html, body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    height: 100%;
    background: radial-gradient(circle at center, #8e0036, #3b0022);
    color: white;
    min-height: 100vh;
    box-sizing: border-box;
}

.hearts {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    z-index: 99;
    pointer-events: auto;

    .svg-heart {
        position: absolute;
        width: 28px;
        height: 28px;
        opacity: 0.22;
        cursor: default;
        pointer-events: auto;
        z-index: 1;
        animation: float 10s linear infinite;
        transition: opacity 0.2s, transform 0.2s;
        will-change: opacity, transform;

        svg {
            width: 100%;
            height: 100%;
            display: block;
            transition: opacity 0.2s, transform 0.2s;
            will-change: opacity, transform;
        }
    }
}

@keyframes float {
    0% {
        transform: translateY(100vh) scale(1);
        opacity: 0;
    }
    50% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-10vh) scale(1);
        opacity: 0;
    }
}

.container {
    width: 100%;
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2rem 1rem 1.5rem 1rem;
    z-index: 100;
    position: relative;
    box-sizing: border-box;
    pointer-events: none;
}

.container a, .container button, .container iframe, .container input, .container textarea {
    pointer-events: auto;
}

h1 {
    font-size: 3.4rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 6px #000;
}

.subheading {
    font-size: 2rem;
    color: #ffd700;
    font-weight: bold;
    text-shadow: 2px 2px 6px #000;
    margin-bottom: 2.5rem;
}

iframe {
    width: 90%;
    max-width: 720px;
    height: 405px;
    border: none;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    margin-bottom: 2rem;
    background: #e0e0e0;
}

.button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: #ffd700;
    color: #111;
    font-weight: bold;
    text-decoration: none;
    font-size: 1.25rem;
    border-radius: 999px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.4);
    transition: transform 0.2s ease;
    margin-bottom: 2.5rem;
}

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

.fb-title {
    font-size: 2.5rem;
}

.fb-card {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 18px;
    margin: 0 0 2.5rem 0;
    padding: 1.3rem 1.5rem;
    width: 100%;
    max-width: 540px;
    color: #fff;
    text-align: left;
    box-shadow: 0 0 12px rgba(0, 0, 0, 0.15);
}

.stars svg {
    width: 18px;
}