:root{--purple-start: #667eea;--purple-end: #764ba2;--primary: #764ba2;--primary-dark: #5c3a7d;--text-primary: #1f2937;--text-secondary: #6b7280;--text-light: #9ca3af;--bg-primary: #ffffff;--bg-secondary: #f9fafb;--bg-tertiary: #f3f4f6;--border: #e5e7eb;--success: #10b981;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--radius-md: 8px;--radius-lg: 12px;--max-width: 720px;--container-width: 1200px}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:var(--font-sans);font-size:1rem;line-height:1.6;color:var(--text-primary);background:var(--bg-primary);min-height:100vh}a{color:var(--primary);text-decoration:none;transition:color .2s}a:hover{color:var(--primary-dark);text-decoration:underline}h1,h2,h3{font-weight:600;line-height:1.25;margin-top:0;margin-bottom:1rem}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}.container{max-width:var(--container-width);margin:0 auto;padding:0 1rem}@media(max-width:768px){h1{font-size:2rem}h2{font-size:1.75rem}.container{padding:0 .75rem}}