body {
    margin: 0;
    height: 100vh;
    font-family: 'Segoe UI', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #ffc1cc, #ff9eb5);
    overflow: hidden;
}

.proposal-box {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    position: relative;
    z-index: 10;
}

h2 {
    margin-bottom: 30px;
    color: #e91e63;
}

.btn {
    padding: 12px 25px;
    margin: 10px;
    border-radius: 30px;
    border: none;
    font-size: 16px;
    cursor: pointer;
}

.yes-btn {
    background: #ff4081;
    color: white;
}

.no-btn {
    background: #ccc;
    color: black;
    position: absolute;
}

.celebration {
    display: none;
    position: absolute;
    text-align: center;
    color: white;
    z-index: 20;
}

.celebration h1 {
    font-size: 40px;
    margin-bottom: 20px;
}

.details {
    font-size: 20px;
}

.heart {
    position: absolute;
    color: red;
    animation: float 5s linear infinite;
    font-size: 24px;
}

@keyframes float {
    from { transform: translateY(100vh); opacity: 1; }
    to { transform: translateY(-10vh); opacity: 0; }
}