/* 固定底部功能列 */
.bottom-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: #fbc02d;
    border-top: 2px solid #f9a825;
    box-shadow: 0 -2px 6px rgba(0,0,0,0.15);
    padding: 12px 0;
}

/* RWD 排版 */
.btn-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* 手機：一排3個 */
    gap: 12px;
    text-align: center;
}

@media (min-width: 768px) {
    .btn-grid {
        grid-template-columns: repeat(6, 1fr); /* 桌機：一排6個 */
    }
}

.btn-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px;
    font-size: 14px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: #000;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

    .btn-icon:hover {
        background-color: rgba(0,0,0,0.1);
        transform: scale(1.05);
    }

    .btn-icon svg {
        width: 40px;
        height: 40px;
        margin-bottom: 4px;
    }

    .btn-icon strong {
        font-size: 13px;
    }

    .btn-icon.selected {
        background-color: rgba(245, 166, 35, 0.8);
    }