/* Reset Dasar */
body, h1, form, input, button {
    margin: 0;
    padding: 0;
    font-family: "Poppins", Arial, sans-serif;
    box-sizing: border-box;
}

/* Mode terang & mode gelap dengan efek futuristik */
:root {
    --bg-color: #0a0a0a;
    --text-color: #f1f1f1;
    --container-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    --button-bg: #ff00ff;
    --button-hover-bg: #ff6600;
    --border-color: #ff00ff;
    --shadow-neon: 0 0 10px var(--button-bg), 0 0 20px var(--button-bg);
    --shadow-3d: 2px 2px 10px rgba(0, 0, 0, 0.6);
}

.dark-mode {
    --bg-color: #101010;
    --text-color: #ffffff;
    --container-bg: linear-gradient(135deg, rgba(30, 30, 30, 0.3), rgba(60, 60, 60, 0.4));
    --button-bg: #00ffcc;
    --button-hover-bg: #00aaff;
    --border-color: #00ffcc;
}

/* Body */
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: all 0.4s ease-in-out;
}

/* Glassmorphism Container dengan efek 3D */
.container {
    width: 90%;
    max-width: 450px;
    margin: 50px auto;
    padding: 25px;
    background: var(--container-bg);
    backdrop-filter: blur(15px);
    border-radius: 12px;
    box-shadow: var(--shadow-neon), var(--shadow-3d);
    text-align: center;
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    perspective: 1000px;
}

.container:hover {
    transform: translateY(-5px) rotateX(7deg) rotateY(5deg);
    box-shadow: 0 5px 18px rgba(255, 0, 255, 0.5), 0 8px 22px rgba(0, 0, 0, 0.9);
}

/* Tombol dengan efek futuristik & 3D */
.button-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

button {
    width: 100%;
    padding: 12px;
    background: var(--button-bg);
    color: var(--text-color);
    border: none;
    border-radius: 6px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    box-shadow: var(--shadow-neon), var(--shadow-3d);
    transition: all 0.4s ease-in-out;
    transform-style: preserve-3d;
    margin-top: 15px;
}

button:hover {
    background: var(--button-hover-bg);
    transform: translateY(-4px) scale(1.08) rotateX(8deg);
    box-shadow: 0 0 20px var(--button-hover-bg), 0 0 30px var(--button-hover-bg);
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

button:active {
    animation: pulse 0.3s ease-in-out;
}

/* QR Code Frame dengan efek floating */
.qr-container img {
    max-width: 100%;
    height: auto;
    border: 3px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-neon), var(--shadow-3d);
    transition: transform 0.3s ease-in-out;
}

.qr-container img:hover {
    transform: scale(1.05) rotateY(3deg);
}

/* Animasi */
@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.container, button, input {
    animation: fadeIn 0.6s ease-in-out;
}

/* Responsif */
@media (max-width: 600px) {
    .container {
        width: 95%;
        padding: 18px;
    }
    h1 {
        font-size: 22px;
    }
    input[type="text"], button {
        font-size: 16px;
    }
}