:root{--primary-blue: #0056b3;--secondary-blue: #007bff;--light-bg: #f8f9fa;--white: #ffffff;--dark-text: #343a40;--light-text: #6c757d;--border-color: #dee2e6;--shadow: 0 4px 12px rgba(0, 0, 0, .08);--shadow-hover: 0 6px 16px rgba(0, 0, 0, .12);--header-bg: rgba(255, 255, 255, .9);--footer-bg: #343a40;--footer-text: #f8f9fa}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--white);color:var(--dark-text);line-height:1.6}.container{width:90%;max-width:1100px;margin:0 auto}h1,h2,h3{font-weight:700}h2{font-size:2.2rem;margin-bottom:20px;text-align:center;color:var(--dark-text)}h3{color:var(--primary-blue)}.btn{display:inline-block;padding:12px 28px;font-size:1.1rem;font-weight:700;color:var(--white);background-color:var(--secondary-blue);border:none;border-radius:5px;text-decoration:none;cursor:pointer;transition:background-color .3s ease,transform .2s ease;text-transform:uppercase;letter-spacing:.5px}.btn:hover{background-color:var(--primary-blue);transform:translateY(-2px)}:root{--primary-color: #007bff;--secondary-color: #6c757d;--background-color: #f8f9fa;--text-color: #212529;--header-bg: #ffffff;--footer-bg: #343a40;--footer-text: #f8f9fa;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}body{margin:0;font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--background-color);color:var(--text-color);line-height:1.6}a{color:var(--primary-color);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1100px;margin:0 auto;padding:0 20px}.btn{display:inline-block;padding:10px 20px;background-color:var(--primary-color);color:#fff;border:none;border-radius:5px;cursor:pointer;font-size:1rem;transition:background-color .3s ease}.btn:hover{background-color:#0056b3;text-decoration:none}input[type=text],input[type=email],textarea{width:100%;padding:10px;margin-bottom:15px;border:1px solid #ccc;border-radius:5px;box-sizing:border-box}