* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    background:
        radial-gradient(circle at 20% -10%, rgba(144, 224, 239, 0.35), transparent 34%),
        radial-gradient(circle at 80% -20%, rgba(74, 222, 242, 0.25), transparent 40%),
        linear-gradient(180deg, #5ec8e5 0%, #1d7ea1 30%, #0c4d71 62%, #05253a 100%);
    overflow: hidden;
    position: relative;
    color: #f3fbff;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(circle at 10% 100%, rgba(214, 255, 255, 0.3) 0 0.55rem, transparent 0.62rem),
        radial-gradient(circle at 28% 100%, rgba(214, 255, 255, 0.28) 0 0.42rem, transparent 0.48rem),
        radial-gradient(circle at 44% 100%, rgba(214, 255, 255, 0.3) 0 0.65rem, transparent 0.74rem),
        radial-gradient(circle at 64% 100%, rgba(214, 255, 255, 0.28) 0 0.45rem, transparent 0.52rem),
        radial-gradient(circle at 82% 100%, rgba(214, 255, 255, 0.3) 0 0.7rem, transparent 0.76rem),
        radial-gradient(circle at 94% 100%, rgba(214, 255, 255, 0.25) 0 0.36rem, transparent 0.42rem);
    animation: bubbles-rise 16s linear infinite;
}


.page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    position: relative;
    z-index: 3;
}

.hidden {
    display: none;
}

.card {
    width: min(800px, 100%);
    height: min(700px, 100%);
    text-align: center;
    background:
        linear-gradient(160deg, rgba(194, 245, 255, 0.2), rgba(58, 153, 181, 0.12)),
        rgba(4, 53, 74, 0.58);
    border-radius: 24px;
    padding: 2rem;
    border: 1px solid rgba(184, 243, 255, 0.35);
    box-shadow: 0 24px 48px rgba(0, 14, 24, 0.45);
    backdrop-filter: blur(8px);
    position: relative;
}

.valentine-image {
    width: 90%;
    height: auto;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

h1 {
    color: #e5fbff;
    text-shadow: 0 3px 10px rgba(0, 40, 62, 0.5);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    margin-bottom: 1.25rem;
}

.button-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 120px;
    border: none;
    border-radius: 999px;
    text-decoration: none;
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    padding: 0.8rem 1.4rem;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-yes {
    background: linear-gradient(135deg, #2fd1ff, #0a8bb1);
    box-shadow: 0 8px 20px rgba(9, 131, 170, 0.4);
}

.btn-no {
    background: linear-gradient(135deg, #5e6f79, #33434d);
    box-shadow: 0 8px 20px rgba(35, 48, 56, 0.4);
}

.btn-restart {
    background: linear-gradient(135deg, #5e6f79, #33434d);
    box-shadow: 0 8px 20px rgba(9, 131, 170, 0.4);
    margin-bottom: 1rem;
}

@keyframes bubbles-rise {
    0% {
        transform: translateY(0);
        opacity: 0.5;
    }

    50% {
        opacity: 0.9;
    }

    100% {
        transform: translateY(-110vh);
        opacity: 0;
    }
}

@media (max-width: 480px) {
    .card {
        padding: 1.25rem;
    }

    .btn {
        min-width: 105px;
        font-size: 0.95rem;
    }
}