body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
}
.header {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background-color: #ffffff;
    width: 100%;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    z-index: 10;
}
.header img {
    height: 50px;
    margin-right: 10px;
}
.header h1 {
    font-size: 1.5em;
    color: #333;
    margin: 0;
}
.header h2 {
    font-size: 1em;
    color: #333;
    margin: 0;
}
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 20px;
    box-sizing: border-box;
}
.login-box {
    width: 400px;
    background-color: #ffffff;
    border: 1px solid #ddd;
    border-radius: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    padding: 20px;
    text-align: center;
}
.login-box h2 {
    font-size: 1.5em;
    color: #333;
    margin-bottom: 20px;
}
.login-box form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.login-box input[type="text"],
.login-box input[type="password"] {
    padding: 10px;
    font-size: 1em;
    border: 1px solid #ddd;
    border-radius: 5px;
    outline: none;
}
.login-box input[type="text"]:focus,
.login-box input[type="password"]:focus {
    border-color: #56ab2f;
}
.login-box button {
    padding: 10px;
    font-size: 1em;
    background-color: #56ab2f;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}
.login-box button:hover {
    background-color: #4a9627;
}
.error-message {
    color: red;
    font-size: 0.9em;
    margin-top: 10px;
    display: none;
}
/* Login hint + PIN page (index.php, set_pin.php) */
.login-box { max-width: 100%; box-sizing: border-box; }   /* no sideways scroll on narrow phones */
.login-hint {
    margin: 0;
    color: #666;
    font-size: 0.85em;
    line-height: 1.5;
    text-align: left;
}
.login-box .login-links { margin-top: 12px; font-size: 0.9em; }
.login-box .login-links a { color: #4a9627; }