/* Efek Glow & Background Dinamis */
body {
    text-align: center;
    font-family: 'Arial', sans-serif;
    background: linear-gradient(45deg, #ff1493, #ff69b4, #ff1493);
    background-size: 400% 400%;
    animation: bg-animation 10s infinite alternate;
    margin: 0;
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

@keyframes bg-animation {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}

/* Container */
.container, #surpriseContainer {
    background: rgba(255, 255, 255, 0.2);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 0px 15px rgba(255, 105, 180, 0.8);
    transition: all 0.5s ease-in-out;
    width: 80%;
    max-width: 500px;
}

/* Tombol */
.btn {
    padding: 12px 25px;
    font-size: 18px;
    background: linear-gradient(45deg, #ff69b4, #ff1493);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    display: inline-block;
    box-shadow: 0 0 10px #ff69b4;
    transition: transform 0.3s, background-color 0.3s;
}

.btn:hover {
    transform: scale(1.1);
    background: linear-gradient(45deg, #ff1493, #ff69b4);
}

/* Surat Cinta */
#surpriseContainer {
    display: none;
    text-align: center;
    font-size: 18px;
    color: white;
    animation: fadeIn 1.5s ease-in-out;
}

/* Efek Ketikan */
#loveLetterText {
    font-family: "Georgia", serif;
    font-size: 20px;
    white-space: pre-wrap;
    display: inline-block;
    text-align: center;
}

/* Efek Fade-in */
@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

.floating-heart {
    position: absolute;
    font-size: 20px;
    opacity: 0.7;
    color: red;
    top: -30px;
    animation: fall 5s linear infinite;
    pointer-events: none;
}

@keyframes fall {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(100vh); opacity: 0; }
}

/* Pastikan canvas ada di belakang konten */
canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}
