:root{--primary-blue: #0066CC;--secondary-blue: #00A3E0;--tertiary-blue: #0088CC;--user-message-bg: #0066CC;--bot-message-bg: #F5F5F5;--accent-bg: #F0F8FF;--text-primary: #333333;--text-secondary: #666666;--text-light: #999999;--border-color: #E0E0E0;--success-bg: #E8F5E9;--warning-bg: #FFF3E0;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif}body{margin:0;font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f5f5;color:var(--text-primary);line-height:1.5}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}*{box-sizing:border-box}button{font-family:var(--font-family);cursor:pointer;border:none;border-radius:8px;padding:10px 20px;font-size:16px;transition:background-color .2s ease}button.primary,button[type=submit],.MuiButton-containedPrimary{background-color:var(--primary-blue);color:#fff}button.primary:hover,button[type=submit]:hover,.MuiButton-containedPrimary:hover{background-color:#0052a3}button.secondary{background-color:var(--secondary-blue);color:#fff}button.secondary:hover{background-color:#0088b8}a{color:var(--primary-blue);text-decoration:none;transition:color .2s ease}a:hover{color:#0052a3;text-decoration:underline}.tab-active,.nav-active,.MuiTab-root.Mui-selected{color:var(--primary-blue)!important;border-bottom-color:var(--primary-blue)}.tab-indicator,.MuiTabs-indicator{background-color:var(--primary-blue)!important}.message-user,.user-message{background-color:var(--user-message-bg);color:#fff;padding:12px 16px;border-radius:16px;margin:8px 0}.message-bot,.bot-message,.coach-message{background-color:var(--bot-message-bg);color:var(--text-primary);padding:12px 16px;border-radius:16px;margin:8px 0}.divider,hr,.MuiDivider-root{border-color:var(--border-color)}.card,.paper,.MuiPaper-root{border:1px solid var(--border-color)}.success,.success-message{background-color:var(--success-bg);color:#2e7d32}.warning,.warning-message{background-color:var(--warning-bg);color:#e65100}.info,.info-message{background-color:var(--accent-bg);color:var(--primary-blue)}h1{font-size:24px;font-weight:600;color:#333;line-height:1.3;margin-bottom:16px}h2{font-size:18px;font-weight:600;color:#333;line-height:1.3;margin-bottom:12px}h3{font-size:16px;font-weight:600;color:#333;line-height:1.3;margin-bottom:8px}p{font-size:14px;line-height:1.5;margin-bottom:12px}small{font-size:12px;color:#999;line-height:1.4}input,textarea,select{font-size:16px;font-family:inherit;line-height:1.5}.text-xs{font-size:12px}.text-sm{font-size:14px}.text-base{font-size:16px}.text-lg{font-size:18px}.text-xl{font-size:24px}.font-normal{font-weight:400}.font-medium{font-weight:500}.font-semibold{font-weight:600}.font-bold{font-weight:700}.text-primary{color:#333}.text-secondary{color:#666}.text-light{color:#999}.text-blue{color:var(--primary-blue, #0066CC)}.text-left{text-align:left}.text-center{text-align:center}.text-right{text-align:right}.leading-tight{line-height:1.25}.leading-normal{line-height:1.5}.leading-relaxed{line-height:1.75}@media(max-width:320px){h1{font-size:20px}h2{font-size:16px}h3{font-size:14px}p{font-size:13px}}@media(min-width:768px){h1{font-size:28px}h2{font-size:20px}h3{font-size:18px}p{font-size:16px}}