body {
    background-image: url('../../images/bg.jpg'); /* 👈 ระบุ path จากไฟล์ style.css */
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
    font-family: 'Prompt', sans-serif;
    min-height: 100vh;
    margin: 0;
}

.login-box {
    background: rgba(255, 255, 255, 0.85);
    padding: 30px;
    border-radius: 12px;
    max-width: 400px;
    margin: 100px auto;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.btn-login {
    background-color: #f39c12;
    color: white;
    padding: 10px;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    width: 100%;
}

.hidden {
    display: none;
}
.btn-back {
    display: block;
    text-align: center;
    margin-top: 10px;
    background-color: #6ab7a4;
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 14px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.btn-back:hover {
    background-color: #5aa393;
}