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.btn:nth-child(2){width:100%;order:-1;margin-bottom:4px}.back-to-top{bottom:16px;right:16px;width:44px;height:44px}.settings-toggle{width:36px;height:36px}}*{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #FFFFFF;--bg-secondary: #F1F3F4;--border-color: #E0E0E0;--border-light: #F1F3F4;--text-primary: #202124;--text-secondary: #5F6368;--text-tertiary: #9AA0A6;--color-success: #1E8E3E;--color-error: #D93025;--color-warning: #F9AB00;--color-info: #1A73E8;--bg-success: #E6F4EA;--bg-error: #FCE8E6;--bg-warning: #FEF7E0;--bg-info: #E8F0FE;--safe-area-inset-top: env(safe-area-inset-top, 0px);--safe-area-inset-bottom: env(safe-area-inset-bottom, 0px)}html{font-size:14px;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}body{font-family:Roboto,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.5;min-height:100vh;overflow-x:hidden}.container{max-width:1000px;margin:0 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