*{margin:0;padding:0;box-sizing:border-box}:root,:root[data-theme=dark]{--color-bg: #0f172a;--color-bg-secondary: #1e293b;--color-bg-tertiary: #334155;--color-text: #f1f5f9;--color-text-secondary: #cbd5e1;--color-text-muted: #94a3b8;--color-primary: #3b82f6;--color-success: #22c55e;--color-error: #ef4444;--color-border: #475569;--spacing-xs: .5rem;--spacing-sm: .75rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--border-radius: 8px;--border-radius-sm: 6px;--transition: all .2s ease}:root[data-theme=light]{--color-bg: #ffffff;--color-bg-secondary: #f8fafc;--color-bg-tertiary: #e2e8f0;--color-text: #0f172a;--color-text-secondary: #475569;--color-text-muted: #64748b;--color-primary: #2563eb;--color-success: #16a34a;--color-error: #dc2626;--color-border: #cbd5e1}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica 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solid var(--color-border);border-radius:4px;font-family:Monaco,Menlo,Courier New,monospace;font-size:.875rem;color:var(--color-text)}.help-hint{font-size:.9rem;color:var(--color-text-muted);font-style:italic;margin:var(--spacing-xs) 0}.help-example{display:flex;gap:var(--spacing-lg);margin-top:var(--spacing-sm);padding:var(--spacing-md);background-color:var(--color-bg);border-radius:var(--border-radius);border:1px solid var(--color-border)}.help-example-column{flex:1;display:flex;flex-direction:column;gap:var(--spacing-sm);align-items:center}.help-example-column h5{font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-secondary);margin:0}.help-diagrams{display:flex;flex-direction:column;gap:var(--spacing-xs);align-items:center}.help-diagram-wrapper{position:relative;display:flex;flex-direction:column;align-items:center;border-radius:var(--border-radius-sm);border:3px solid transparent;transition:var(--transition)}.help-correct-answer{border-color:var(--color-success);box-shadow:0 0 8px #22c55e4d}.help-link{color:var(--color-primary);text-decoration:none;font-weight:500;transition:var(--transition)}.help-link:hover{text-decoration:underline;color:#2563eb}@media (max-width: 767px){.help-modal{max-width:100%;padding:var(--spacing-lg)}.help-example{flex-direction:column;gap:var(--spacing-lg)}.help-example-column h5{font-size:.85rem}.help-diagrams{flex-direction:row;flex-wrap:wrap;gap:var(--spacing-xs);justify-content:center}}.streak-display{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);background-color:var(--color-bg-tertiary);border:1px solid var(--color-border);border-radius:var(--border-radius);font-size:.95rem;color:var(--color-text-secondary);position:relative;transition:var(--transition)}.streak-display:hover{background-color:var(--color-border)}.streak-emoji{font-size:1.2rem}.streak-text{font-weight:500;white-space:nowrap}.streak-tooltip{position:absolute;bottom:100%;left:50%;transform:translate(-50%);margin-bottom:8px;padding:var(--spacing-xs) var(--spacing-sm);background-color:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--border-radius-sm);font-size:.85rem;color:var(--color-text);white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s ease;box-shadow:0 4px 12px #0000004d}.streak-display:hover .streak-tooltip{opacity:1}.streak-display-desktop{position:absolute;bottom:var(--spacing-lg);left:50%;transform:translate(-50%);z-index:10}.streak-display-mobile{width:100%;justify-content:center;font-size:1rem;padding:var(--spacing-md);border:2px solid var(--color-primary);background-color:var(--color-bg);align-items:center}.streak-display-mobile .streak-emoji{align-self:flex-start;margin-top:2px}.streak-display-mobile:hover{transform:none}.streak-mobile-content{display:flex;flex-direction:column;gap:4px;align-items:center}.streak-text-muted{font-size:.85rem;color:var(--color-text-muted);font-weight:400}@media (max-width: 767px){.streak-display-desktop{display:none}}.app-footer{position:relative}