body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    font-family: Arial, sans-serif;
    color: white;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

h1 {
    font-size: 4em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

h2 {
    font-size: 3em;
    margin-bottom: 30px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.birthday-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    margin: 20px auto;
    max-width: 800px;
}

.wishes {
    font-size: 1.2em;
    line-height: 1.6;
    margin-bottom: 30px;
}

.birthday-cake {
    margin: 20px auto;
    max-width: 300px;
}

.birthday-cake img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.3));
}

.photo-gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.photo {
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: transform 0.3s;
}

.photo:hover {
    transform: scale(1.05);
}

.floating-balloons {
    position: fixed;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.balloon {
    position: absolute;
    font-size: 40px;
    animation: float 15s linear infinite;
}

.balloon:nth-child(1) { left: 10%; animation-delay: 0s; }
.balloon:nth-child(2) { left: 30%; animation-delay: 4s; }
.balloon:nth-child(3) { left: 50%; animation-delay: 8s; }
.balloon:nth-child(4) { left: 70%; animation-delay: 12s; }

@keyframes float {
    0% { bottom: -100px; transform: translateX(0) rotate(0); }
    50% { transform: translateX(100px) rotate(10deg); }
    100% { bottom: 100vh; transform: translateX(-100px) rotate(-10deg); }
}

.music-control {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

#musicButton {
    background: none;
    border: none;
    font-size: 30px;
    cursor: pointer;
    padding: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transition: transform 0.3s;
}

#musicButton:hover {
    transform: scale(1.1);
}