/* General body styling */
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f2f5;
}

/* Main container styling */
#app {
    width: 100%;
    max-width: 400px;
    background-color: white;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    text-align: center;
}

/* Input styling */
input[type="text"], input[type="password"] {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    box-sizing: border-box;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    font-size: 16px;
}

/* Button styling */
button {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    background-color: #1890ff;
    color: white;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #40a9ff;
}

/* Error message styling */
#error-message {
    display: none;
    color: #ff4d4f;
    background-color: #fff1f0;
    border: 1px solid #ffa39e;
    padding: 10px;
    border-radius: 4px;
    margin-top: 10px;
    font-size: 14px;
}

/* Heading styling */
h1 {
    font-size: 24px;
    color: #333;
}

/* Link styling */
a {
    color: #1890ff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Logo styling */
.logo {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 240px;
    height: auto;
}