body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #1e3c72, #2a5298, #00b4db);
    font-family: "Segoe UI", sans-serif;
    color: #fff;
}

.login-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
    width: 320px;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
}

label {
    display: block;
    margin-top: 10px;
}

input {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border-radius: 6px;
    border: none;
    outline: none;
}

button {
    width: 100%;
    margin-top: 20px;
    padding: 10px;
    background: #00bfa6;
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #008c9e;
}

.error {
    background: #ffdddd;
    color: #b30000;
    padding: 8px;
    border-radius: 5px;
    text-align: center;
    margin-bottom: 10px;
}

/* ========== FOOTER COPYRIGHT ========== */
.footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    background: rgba(0, 0, 0, 0.3);
    border-top: 2px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    backdrop-filter: blur(6px);
    border-radius: 10px 10px 0 0;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.25);
}

/* Footer untuk mode terang */
body.light-mode .footer {
    background: rgba(255, 255, 255, 0.9);
    border-top: 2px solid rgba(0, 0, 0, 0.1);
    color: #333;
}

/* Responsif */
@media (max-width: 768px) {
    .footer {
        font-size: 0.8rem;
        padding: 15px;
    }
}