* {
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    margin: 0;
    padding: 0;
    background: #f4f6f8;
}

header {
    background: #2c3e50;
    color: white;
    padding: 15px;
    text-align: center;
}

section {
    background: white;
    margin: 20px;
    padding: 20px;
    border-radius: 6px;
}

form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

form button {
    grid-column: span 2;
    padding: 10px;
    background: #3498db;
    color: white;
    border: none;
    cursor: pointer;
}

form button:hover {
    background: #2980b9;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 10px;
    border-bottom: 1px solid #ddd;
    text-align: center;
}

.delete-btn {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 5px 8px;
    cursor: pointer;
}

.delete-btn:hover {
    background: #c0392b;
}

.summary {
    display: flex;
    justify-content: space-around;
    font-weight: bold;
}

@media (max-width: 700px) {
    form {
        grid-template-columns: 1fr;
    }

    .summary {
        flex-direction: column;
        gap: 10px;
    }
}