:root{--primary: #667eea;--primary-dark: #764ba2;--text-primary: #2d3748;--text-secondary: #4a5568;--text-muted: #a0aec0;--border-color: #e2e8f0;--bg: #f7fafc;--surface: #ffffff;--bg-secondary: #f0f0f5;--input-bg: #ffffff;--shadow: rgba(0, 0, 0, .06)}.dark-theme{--primary: #7c8ff8;--primary-dark: #9b6fc5;--text-primary: #e2e8f0;--text-secondary: #a0aec0;--text-muted: #636e7f;--border-color: #2d3748;--bg: #0f1117;--surface: #1a1d2e;--bg-secondary: #1e2233;--input-bg: #1e2233;--shadow: rgba(0, 0, 0, .3)}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden}h1,h2,h3,h4,h5,h6{margin:0}button{font-family:inherit}