body {
    font-family: Arial, sans-serif;
    margin: 2em;
    background: #f8f9fa;
}
h1 {
    color: #2c3e50;
}
.controls {
    margin-bottom: 1em;
}
label {
    margin-right: 0.5em;
}
input[type="date"] {
    padding: 0.3em;
    font-size: 1em;
}
button {
    padding: 0.4em 1em;
    font-size: 1em;
    background: #2980b9;
    color: #fff;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}
button:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1em;
    background: #fff;
}
th, td {
    border: 1px solid #dfe6e9;
    padding: 0.5em;
    text-align: left;
}
th {
    background: #ecf0f1;
}
.error {
    color: #c0392b;
    margin-top: 1em;
}