*{
    margin: 0;
    padding: 0;
}
body{
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

h1{
    color: white;
    text-align: center;
    margin-bottom: 30px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    font-size: 2.5em;
}

h2{
    color: #333;
    margin-top: 30px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 3px solid #667eea;
}

form{
    background: white;
    border-radius: 10px;
    padding: 25px;
    max-width: 500px;
    margin: 0 auto 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

form input, form select{
    width: 100%;
    margin: 10px 0;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    box-sizing: border-box;
    transition: 0.3s;
}

form input:focus, form select:focus{
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 5px rgba(102, 126, 234, 0.5);
}

form button{
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    width: 100%;
    margin-top: 15px;
    transition: 0.3s;
}

form button:hover{
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(102, 126, 234, 0.4);
}

#marksForm{
    background: white !important;
    border-radius: 10px;
    max-width: 500px;
    margin: 0 auto 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

#marksForm input, #marksForm select{
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 2px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 14px;
}

#marksForm button{
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin: 5px;
    font-weight: bold;
    transition: 0.3s;
}

#marksForm button:hover{
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.4);
}

table{
    width: 100%;
    max-width: 1200px;
    margin: 30px auto;
    background: white;
    border-collapse: collapse;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

table thead{
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

table th, table td{
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

table tbody tr:hover{
    background-color: #f0f0ff;
}

table tbody tr:nth-child(even){
    background-color: #f9f9ff;
}

table button{
    background: #667eea;
    color: white;
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin: 2px;
    font-size: 12px;
    transition: 0.3s;
}

table button:hover{
    background: #764ba2;
    transform: scale(1.05);
}