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

body {
    background: #f5f5f0;
    min-height: 100vh;
    font-family: 'Helvetica Neue', 'Hiragino Sans', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

.instruction {
    text-align: center;
    color: #1d1d1b;
    padding: 2rem;
}

.arrow {
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 1;
    margin-bottom: 1rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.text {
    font-size: clamp(1.4rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: 0.02em;
}

.sub {
    margin-top: 1.5rem;
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    line-height: 1.6;
    opacity: 0.6;
}

.text-mobile {
    font-size: clamp(1.4rem, 5vw, 2rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    line-height: 1.4;
}

.sub-quiet {
    margin-top: 3rem;
    font-size: clamp(0.85rem, 3vw, 1rem);
    line-height: 1.7;
    opacity: 0.4;
    font-style: italic;
}

.mobile-only { display: none; }
.desktop-only { display: block; }

@media (max-width: 768px), (hover: none) {
    .desktop-only { display: none; }
    .mobile-only { display: block; }
}