* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f5f5;
    margin: 0;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px hsla(0, 100%, 90%, 0.3);
}

h1, h2 {
    text-align: center;
    color: #d7bde2;
}

.subject {
    background-color: #f9f9f9;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
    border-left: 4px solid #3498db;
}

.subject-title {
    font-weight: bold;
    margin-bottom: 10px;
    color: #2c3e50;
}

.coefficient {
    background-color: #d4e6f1;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 14px;
    margin-right: 10px;
}

.input-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.input-field {
    flex: 1;
    min-width: 150px;
}

label {
    display: block;
    margin-bottom: 5px;
}

input {
    width: 100%;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ddd;
}

.subject-average {
    margin-top: 10px;
    font-weight: bold;
    color: #3498db;
}

button {
    background-color: #d7bde2;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    display: block;
    margin: 30px auto;
}

.result {
    text-align: center;
    font-size: 20px;
    display: none;
}

.final-average {
    font-size: 26px;
    font-weight: bold;
}