html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden; /* Tidak ada scroll */
}
body {
    min-height: 100vh;
    font-family: Arial, sans-serif;
    position: relative;
}

/* Background gambar */
.background-image {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: 0;
    background: url('img/bg.jpg') no-repeat center center;
    background-size: cover;
}

/* Overlay transparan di atas gambar */
.background-overlay {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.35);
    z-index: 1;
}

/* Card login transparan putih, tengah layar */
.centered-box {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    width: 80vw;
    max-width: 900px;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.70); /* Putih transparan */
    border-radius: 18px;
    box-shadow: 0 4px 32px 0 rgba(0,0,0,0.06);
    padding: 0;
}

/* Logo */
.logo-container {
    text-align: center;
    margin-bottom: 12px;
}
.logo {
    width: 140px;
    height: auto;
    margin-bottom: 12px;
}

/* Judul dan subjudul */
.login-title {
    color: #444;
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    text-shadow: 0 2px 8px #eee;
    margin-bottom: 12px;
}
.login-subtitle {
    color: #444;
    font-size: 1.4rem;
    text-align: center;
    text-shadow: 0 2px 8px #eee;
    margin-bottom: 32px;
}

/* Form login */
form {
    background: transparent;
    padding: 0;
    border-radius: 12px;
    max-width: 380px;
    width: 100%;
    margin: 0 auto;
}
form label {
    font-weight: bold;
    margin-top: 8px;
    display: block;
}
form input[type="text"], form input[type="password"] {
    width: 100%;
    padding: 8px 10px;
    margin-top: 5px;
    margin-bottom: 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    background: #f9f9f9;
}
form button {
    width: 100%;
    padding: 9px 0;
    background: #3498db;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1.05rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}
form button:hover {
    background: #217dbb;
}

/* Error message */
.error {
    background: #f8d7da;
    color: #842029;
    border: 1px solid #f5c2c7;
    border-radius: 6px;
    padding: 10px;
    text-align: center;
    margin: 0 auto 18px auto;
    max-width: 350px;
}

/* Copyright: jelas, kontras, mudah dibaca */
.copyright {
    color: #222;
    font-weight: bold;
    padding: 6px 18px;
    border-radius: 9px;
    background: rgba(255,255,255,0.9); /* Putih transparan, supaya jelas */
    display: inline-block;
    text-shadow: 0 2px 8px #fff, 0 1px 0 #fff;
    font-size: 1.1rem;
    letter-spacing: 1px;
    margin-top: 32px;
    box-shadow: 0 1px 10px 0 rgba(0,0,0,0.03);
    user-select: none;
}

/* Responsif */
@media (max-width: 600px) {
    .centered-box {
        width: 98vw;
        min-height: 97vh;
        padding: 10px 2vw;
    }
    .logo { width: 80px; }
    .login-title { font-size: 1.2rem; }
    .login-subtitle { font-size: 1rem; }
    .copyright { font-size: 0.96rem; padding: 4px 7px; }
}

 .copyright {
            text-align: center;
            margin-top: 20px;
        }
        .timestamp {
            margin-bottom: 5px;
        }
        .license {
            font-size: 14px;
        }