:root{--bg-primary:#f8fafc;--bg-secondary:#fff;--text-primary:#0f172a;--text-secondary:#64748b;--border-color:#e2e8f0;--accent-color:#3b82f6;--accent-hover:#2563eb;--danger-color:#ef4444;--success-color:#10b981;--warning-color:#f59e0b;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--radius-md:.5rem;--radius-lg:.75rem;--radius-full:9999px;--glass-bg:#ffffffb3;--glass-border:#ffffff4d}[data-theme=dark]{--bg-primary:#0f172a;--bg-secondary:#1e293b;--text-primary:#f8fafc;--text-secondary:#94a3b8;--border-color:#334155;--accent-color:#3b82f6;--accent-hover:#60a5fa;--shadow-sm:0 1px 2px 0 #0000004d;--shadow-md:0 4px 6px -1px #0006, 0 2px 4px -2px #0000004d;--shadow-lg:0 10px 15px -3px #00000080, 0 4px 6px -4px 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h3{color:var(--text-primary);margin-bottom:.5rem}.mt-4{margin-top:1.5rem}.loading-screen{height:100vh;color:var(--text-secondary);flex-direction:column;justify-content:center;align-items:center;gap:1rem;display:flex}.loader{border:3px solid #3b82f633;border-top-color:var(--accent-color);border-radius:50%;width:40px;height:40px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (width<=768px){.menu-btn,.mobile-header{display:flex}.new-task-btn span,.new-task-btn{display:none}.floating-action-btn{display:flex}.top-header{border-bottom:none;margin-bottom:1rem}}