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:before, ::after { box-sizing: border-box; } / Remove list styles on ul, ol elements and reset rules for li items / ul[class], ol[class] { list-style: none; } / Reset anchor element styles / a { text-decoration: none; } / Remove padded and border styles on table elements / table { border-collapse: collapse; border-spacing: 0; padding: 0; } / Remove default field appearance and reset appearance of number input fields / input, button, textarea, select { font: inherit; margin: 0; outline: none; padding: 0; border: none; background: transparent; } / Remove appearance of select element / select { appearance: none; } / Body styles / body { font-family: 'Helvetica', 'Arial', sans-serif; background-color: f5f5f5; } / Header styles / header { display: flex; justify-content: space-between; align-items: center; padding: 20px; background-color: 000; color: fff; } header h1 { margin: 0; } / Main content styles / main { max-width: 600px; margin: 0 auto; padding: 20px; } / Card styles / .card { background-color: fff; padding: 20px; margin-bottom: 20px; } / Form styles / form { display: flex; flex-direction: column; gap: 20px; } / Label styles / label { font-weight: bold; margin-bottom: 5px; } / Input styles / input[type="text"], input[type="email"] { width: 100%; padding: 10px; border: 1px solid ccc; } / Button styles / button { padding: 10px 20px; background-color: 000; color: fff; border: none; cursor: pointer; } button:hover { background-color: 333; } / Error message styles / .error-message { color: d32f2f; font-size: 12px; } ```