body {
			font-family: Arial, sans-serif;
			background-color: #f9f9f9;
			margin: 0;
			padding: 20px;
			color: #333;
		}
		.container {
			max-width: 900px;
			margin: 0 auto;
			background: #fff;
			border-radius: 8px;
			box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
			padding: 24px;
		}
		h1 {
			text-align: center;
			margin-bottom: 16px;
		}
		table {
			width: 100%;
			border-collapse: collapse;
			margin-top: 16px;
		}
		caption {
			caption-side: bottom;
			text-align: left;
			margin-top: 15px;
			font-size: 1rem;
		}
		th, td {
			padding: 12px 10px;
			border: 1px solid #dde2e6;
			text-align: left;
		}
		th {
			background-color: #f1f5f9;
		}
		tbody tr:nth-child(even) {
			background-color: #fcfcfc;
		}
		.grade-A {
			color: #25c178;
			font-weight: 600;
		}
		.grade-B {
			color: #1690a6;
			font-weight: 600;
		}
		.grade-C {
			color: #9d7707;
			font-weight: 600;
		}
		.grade-D {
			color: #c93131;
			font-weight: 600;
		}