:root {
    --bg-color: #171a22;
    --heart-color: #e8496c;
    --text-color: #f5f5f5;
    --glass-bg: rgba(30, 41, 59, 0.6);
}

body {
    margin: 0;
    height: 100vh;

    background: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;

    overflow: hidden;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
}

.container {
    position: fixed;
    inset: 0;
    z-index: 10;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 20px;
    text-align: center;
}

/* Heart */

.heart-container {
    cursor: pointer;
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.heart-wrapper {
    position: relative;
    display: inline-block;
}

.heart-svg {
    width: 120px;
    fill: var(--heart-color);

    filter: drop-shadow(
        0 0 20px rgba(225, 29, 72, 0.8)
    );

    animation: heartbeat 1.5s infinite;
}

.pulse-ring {
    position: absolute;
    inset: 50%;

    width: 100px;
    height: 100px;

    border-radius: 50%;
    border: 2px solid var(--heart-color);

    transform: translate(-50%, -50%);
    animation: ripple 1.5s infinite;
}

.click-hint {
    margin-top: 20px;

    font-family: 'JetBrains Mono', monospace;
    opacity: 0.7;

    animation: fade 2s infinite;
}

/* Card */

.message-card {
    display: none;

    position: relative;
    background: rgba(30, 41, 59, 0.15);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);

    padding: 40px 30px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);

    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);

    opacity: 0;
    transform: translateY(20px);

    transition:
        opacity 0.6s ease,
        transform 0.6s ease;
}

.message-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.title {
    font-size: 2em;
    margin-bottom: 20px;

    background: linear-gradient(
        45deg,
        #fff,
        #fda4af
    );

    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-content {
    line-height: 1.6;
    color: #cbd5e1;
}

.highlight {
    margin-top: 15px;
    font-weight: 600;
    color: #fff;
}

/* Buttons */

.buttons {
    margin-top: 30px;

    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn {
    padding: 12px 30px;

    border-radius: 12px;
    border: none;

    cursor: pointer;
    font-weight: 600;
}

.btn-yes {
    z-index: 20;

    background: linear-gradient(
        135deg,
        #f196aa,
        #e9164a
    );

    color: #fff;
    transition: transform 0.2s;
}

.btn-yes:hover {
    transform: scale(1.05);
}

#btnNoLayout {
    background: #334155;
    color: #94a3b8;

    visibility: hidden;
}

.btn-no.floating {
    position: fixed;
    z-index: 50;

    background: #334155;
    color: #94a3b8;

    opacity: 0;
    pointer-events: none;
}

.btn-no.floating.visible {
    opacity: 1;
    pointer-events: auto;
}

/* Success */

.success-overlay {
    position: absolute;

    opacity: 0;
    pointer-events: none;

    transition: 0.5s;
}

.success-overlay.visible {
    opacity: 1;
}

.ok {
    color: #4ade80;
}

/* Animations */

@keyframes heartbeat {
    0%,
    100% {
        transform: scale(1);
    }

    20% {
        transform: scale(1.15);
    }

    40% {
        transform: scale(1);
    }
}

@keyframes ripple {
    from {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0.8;
    }

    to {
        transform: translate(-50%, -50%) scale(2.5);
        opacity: 0;
    }
}

@keyframes fade {
    0%,
    100% {
        opacity: 0.4;
    }

    50% {
        opacity: 1;
    }
}

/* Mobile */

@media (max-width: 600px) {
    .buttons {
        flex-direction: column;
        gap: 15px;

        min-height: 120px;
        align-items: center;
    }

    #btnNoLayout {
        order: 2;
    }
}