:root{--color-bg: #ffffff;--color-text: #1f2937;--color-border: #e5e7eb;--color-bg-secondary: #f9fafb;--color-hover: #f3f4f6;--color-primary: #3b82f6;--color-primary-light: #eff6ff;--color-primary-dark: #1e40af;--color-success: #10b981;--color-warning: #f59e0b;--color-danger: #ef4444;--color-info: #0ea5e9;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease;--z-dropdown: 100;--z-sticky: 50;--z-modal: 200}:root[data-theme=dark]{--color-bg: #111827;--color-text: #f3f4f6;--color-border: #374151;--color-bg-secondary: #1f2937;--color-hover: #2d3748;--color-primary: #60a5fa;--color-primary-light: 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var(--color-primary-light)}input:disabled,textarea:disabled,select:disabled{opacity:.6;cursor:not-allowed}button{font-family:inherit;font-size:inherit;border:none;cursor:pointer;transition:all var(--transition-base);border-radius:var(--radius-md);padding:8px 16px;font-weight:500}button:disabled{opacity:.6;cursor:not-allowed}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:8px 16px;border-radius:var(--radius-md);font-weight:500;transition:all var(--transition-base);cursor:pointer;border:none}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark);box-shadow:var(--shadow-lg)}.btn-secondary{background:var(--color-bg-secondary);color:var(--color-text);border:1px solid 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