*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-bg: #f8fafc;--color-surface: #ffffff;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-text: #1e293b;--color-text-muted: #64748b;--color-border: #e2e8f0;--color-success: #16a34a;--color-danger: #dc2626;--color-warning: #f59e0b;--radius: 8px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1)}body{font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;-webkit-font-smoothing:antialiased}button{cursor:pointer;font-family:inherit;font-size:.875rem;font-weight:500;border:none;border-radius:var(--radius);padding:.625rem 1.25rem;transition:all .15s ease}button:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-danger{background:var(--color-danger);color:#fff}.btn-danger:hover:not(:disabled){background:#b91c1c}.btn-secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background:#f1f5f9}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow-sm)}