#instruction {
    margin-bottom: 1.25rem;
    font-size: 1rem;
    font-weight: bold;
    color: var(--muted);
    text-align: center;
}

#target-area {
    width: 200px;
    height: 100px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 1rem;
    color: var(--muted);
    margin: 1rem auto;
    cursor: context-menu;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: box-shadow 0.3s ease;
}

#target-area:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

#context-menu {
    position: absolute;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: none;
    z-index: 1000;
    min-width: 120px;
}

#context-menu ul {
    list-style: none;
    margin: 0;
    padding: 0.25rem 0;
}

#context-menu li {
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    border-bottom: 1px solid #e6e9ef;
    font-size: 0.9rem;
}

#context-menu li:hover {
    background: var(--accent);
    color: white;
}

#context-menu li:last-child {
    border-bottom: none;
}


@media (max-width: 1440px) {
    #instruction {
        font-size: 0.95rem;
    }
    #target-area {
        width: 180px;
        height: 90px;
        font-size: 0.95rem;
    }
    body {
        font-size: 15px;
    }
}

@media (max-width: 1024px) {
    #instruction {
        font-size: 0.9rem;
    }
    #target-area {
        width: 160px;
        height: 80px;
        font-size: 0.9rem;
    }
    #context-menu li {
        padding: 0.45rem 0.9rem;
        font-size: 0.85rem;
    }
    body {
        font-size: 14px;
    }
}

@media (max-width: 768px) {
    #instruction {
        font-size: 0.85rem;
    }
    #target-area {
        width: 140px;
        height: 70px;
        font-size: 0.85rem;
    }
    #context-menu li {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    body {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    #instruction {
        font-size: 0.8rem;
    }
    #target-area {
        width: 120px;
        height: 60px;
        font-size: 0.8rem;
    }
    #context-menu li {
        padding: 0.35rem 0.7rem;
        font-size: 0.75rem;
    }
    body {
        font-size: 12px;
    }
}

@media (max-width: 375px) {
    #instruction {
        font-size: 0.75rem;
    }
    #target-area {
        width: 100px;
        height: 50px;
        font-size: 0.75rem;
    }
    #context-menu li {
        padding: 0.3rem 0.6rem;
        font-size: 0.7rem;
    }
    body {
        font-size: 11px;
    }
}