* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    background: linear-gradient(
        135deg,
        #0b6623,
        #2e8b57,
        #4CAF50
    );

    min-height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;

    padding: 30px;
}

.container {
    width: 450px;

    background: white;

    padding: 30px;

    border-radius: 15px;

    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.students-container {
    width: 95%;
    max-width: 1100px;
}

.header {
    text-align: center;
    margin-bottom: 25px;
}

.header h1 {
    color: #0b6623;
}

.header p {
    color: #555;
}

label {
    display: block;

    margin-top: 15px;

    font-weight: bold;
}

input,
select {
    width: 100%;

    padding: 10px;

    margin-top: 5px;

    border: 1px solid #ccc;

    border-radius: 8px;

    font-size: 14px;
}

input:focus,
select:focus {
    outline: none;

    border-color: #0b6623;
}

button {
    width: 100%;

    margin-top: 20px;

    padding: 12px;

    background: #0b6623;

    color: white;

    border: none;

    border-radius: 8px;

    cursor: pointer;

    font-size: 16px;
}

button:hover {
    background: #228B22;
}

.links {
    text-align: center;
}

.links a {
    color: #0b6623;

    text-decoration: none;

    font-weight: bold;
}

.links a:hover {
    text-decoration: underline;
}

table {
    width: 100%;

    border-collapse: collapse;

    margin-top: 20px;
}

th {
    background: #0b6623;

    color: white;

    padding: 12px;
}

td {
    border: 1px solid #ddd;

    padding: 10px;
}

tr:nth-child(even) {
    background: #f5f5f5;
}

tr:hover {
    background: #e8f5e9;
}