:root {
    --bg: #1f1d1d;
    --bg-lighter: #2c2928;
    --text: #e5e5e5;
    --accent: #a5715d;
    --accent-soft: rgba(255, 138, 96, 0.4);
    --accent-softer: rgba(255, 138, 96, 0.25);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg), var(--bg-lighter));
    color: var(--text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    overflow: hidden;
}

/* Background doki words */
.doki-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.doki-word {
    position: absolute;
    font-size: clamp(2rem, 6vw, 6rem);
    font-weight: 700;
    color: var(--accent-softer);
    opacity: var(--alpha, 1);
    user-select: none;
    white-space: nowrap;
    animation: fadeMove 4s ease-in-out forwards;
    filter: blur(var(--blur, 0px));
    z-index: var(--z, 0);
}

@keyframes fadeMove {
    0% {
    opacity: 0;
    transform: translate(0, 0);
    }
    20% {
    opacity: var(--alpha);
    }
    80% {
    opacity: var(--alpha);
    }
    100% {
    opacity: 0;
    transform: translate(var(--tx), var(--ty));
    }
}

/* Center content */
.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 2;
}

/* Heart */
.heart-wrapper {
    position: relative;
    cursor: pointer;
}

.heart {
    width: 120px;
    height: 120px;
    animation: heartbeat 1.4s infinite ease-in-out;
    transform-origin: center;
}

.heart svg {
    width: 100%;
    height: 100%;
    fill: var(--accent);
    filter: drop-shadow(0 0 20px var(--accent-soft));
    transition: transform 0.15s ease;
}

.heart-wrapper:active .heart svg {
    transform: scale(1.25);
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    20% { transform: scale(1.1); }
    40% { transform: scale(1); }
    60% { transform: scale(1.15); }
    80% { transform: scale(1); }
    100% { transform: scale(1); }
}

/* Hover text */
.hover-text {
    margin-top: 48px;
    font-size: 1.5rem;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    text-align: center;
}

.heart-wrapper:hover + .hover-text {
    opacity: 1;
    transform: translateY(0);
}

/* Logo */
.logo {
    position: absolute;
    bottom: 16px;
    right: 16px;
}