:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh}#root{min-height:100vh}*{margin:0;padding:0;box-sizing:border-box}:root[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f8f9fa;--bg-tertiary: #e9ecef;--text-primary: #212529;--text-secondary: #495057;--text-muted: #6c757d;--accent: #0052a3;--accent-hover: #003d7a;--border: #dee2e6;--shadow: rgba(0, 0, 0, .1);--shadow-hover: rgba(0, 0, 0, .15);--glass-bg: rgba(255, 255, 255, .7);--glass-border: rgba(0, 0, 0, .1)}:root[data-theme=dark]{--bg-primary: #0d1117;--bg-secondary: #161b22;--bg-tertiary: #21262d;--text-primary: #e6edf3;--text-secondary: #c9d1d9;--text-muted: #8b949e;--accent: #1f6feb;--accent-hover: #388bfd;--border: #30363d;--shadow: rgba(0, 0, 0, .3);--shadow-hover: rgba(0, 0, 0, .4);--glass-bg: rgba(255, 255, 255, .05);--glass-border: rgba(255, 255, 255, .1)}body{background-color:var(--bg-primary);color:var(--text-primary)}.app{min-height:100vh;display:flex;flex-direction:column;contain:layout style paint}.header{position:sticky;top:0;z-index:100;background-color:var(--bg-primary);border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.nav{max-width:1200px;margin:0 auto;padding:1rem 2rem}.nav-content{display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.5rem;font-weight:600;color:var(--text-primary)}.nav-actions{display:flex;gap:.5rem;align-items:center}.language-toggle{background-color:transparent;border:none;color:var(--text-primary);width:44px;height:44px;border-radius:8px;cursor:pointer;font-size:.875rem;font-weight:600;display:flex;align-items:center;justify-content:center;transition:all .2s 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