* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f4f6f8; 
    color: #333;
    line-height: 1.6;
    font-size: 16px;
}


header {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    padding: 20px 0;
    color: #1a1a1a;
    background-color: #ffffff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}


.name {
    background-color: #2c3e50; 
    color: #ffffff;
    font-size: 2rem;
    padding: 25px 0;
    text-align: center;
}


.a, .main, .ab {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    margin: 20px auto;
    max-width: 500px;
}

.main {
    width: 450px;
    height: auto;
    padding-top: 40px;
}

.ab {
    width: 360px;
    height: auto;
    padding-top: 25px;
}


.details {
    max-width: 850px;
    margin: 30px auto;
    padding: 50px 20px 20px 20px;
    border-radius: 12px;
    border: 1px solid #d1d1d1;
    background-color: #ffffff;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.H {
    text-align: center;
    background-color: #2c3e50;
    color: #ffffff;
    padding: 12px 0;
    font-weight: 600;
    border-radius: 8px 8px 0 0;
}


button {
    background-color: #2980b9;
    color: #ffffff;
    padding: 10px 18px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #1f6391;
}


table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    border: 1px solid #d1d1d1;
    padding: 12px 15px;
    text-align: center;
}

th {
    background-color: #287bb3;
    color: #ffffff;
    font-weight: 500;
}

tr:nth-child(even) {
    background-color: #f9f9f9;
}


input, select, textarea {
    width: 100%;
    padding: 8px 12px;
    margin: 8px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    background-color: #f7f7f7;
    font-size: 1rem;
}

textarea {
    min-height: 100px;
    resize: vertical;
}


@media (max-width: 768px) {
    .a, .main, .ab, .details {
        width: 90%;
        padding: 20px;
    }

    table, th, td {
        font-size: 0.9rem;
    }
}
#weeklyChart, #monthlyChart {
    display: block;
    margin: auto;
}