(--danger);border-radius:var(--radius-md);background:#dc262614;border:1px solid #dc262629;margin-bottom:16px;padding:8px 12px;font-size:.85rem}.form-group{margin-bottom:16px}.form-group label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.03em;margin-bottom:6px;font-size:.78rem;font-weight:600;display:block}input,select,textarea{background:var(--bg-primary);border:1px solid var(--border-medium);border-radius:var(--radius-md);width:100%;color:var(--text-primary);font-family:var(--font);transition:border-color var(--transition-fast), box-shadow var(--transition-fast);outline:none;padding:10px 12px;font-size:.92rem}input:focus,select:focus,textarea:focus{border-color:var(--accent-primary);box-shadow:0 0 0 2px var(--accent-light)}textarea{resize:vertical;min-height:80px}select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg 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10px}.btn-ghost:hover{background:var(--bg-glass-hover);color:var(--text-primary)}.btn-danger{color:var(--danger);background:#dc262614;border:1px solid #dc262629}.btn-danger:hover{background:#dc262629}.btn-sm{padding:5px 10px;font-size:.8rem}.btn-full{width:100%}.btn-icon{border-radius:var(--radius-sm);background:var(--bg-glass);border:1px solid var(--border-subtle);width:32px;height:32px;color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);justify-content:center;align-items:center;padding:0;display:inline-flex}.btn-icon:hover{background:var(--bg-glass-hover);color:var(--text-primary)}.app-layout{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border-subtle);z-index:100;transition:transform var(--transition-normal), background var(--transition-normal), border var(--transition-normal);flex-direction:column;padding:20px 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.item-text{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.calendar-day-item-more{color:var(--text-muted);margin-top:1px;padding-left:6px;font-size:.68rem;font-weight:600}.exam-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);transition:border-color var(--transition-fast), transform var(--transition-fast);padding:16px;position:relative;overflow:hidden}.exam-card:before{content:"";width:3px;height:100%;position:absolute;top:0;left:0}.exam-card:hover{border-color:var(--border-medium)}.exam-title{color:var(--text-primary);margin-bottom:6px;font-size:.95rem;font-weight:600}.exam-meta{color:var(--text-secondary);align-items:center;gap:8px;margin-bottom:4px;font-size:.78rem;display:flex}.coeff-badge{background:var(--bg-elevated);color:var(--text-secondary);border-radius:100px;align-items:center;padding:1px 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var(--border-subtle);border-radius:var(--radius-lg);padding:16px}.stat-value{color:var(--text-primary);font-size:1.45rem;font-weight:700}.stat-label{color:var(--text-muted);margin-top:2px;font-size:.75rem}.empty-state{text-align:center;color:var(--text-muted);padding:30px 16px}.empty-state .empty-icon{margin-bottom:8px;font-size:2rem}.empty-state p{font-size:.85rem}.color-picker-grid{flex-wrap:wrap;gap:8px;display:flex}.color-swatch{cursor:pointer;width:28px;height:28px;transition:all var(--transition-fast);border:2px solid #0000;border-radius:50%}.color-swatch:hover{transform:scale(1.1)}.color-swatch.selected{border-color:var(--text-primary);box-shadow:0 0 0 2px var(--border-medium)}.item-actions{opacity:0;transition:opacity var(--transition-fast);flex-shrink:0;gap:4px;margin-left:auto;display:flex}.task-item:hover .item-actions,.log-entry:hover .item-actions,.event-card:hover .item-actions,.exam-card:hover .item-actions{opacity:1}@media (width<=768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0;padding:20px 16px}.calendar-day{min-height:60px}.card-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(2,1fr)}.calendar-day-items{display:none}.day-dots{display:flex}}@media (width>=769px){.day-dots{display:none}}.loading-spinner{justify-content:center;align-items:center;padding:40px;display:flex}.spinner{border:2px solid var(--border-medium);border-top-color:var(--accent-primary);border-radius:50%;width:28px;height:28px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.toggle-row{background:var(--bg-elevated);border-radius:var(--radius-md);gap:2px;padding:2px;display:flex}.toggle-btn{border-radius:var(--radius-sm);color:var(--text-secondary);font-family:var(--font);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;flex:1;padding:6px 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