body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f8ff;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 700px;
    margin: 20px auto;
    padding: 20px;
    background-color: #ffffff;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    background: linear-gradient(145deg, #e6f7ff, #ffffff);
    border: 1px solid #b3d4fc;
}

h1, h2 {
    text-align: center;
    color: #0073e6;
}

.form-group {
    margin-top: 15px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #00509e;
}

input[type="text"],
input[type="date"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    box-sizing: border-box;
    border: 2px solid #cce7ff;
    border-radius: 6px;
    background-color: #f0f8ff;
    font-size: 16px;
}

button {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 15px;
    background-color: #0073e6;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #005bb5;
}

.error-message {
    color: red;
    font-size: 0.875em;
    display: none;
}

.hidden {
    display: none;
}

.result {
    margin-top: 25px;
    background-color: #f0faff;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #cce7ff;
}

.result h3 {
    margin-bottom: 10px;
    color: #0073e6;
}